diff --git a/client-adapter/common/pom.xml b/client-adapter/common/pom.xml
index 2bab94c2..15270c11 100644
--- a/client-adapter/common/pom.xml
+++ b/client-adapter/common/pom.xml
@@ -54,6 +54,11 @@
             <artifactId>junit</artifactId>
             <scope>test</scope>
         </dependency>
+        <dependency>
+            <groupId>org.yaml</groupId>
+            <artifactId>snakeyaml</artifactId>
+            <scope>test</scope>
+        </dependency>
         <dependency>
             <groupId>com.diffblue</groupId>
             <artifactId>deeptestutils</artifactId>
diff --git a/client-adapter/common/src/test/java/com/alibaba/otter/canal/client/adapter/support/YamlUtilsTest.java b/client-adapter/common/src/test/java/com/alibaba/otter/canal/client/adapter/support/YamlUtilsTest.java
index d64ffe26..2246c3c1 100644
--- a/client-adapter/common/src/test/java/com/alibaba/otter/canal/client/adapter/support/YamlUtilsTest.java
+++ b/client-adapter/common/src/test/java/com/alibaba/otter/canal/client/adapter/support/YamlUtilsTest.java
@@ -1,14 +1,17 @@
 package com.alibaba.otter.canal.client.adapter.support;
 
+import org.junit.Assert;
+import org.junit.Test;
+import org.springframework.beans.factory.annotation.Value;
+
 import java.util.LinkedHashMap;
 import java.util.Map;
 import java.util.Properties;
 
-import org.junit.Assert;
-import org.junit.Test;
-
 public class YamlUtilsTest {
 
+
+
     @Test
     public void testLoadConfigToYml() {
         String configStr="dataSourceKey: defaultDS\n"
@@ -17,6 +20,7 @@ public class YamlUtilsTest {
             + "outerAdapterKey: mysql1\n"
             + "concurrent: true\n"
             + "dbMapping:\n"
+            + "  _id: _id\n"
             + "  database: mytest\n"
             + "  table: user\n"
             + "  targetTable: mytest2.user\n"
@@ -35,6 +39,7 @@ public class YamlUtilsTest {
         MappingConfig config = YamlUtils.ymlToObj(null, configStr, MappingConfig.class, null, new Properties());
 
         Assert.assertNotNull(config);
+        Assert.assertEquals(config.getDbMapping().getId(), "_id");
         Assert.assertEquals(config.getDestination(), "example");
         Assert.assertEquals(config.getOuterAdapterKey(), "mysql1");
         Assert.assertEquals(config.getDbMapping().getDatabase(), "mytest");
@@ -104,6 +109,9 @@ public class YamlUtilsTest {
     }
 
     private static class DbMapping {
+
+        @Value("${_id}")
+        private String id ;
         private boolean             mirrorDb        = false;                 // 是否镜像库
         private String              database;                                // 数据库名或schema名
         private String              table;                                   // 表名
@@ -225,5 +233,13 @@ public class YamlUtilsTest {
         public void setAllMapColumns(Map<String, String> allMapColumns) {
             this.allMapColumns = allMapColumns;
         }
+
+        public String getId() {
+            return id;
+        }
+
+        public void setId(String id) {
+            this.id = id;
+        }
     }
 }
diff --git a/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/ES6xAdapter.java b/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/ES6xAdapter.java
index 85ac4085..647b62b5 100644
--- a/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/ES6xAdapter.java
+++ b/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/ES6xAdapter.java
@@ -59,12 +59,12 @@ public class ES6xAdapter extends ESAdapter {
     public Map<String, Object> count(String task) {
         ESSyncConfig config = esSyncConfig.get(task);
         ESSyncConfig.ESMapping mapping = config.getEsMapping();
-        SearchResponse response = this.esConnection.new ESSearchRequest(mapping.get_index(), mapping.get_type()).size(0)
+        SearchResponse response = this.esConnection.new ESSearchRequest(mapping.getIndex(), mapping.getType()).size(0)
             .getResponse();
 
         long rowCount = response.getHits().getTotalHits();
         Map<String, Object> res = new LinkedHashMap<>();
-        res.put("esIndex", mapping.get_index());
+        res.put("esIndex", mapping.getIndex());
         res.put("count", rowCount);
         return res;
     }
diff --git a/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/etl/ESEtlService.java b/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/etl/ESEtlService.java
index 40b4a4ab..b15719e0 100644
--- a/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/etl/ESEtlService.java
+++ b/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/etl/ESEtlService.java
@@ -51,7 +51,7 @@ public class ESEtlService extends AbstractEtlService {
 
     public EtlResult importData(List<String> params) {
         ESMapping mapping = config.getEsMapping();
-        logger.info("start etl to import data to index: {}", mapping.get_index());
+        logger.info("start etl to import data to index: {}", mapping.getIndex());
         String sql = mapping.getSql();
         return importData(sql, params);
     }
@@ -78,7 +78,7 @@ public class ESEtlService extends AbstractEtlService {
                             }
 
                             // 如果是主键字段则不插入
-                if (fieldItem.getFieldName().equals(mapping.get_id())) {
+                if (fieldItem.getFieldName().equals(mapping.getId())) {
                     idVal = esTemplate.getValFromRS(mapping, rs, fieldName, fieldName);
                 } else {
                     Object val = esTemplate.getValFromRS(mapping, rs, fieldName, fieldName);
@@ -117,8 +117,8 @@ public class ESEtlService extends AbstractEtlService {
             if (idVal != null) {
                 String parentVal = (String) esFieldData.remove("$parent_routing");
                 if (mapping.isUpsert()) {
-                    ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.get_index(),
-                        mapping.get_type(),
+                    ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.getIndex(),
+                        mapping.getType(),
                         idVal.toString()).setDoc(esFieldData).setDocAsUpsert(true);
 
                     if (StringUtils.isNotEmpty(parentVal)) {
@@ -127,8 +127,8 @@ public class ESEtlService extends AbstractEtlService {
 
                     esBulkRequest.add(esUpdateRequest);
                 } else {
-                    ESIndexRequest esIndexRequest = this.esConnection.new ES6xIndexRequest(mapping.get_index(),
-                        mapping.get_type(),
+                    ESIndexRequest esIndexRequest = this.esConnection.new ES6xIndexRequest(mapping.getIndex(),
+                        mapping.getType(),
                         idVal.toString()).setSource(esFieldData);
                     if (StringUtils.isNotEmpty(parentVal)) {
                         esIndexRequest.setRouting(parentVal);
@@ -137,12 +137,12 @@ public class ESEtlService extends AbstractEtlService {
                 }
             } else {
                 idVal = esFieldData.get(mapping.getPk());
-                ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index(),
-                    mapping.get_type()).setQuery(QueryBuilders.termQuery(mapping.getPk(), idVal)).size(10000);
+                ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex(),
+                    mapping.getType()).setQuery(QueryBuilders.termQuery(mapping.getPk(), idVal)).size(10000);
                 SearchResponse response = esSearchRequest.getResponse();
                 for (SearchHit hit : response.getHits()) {
-                    ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.get_index(),
-                        mapping.get_type(),
+                    ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.getIndex(),
+                        mapping.getType(),
                         hit.getId()).setDoc(esFieldData);
                     esBulkRequest.add(esUpdateRequest);
                 }
@@ -160,7 +160,7 @@ public class ESEtlService extends AbstractEtlService {
                         (System.currentTimeMillis() - batchBegin),
                         (System.currentTimeMillis() - esBatchBegin),
                         esBulkRequest.numberOfActions(),
-                        mapping.get_index());
+                        mapping.getIndex());
                 }
                 batchBegin = System.currentTimeMillis();
                 esBulkRequest.resetBulk();
@@ -180,12 +180,12 @@ public class ESEtlService extends AbstractEtlService {
                     (System.currentTimeMillis() - batchBegin),
                     (System.currentTimeMillis() - esBatchBegin),
                     esBulkRequest.numberOfActions(),
-                    mapping.get_index());
+                    mapping.getIndex());
             }
         }
     } catch (Exception e) {
         logger.error(e.getMessage(), e);
-        errMsg.add(mapping.get_index() + " etl failed! ==>" + e.getMessage());
+        errMsg.add(mapping.getIndex() + " etl failed! ==>" + e.getMessage());
         throw new RuntimeException(e);
     }
     return count;
diff --git a/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/support/ES6xTemplate.java b/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/support/ES6xTemplate.java
index 2e81b905..44617dc1 100644
--- a/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/support/ES6xTemplate.java
+++ b/client-adapter/es6x/src/main/java/com/alibaba/otter/canal/client/adapter/es6x/support/ES6xTemplate.java
@@ -66,19 +66,19 @@ public class ES6xTemplate implements ESTemplate {
 
     @Override
     public void insert(ESSyncConfig.ESMapping mapping, Object pkVal, Map<String, Object> esFieldData) {
-        if (mapping.get_id() != null) {
+        if (mapping.getId() != null) {
             String parentVal = (String) esFieldData.remove("$parent_routing");
             if (mapping.isUpsert()) {
-                ESUpdateRequest updateRequest = esConnection.new ES6xUpdateRequest(mapping.get_index(),
-                    mapping.get_type(),
+                ESUpdateRequest updateRequest = esConnection.new ES6xUpdateRequest(mapping.getIndex(),
+                    mapping.getType(),
                     pkVal.toString()).setDoc(esFieldData).setDocAsUpsert(true);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     updateRequest.setRouting(parentVal);
                 }
                 getBulk().add(updateRequest);
             } else {
-                ESIndexRequest indexRequest = esConnection.new ES6xIndexRequest(mapping.get_index(),
-                    mapping.get_type(),
+                ESIndexRequest indexRequest = esConnection.new ES6xIndexRequest(mapping.getIndex(),
+                    mapping.getType(),
                     pkVal.toString()).setSource(esFieldData);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     indexRequest.setRouting(parentVal);
@@ -87,13 +87,13 @@ public class ES6xTemplate implements ESTemplate {
             }
             commitBulk();
         } else {
-            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index(),
-                mapping.get_type()).setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal)).size(10000);
+            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex(),
+                mapping.getType()).setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal)).size(10000);
             SearchResponse response = esSearchRequest.getResponse();
 
             for (SearchHit hit : response.getHits()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.get_index(),
-                    mapping.get_type(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.getIndex(),
+                    mapping.getType(),
                     hit.getId()).setDoc(esFieldData);
                 getBulk().add(esUpdateRequest);
                 commitBulk();
@@ -150,19 +150,19 @@ public class ES6xTemplate implements ESTemplate {
 
     @Override
     public void delete(ESSyncConfig.ESMapping mapping, Object pkVal, Map<String, Object> esFieldData) {
-        if (mapping.get_id() != null) {
-            ESDeleteRequest esDeleteRequest = this.esConnection.new ES6xDeleteRequest(mapping.get_index(),
-                mapping.get_type(),
+        if (mapping.getId() != null) {
+            ESDeleteRequest esDeleteRequest = this.esConnection.new ES6xDeleteRequest(mapping.getIndex(),
+                mapping.getType(),
                 pkVal.toString());
             getBulk().add(esDeleteRequest);
             commitBulk();
         } else {
-            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index(),
-                mapping.get_type()).setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal)).size(10000);
+            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex(),
+                mapping.getType()).setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal)).size(10000);
             SearchResponse response = esSearchRequest.getResponse();
             for (SearchHit hit : response.getHits()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.get_index(),
-                    mapping.get_type(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.getIndex(),
+                    mapping.getType(),
                     hit.getId()).setDoc(esFieldData);
                 getBulk().add(esUpdateRequest);
                 commitBulk();
@@ -207,7 +207,7 @@ public class ES6xTemplate implements ESTemplate {
     public Object getESDataFromRS(ESSyncConfig.ESMapping mapping, ResultSet resultSet,
                                   Map<String, Object> esFieldData) throws SQLException {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             Object value = getValFromRS(mapping, resultSet, fieldItem.getFieldName(), fieldItem.getFieldName());
@@ -216,7 +216,7 @@ public class ES6xTemplate implements ESTemplate {
                 resultIdVal = value;
             }
 
-            if (!fieldItem.getFieldName().equals(mapping.get_id())
+            if (!fieldItem.getFieldName().equals(mapping.getId())
                     && !mapping.getSkips().contains(fieldItem.getFieldName())) {
                 esFieldData.put(Util.cleanColumn(fieldItem.getFieldName()), value);
             }
@@ -231,7 +231,7 @@ public class ES6xTemplate implements ESTemplate {
     @Override
     public Object getIdValFromRS(ESSyncConfig.ESMapping mapping, ResultSet resultSet) throws SQLException {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             Object value = getValFromRS(mapping, resultSet, fieldItem.getFieldName(), fieldItem.getFieldName());
@@ -248,7 +248,7 @@ public class ES6xTemplate implements ESTemplate {
     public Object getESDataFromRS(ESSyncConfig.ESMapping mapping, ResultSet resultSet, Map<String, Object> dmlOld,
                                   Map<String, Object> esFieldData) throws SQLException {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             if (fieldItem.getFieldName().equals(idFieldName)) {
@@ -294,7 +294,7 @@ public class ES6xTemplate implements ESTemplate {
     public Object getESDataFromDmlData(ESSyncConfig.ESMapping mapping, Map<String, Object> dmlData,
                                        Map<String, Object> esFieldData) {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             String columnName = fieldItem.getColumnItems().iterator().next().getColumnName();
@@ -304,7 +304,7 @@ public class ES6xTemplate implements ESTemplate {
                 resultIdVal = value;
             }
 
-            if (!fieldItem.getFieldName().equals(mapping.get_id())
+            if (!fieldItem.getFieldName().equals(mapping.getId())
                     && !mapping.getSkips().contains(fieldItem.getFieldName())) {
                 esFieldData.put(Util.cleanColumn(fieldItem.getFieldName()), value);
             }
@@ -319,7 +319,7 @@ public class ES6xTemplate implements ESTemplate {
     public Object getESDataFromDmlData(ESSyncConfig.ESMapping mapping,String owner, Map<String, Object> dmlData,
                                        Map<String, Object> dmlOld, Map<String, Object> esFieldData) {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             ColumnItem columnItem = fieldItem.getColumnItems().iterator().next();
@@ -353,19 +353,19 @@ public class ES6xTemplate implements ESTemplate {
     }
 
     private void append4Update(ESMapping mapping, Object pkVal, Map<String, Object> esFieldData) {
-        if (mapping.get_id() != null) {
+        if (mapping.getId() != null) {
             String parentVal = (String) esFieldData.remove("$parent_routing");
             if (mapping.isUpsert()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.get_index(),
-                    mapping.get_type(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.getIndex(),
+                    mapping.getType(),
                     pkVal.toString()).setDoc(esFieldData).setDocAsUpsert(true);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     esUpdateRequest.setRouting(parentVal);
                 }
                 getBulk().add(esUpdateRequest);
             } else {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.get_index(),
-                    mapping.get_type(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.getIndex(),
+                    mapping.getType(),
                     pkVal.toString()).setDoc(esFieldData);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     esUpdateRequest.setRouting(parentVal);
@@ -373,12 +373,12 @@ public class ES6xTemplate implements ESTemplate {
                 getBulk().add(esUpdateRequest);
             }
         } else {
-            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index(),
-                mapping.get_type()).setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal)).size(10000);
+            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex(),
+                mapping.getType()).setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal)).size(10000);
             SearchResponse response = esSearchRequest.getResponse();
             for (SearchHit hit : response.getHits()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.get_index(),
-                    mapping.get_type(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES6xUpdateRequest(mapping.getIndex(),
+                    mapping.getType(),
                     hit.getId()).setDoc(esFieldData);
                 getBulk().add(esUpdateRequest);
             }
@@ -394,15 +394,15 @@ public class ES6xTemplate implements ESTemplate {
      */
     @SuppressWarnings("unchecked")
     private String getEsType(ESMapping mapping, String fieldName) {
-        String key = mapping.get_index() + "-" + mapping.get_type();
+        String key = mapping.getIndex() + "-" + mapping.getType();
         Map<String, String> fieldType = esFieldTypes.get(key);
         if (fieldType != null) {
             return fieldType.get(fieldName);
         } else {
-            MappingMetaData mappingMetaData = esConnection.getMapping(mapping.get_index(), mapping.get_type());
+            MappingMetaData mappingMetaData = esConnection.getMapping(mapping.getIndex(), mapping.getType());
 
             if (mappingMetaData == null) {
-                throw new IllegalArgumentException("Not found the mapping info of index: " + mapping.get_index());
+                throw new IllegalArgumentException("Not found the mapping info of index: " + mapping.getIndex());
             }
 
             fieldType = new LinkedHashMap<>();
diff --git a/client-adapter/es6x/src/test/java/com/alibaba/otter/canal/client/adapter/es6x/test/ConfigLoadTest.java b/client-adapter/es6x/src/test/java/com/alibaba/otter/canal/client/adapter/es6x/test/ConfigLoadTest.java
index 2d5c74b6..a190cba4 100644
--- a/client-adapter/es6x/src/test/java/com/alibaba/otter/canal/client/adapter/es6x/test/ConfigLoadTest.java
+++ b/client-adapter/es6x/src/test/java/com/alibaba/otter/canal/client/adapter/es6x/test/ConfigLoadTest.java
@@ -29,9 +29,9 @@ public class ConfigLoadTest {
         Assert.assertNotNull(config);
         Assert.assertEquals("defaultDS", config.getDataSourceKey());
         ESSyncConfig.ESMapping esMapping = config.getEsMapping();
-        Assert.assertEquals("mytest_user", esMapping.get_index());
-        Assert.assertEquals("_doc", esMapping.get_type());
-        Assert.assertEquals("id", esMapping.get_id());
+        Assert.assertEquals("mytest_user", esMapping.getIndex());
+        Assert.assertEquals("_doc", esMapping.getType());
+        Assert.assertEquals("id", esMapping.getId());
         Assert.assertNotNull(esMapping.getSql());
 
         // Map<String, List<ESSyncConfig>> dbTableEsSyncConfig =
diff --git a/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/ES7xAdapter.java b/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/ES7xAdapter.java
index 18fd572e..94ad1c17 100644
--- a/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/ES7xAdapter.java
+++ b/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/ES7xAdapter.java
@@ -59,11 +59,11 @@ public class ES7xAdapter extends ESAdapter {
     public Map<String, Object> count(String task) {
         ESSyncConfig config = esSyncConfig.get(task);
         ESSyncConfig.ESMapping mapping = config.getEsMapping();
-        SearchResponse response = this.esConnection.new ESSearchRequest(mapping.get_index()).size(0).getResponse();
+        SearchResponse response = this.esConnection.new ESSearchRequest(mapping.getIndex()).size(0).getResponse();
 
         long rowCount = response.getHits().getTotalHits().value;
         Map<String, Object> res = new LinkedHashMap<>();
-        res.put("esIndex", mapping.get_index());
+        res.put("esIndex", mapping.getIndex());
         res.put("count", rowCount);
         return res;
     }
diff --git a/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/etl/ESEtlService.java b/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/etl/ESEtlService.java
index 05b20cf9..a70ea535 100644
--- a/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/etl/ESEtlService.java
+++ b/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/etl/ESEtlService.java
@@ -51,7 +51,7 @@ public class ESEtlService extends AbstractEtlService {
 
     public EtlResult importData(List<String> params) {
         ESMapping mapping = config.getEsMapping();
-        logger.info("start etl to import data to index: {}", mapping.get_index());
+        logger.info("start etl to import data to index: {}", mapping.getIndex());
         String sql = mapping.getSql();
         return importData(sql, params);
     }
@@ -78,7 +78,7 @@ public class ESEtlService extends AbstractEtlService {
                             }
 
                             // 如果是主键字段则不插入
-                            if (fieldItem.getFieldName().equals(mapping.get_id())) {
+                            if (fieldItem.getFieldName().equals(mapping.getId())) {
                                 idVal = esTemplate.getValFromRS(mapping, rs, fieldName, fieldName);
                             } else {
                                 Object val = esTemplate.getValFromRS(mapping, rs, fieldName, fieldName);
@@ -118,7 +118,7 @@ public class ESEtlService extends AbstractEtlService {
                             String parentVal = (String) esFieldData.remove("$parent_routing");
                             if (mapping.isUpsert()) {
                                 ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(
-                                    mapping.get_index(),
+                                    mapping.getIndex(),
                                     idVal.toString()).setDoc(esFieldData).setDocAsUpsert(true);
 
                                 if (StringUtils.isNotEmpty(parentVal)) {
@@ -128,7 +128,7 @@ public class ESEtlService extends AbstractEtlService {
                                 esBulkRequest.add(esUpdateRequest);
                             } else {
                                 ESIndexRequest esIndexRequest = this.esConnection.new ES7xIndexRequest(
-                                    mapping.get_index(),
+                                    mapping.getIndex(),
                                     idVal.toString()).setSource(esFieldData);
                                 if (StringUtils.isNotEmpty(parentVal)) {
                                     esIndexRequest.setRouting(parentVal);
@@ -137,13 +137,13 @@ public class ESEtlService extends AbstractEtlService {
                             }
                         } else {
                             idVal = esFieldData.get(mapping.getPk());
-                            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index())
+                            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex())
                                 .setQuery(QueryBuilders.termQuery(mapping.getPk(), idVal))
                                 .size(10000);
                             SearchResponse response = esSearchRequest.getResponse();
                             for (SearchHit hit : response.getHits()) {
                                 ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(
-                                    mapping.get_index(),
+                                    mapping.getIndex(),
                                     hit.getId()).setDoc(esFieldData);
                                 esBulkRequest.add(esUpdateRequest);
                             }
@@ -162,7 +162,7 @@ public class ESEtlService extends AbstractEtlService {
                                     (System.currentTimeMillis() - batchBegin),
                                     (System.currentTimeMillis() - esBatchBegin),
                                     esBulkRequest.numberOfActions(),
-                                    mapping.get_index());
+                                    mapping.getIndex());
                             }
                             batchBegin = System.currentTimeMillis();
                             esBulkRequest.resetBulk();
@@ -182,12 +182,12 @@ public class ESEtlService extends AbstractEtlService {
                                 (System.currentTimeMillis() - batchBegin),
                                 (System.currentTimeMillis() - esBatchBegin),
                                 esBulkRequest.numberOfActions(),
-                                mapping.get_index());
+                                mapping.getIndex());
                         }
                     }
                 } catch (Exception e) {
                     logger.error(e.getMessage(), e);
-                    errMsg.add(mapping.get_index() + " etl failed! ==>" + e.getMessage());
+                    errMsg.add(mapping.getIndex() + " etl failed! ==>" + e.getMessage());
                     throw new RuntimeException(e);
                 }
                 return count;
diff --git a/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/support/ES7xTemplate.java b/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/support/ES7xTemplate.java
index 434cbf9a..4f2ff061 100644
--- a/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/support/ES7xTemplate.java
+++ b/client-adapter/es7x/src/main/java/com/alibaba/otter/canal/client/adapter/es7x/support/ES7xTemplate.java
@@ -66,17 +66,17 @@ public class ES7xTemplate implements ESTemplate {
 
     @Override
     public void insert(ESMapping mapping, Object pkVal, Map<String, Object> esFieldData) {
-        if (mapping.get_id() != null) {
+        if (mapping.getId() != null) {
             String parentVal = (String) esFieldData.remove("$parent_routing");
             if (mapping.isUpsert()) {
-                ESUpdateRequest updateRequest = esConnection.new ES7xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest updateRequest = esConnection.new ES7xUpdateRequest(mapping.getIndex(),
                     pkVal.toString()).setDoc(esFieldData).setDocAsUpsert(true);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     updateRequest.setRouting(parentVal);
                 }
                 getBulk().add(updateRequest);
             } else {
-                ESIndexRequest indexRequest = esConnection.new ES7xIndexRequest(mapping.get_index(), pkVal.toString())
+                ESIndexRequest indexRequest = esConnection.new ES7xIndexRequest(mapping.getIndex(), pkVal.toString())
                     .setSource(esFieldData);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     indexRequest.setRouting(parentVal);
@@ -85,13 +85,13 @@ public class ES7xTemplate implements ESTemplate {
             }
             commitBulk();
         } else {
-            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index())
+            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex())
                 .setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal))
                 .size(10000);
             SearchResponse response = esSearchRequest.getResponse();
 
             for (SearchHit hit : response.getHits()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(mapping.getIndex(),
                     hit.getId()).setDoc(esFieldData);
                 getBulk().add(esUpdateRequest);
                 commitBulk();
@@ -148,18 +148,18 @@ public class ES7xTemplate implements ESTemplate {
 
     @Override
     public void delete(ESMapping mapping, Object pkVal, Map<String, Object> esFieldData) {
-        if (mapping.get_id() != null) {
-            ESDeleteRequest esDeleteRequest = this.esConnection.new ES7xDeleteRequest(mapping.get_index(),
+        if (mapping.getId() != null) {
+            ESDeleteRequest esDeleteRequest = this.esConnection.new ES7xDeleteRequest(mapping.getIndex(),
                 pkVal.toString());
             getBulk().add(esDeleteRequest);
             commitBulk();
         } else {
-            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index())
+            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex())
                 .setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal))
                 .size(10000);
             SearchResponse response = esSearchRequest.getResponse();
             for (SearchHit hit : response.getHits()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(mapping.getIndex(),
                     hit.getId()).setDoc(esFieldData);
                 getBulk().add(esUpdateRequest);
                 commitBulk();
@@ -204,7 +204,7 @@ public class ES7xTemplate implements ESTemplate {
     public Object getESDataFromRS(ESMapping mapping, ResultSet resultSet,
                                   Map<String, Object> esFieldData) throws SQLException {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             Object value = getValFromRS(mapping, resultSet, fieldItem.getFieldName(), fieldItem.getFieldName());
@@ -213,7 +213,7 @@ public class ES7xTemplate implements ESTemplate {
                 resultIdVal = value;
             }
 
-            if (!fieldItem.getFieldName().equals(mapping.get_id())
+            if (!fieldItem.getFieldName().equals(mapping.getId())
                 && !mapping.getSkips().contains(fieldItem.getFieldName())) {
                 esFieldData.put(Util.cleanColumn(fieldItem.getFieldName()), value);
             }
@@ -228,7 +228,7 @@ public class ES7xTemplate implements ESTemplate {
     @Override
     public Object getIdValFromRS(ESMapping mapping, ResultSet resultSet) throws SQLException {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             Object value = getValFromRS(mapping, resultSet, fieldItem.getFieldName(), fieldItem.getFieldName());
@@ -245,7 +245,7 @@ public class ES7xTemplate implements ESTemplate {
     public Object getESDataFromRS(ESMapping mapping, ResultSet resultSet, Map<String, Object> dmlOld,
                                   Map<String, Object> esFieldData) throws SQLException {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             if (fieldItem.getFieldName().equals(idFieldName)) {
@@ -289,7 +289,7 @@ public class ES7xTemplate implements ESTemplate {
     @Override
     public Object getESDataFromDmlData(ESMapping mapping, Map<String, Object> dmlData, Map<String, Object> esFieldData) {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             String columnName = fieldItem.getColumnItems().iterator().next().getColumnName();
@@ -299,7 +299,7 @@ public class ES7xTemplate implements ESTemplate {
                 resultIdVal = value;
             }
 
-            if (!fieldItem.getFieldName().equals(mapping.get_id())
+            if (!fieldItem.getFieldName().equals(mapping.getId())
                 && !mapping.getSkips().contains(fieldItem.getFieldName())) {
                 esFieldData.put(Util.cleanColumn(fieldItem.getFieldName()), value);
             }
@@ -314,7 +314,7 @@ public class ES7xTemplate implements ESTemplate {
     public Object getESDataFromDmlData(ESMapping mapping,String owner, Map<String, Object> dmlData, Map<String, Object> dmlOld,
                                        Map<String, Object> esFieldData) {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             ColumnItem columnItem = fieldItem.getColumnItems().iterator().next();
@@ -348,17 +348,17 @@ public class ES7xTemplate implements ESTemplate {
     }
 
     private void append4Update(ESMapping mapping, Object pkVal, Map<String, Object> esFieldData) {
-        if (mapping.get_id() != null) {
+        if (mapping.getId() != null) {
             String parentVal = (String) esFieldData.remove("$parent_routing");
             if (mapping.isUpsert()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(mapping.getIndex(),
                     pkVal.toString()).setDoc(esFieldData).setDocAsUpsert(true);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     esUpdateRequest.setRouting(parentVal);
                 }
                 getBulk().add(esUpdateRequest);
             } else {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(mapping.getIndex(),
                     pkVal.toString()).setDoc(esFieldData);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     esUpdateRequest.setRouting(parentVal);
@@ -366,12 +366,12 @@ public class ES7xTemplate implements ESTemplate {
                 getBulk().add(esUpdateRequest);
             }
         } else {
-            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index())
+            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex())
                 .setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal))
                 .size(10000);
             SearchResponse response = esSearchRequest.getResponse();
             for (SearchHit hit : response.getHits()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES7xUpdateRequest(mapping.getIndex(),
                     hit.getId()).setDoc(esFieldData);
                 getBulk().add(esUpdateRequest);
             }
@@ -387,15 +387,15 @@ public class ES7xTemplate implements ESTemplate {
      */
     @SuppressWarnings("unchecked")
     private String getEsType(ESMapping mapping, String fieldName) {
-        String key = mapping.get_index() + "-" + mapping.get_type();
+        String key = mapping.getIndex() + "-" + mapping.getType();
         Map<String, String> fieldType = esFieldTypes.get(key);
         if (fieldType != null) {
             return fieldType.get(fieldName);
         } else {
-            MappingMetaData mappingMetaData = esConnection.getMapping(mapping.get_index());
+            MappingMetaData mappingMetaData = esConnection.getMapping(mapping.getIndex());
 
             if (mappingMetaData == null) {
-                throw new IllegalArgumentException("Not found the mapping info of index: " + mapping.get_index());
+                throw new IllegalArgumentException("Not found the mapping info of index: " + mapping.getIndex());
             }
 
             fieldType = new LinkedHashMap<>();
diff --git a/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/ES8xAdapter.java b/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/ES8xAdapter.java
index a972fd99..904a44e4 100644
--- a/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/ES8xAdapter.java
+++ b/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/ES8xAdapter.java
@@ -53,11 +53,11 @@ public class ES8xAdapter extends ESAdapter {
     public Map<String, Object> count(String task) {
         ESSyncConfig config = esSyncConfig.get(task);
         ESSyncConfig.ESMapping mapping = config.getEsMapping();
-        SearchResponse response = this.esConnection.new ESSearchRequest(mapping.get_index()).size(0).getResponse();
+        SearchResponse response = this.esConnection.new ESSearchRequest(mapping.getIndex()).size(0).getResponse();
 
         long rowCount = response.getHits().getTotalHits().value;
         Map<String, Object> res = new LinkedHashMap<>();
-        res.put("esIndex", mapping.get_index());
+        res.put("esIndex", mapping.getIndex());
         res.put("count", rowCount);
         return res;
     }
diff --git a/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/etl/ESEtlService.java b/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/etl/ESEtlService.java
index 5c8464c5..3ec64e95 100644
--- a/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/etl/ESEtlService.java
+++ b/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/etl/ESEtlService.java
@@ -51,7 +51,7 @@ public class ESEtlService extends AbstractEtlService {
 
     public EtlResult importData(List<String> params) {
         ESMapping mapping = config.getEsMapping();
-        logger.info("start etl to import data to index: {}", mapping.get_index());
+        logger.info("start etl to import data to index: {}", mapping.getIndex());
         String sql = mapping.getSql();
         return importData(sql, params);
     }
@@ -78,7 +78,7 @@ public class ESEtlService extends AbstractEtlService {
                             }
 
                             // 如果是主键字段则不插入
-                            if (fieldItem.getFieldName().equals(mapping.get_id())) {
+                            if (fieldItem.getFieldName().equals(mapping.getId())) {
                                 idVal = esTemplate.getValFromRS(mapping, rs, fieldName, fieldName);
                             } else {
                                 Object val = esTemplate.getValFromRS(mapping, rs, fieldName, fieldName);
@@ -118,7 +118,7 @@ public class ESEtlService extends AbstractEtlService {
                             String parentVal = (String) esFieldData.remove("$parent_routing");
                             if (mapping.isUpsert()) {
                                 ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(
-                                    mapping.get_index(),
+                                    mapping.getIndex(),
                                     idVal.toString()).setDoc(esFieldData).setDocAsUpsert(true);
 
                                 if (StringUtils.isNotEmpty(parentVal)) {
@@ -128,7 +128,7 @@ public class ESEtlService extends AbstractEtlService {
                                 esBulkRequest.add(esUpdateRequest);
                             } else {
                                 ESIndexRequest esIndexRequest = this.esConnection.new ES8xIndexRequest(
-                                    mapping.get_index(),
+                                    mapping.getIndex(),
                                     idVal.toString()).setSource(esFieldData);
                                 if (StringUtils.isNotEmpty(parentVal)) {
                                     esIndexRequest.setRouting(parentVal);
@@ -137,13 +137,13 @@ public class ESEtlService extends AbstractEtlService {
                             }
                         } else {
                             idVal = esFieldData.get(mapping.getPk());
-                            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index())
+                            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex())
                                 .setQuery(QueryBuilders.termQuery(mapping.getPk(), idVal))
                                 .size(10000);
                             SearchResponse response = esSearchRequest.getResponse();
                             for (SearchHit hit : response.getHits()) {
                                 ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(
-                                    mapping.get_index(),
+                                    mapping.getIndex(),
                                     hit.getId()).setDoc(esFieldData);
                                 esBulkRequest.add(esUpdateRequest);
                             }
@@ -162,7 +162,7 @@ public class ESEtlService extends AbstractEtlService {
                                     (System.currentTimeMillis() - batchBegin),
                                     (System.currentTimeMillis() - esBatchBegin),
                                     esBulkRequest.numberOfActions(),
-                                    mapping.get_index());
+                                    mapping.getIndex());
                             }
                             batchBegin = System.currentTimeMillis();
                             esBulkRequest.resetBulk();
@@ -182,12 +182,12 @@ public class ESEtlService extends AbstractEtlService {
                                 (System.currentTimeMillis() - batchBegin),
                                 (System.currentTimeMillis() - esBatchBegin),
                                 esBulkRequest.numberOfActions(),
-                                mapping.get_index());
+                                mapping.getIndex());
                         }
                     }
                 } catch (Exception e) {
                     logger.error(e.getMessage(), e);
-                    errMsg.add(mapping.get_index() + " etl failed! ==>" + e.getMessage());
+                    errMsg.add(mapping.getIndex() + " etl failed! ==>" + e.getMessage());
                     throw new RuntimeException(e);
                 }
                 return count;
diff --git a/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/support/ES8xTemplate.java b/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/support/ES8xTemplate.java
index efced987..7f125b7e 100644
--- a/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/support/ES8xTemplate.java
+++ b/client-adapter/es8x/src/main/java/com/alibaba/otter/canal/client/adapter/es8x/support/ES8xTemplate.java
@@ -62,17 +62,17 @@ public class ES8xTemplate implements ESTemplate {
 
     @Override
     public void insert(ESMapping mapping, Object pkVal, Map<String, Object> esFieldData) {
-        if (mapping.get_id() != null) {
+        if (mapping.getId() != null) {
             String parentVal = (String) esFieldData.remove("$parent_routing");
             if (mapping.isUpsert()) {
-                ESUpdateRequest updateRequest = esConnection.new ES8xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest updateRequest = esConnection.new ES8xUpdateRequest(mapping.getIndex(),
                     pkVal.toString()).setDoc(esFieldData).setDocAsUpsert(true);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     updateRequest.setRouting(parentVal);
                 }
                 getBulk().add(updateRequest);
             } else {
-                ESIndexRequest indexRequest = esConnection.new ES8xIndexRequest(mapping.get_index(), pkVal.toString())
+                ESIndexRequest indexRequest = esConnection.new ES8xIndexRequest(mapping.getIndex(), pkVal.toString())
                     .setSource(esFieldData);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     indexRequest.setRouting(parentVal);
@@ -81,13 +81,13 @@ public class ES8xTemplate implements ESTemplate {
             }
             commitBulk();
         } else {
-            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index())
+            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex())
                 .setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal))
                 .size(10000);
             SearchResponse response = esSearchRequest.getResponse();
 
             for (SearchHit hit : response.getHits()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(mapping.getIndex(),
                     hit.getId()).setDoc(esFieldData);
                 getBulk().add(esUpdateRequest);
                 commitBulk();
@@ -144,18 +144,18 @@ public class ES8xTemplate implements ESTemplate {
 
     @Override
     public void delete(ESMapping mapping, Object pkVal, Map<String, Object> esFieldData) {
-        if (mapping.get_id() != null) {
-            ESDeleteRequest esDeleteRequest = this.esConnection.new ES8xDeleteRequest(mapping.get_index(),
+        if (mapping.getId() != null) {
+            ESDeleteRequest esDeleteRequest = this.esConnection.new ES8xDeleteRequest(mapping.getIndex(),
                 pkVal.toString());
             getBulk().add(esDeleteRequest);
             commitBulk();
         } else {
-            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index())
+            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex())
                 .setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal))
                 .size(10000);
             SearchResponse response = esSearchRequest.getResponse();
             for (SearchHit hit : response.getHits()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(mapping.getIndex(),
                     hit.getId()).setDoc(esFieldData);
                 getBulk().add(esUpdateRequest);
                 commitBulk();
@@ -200,7 +200,7 @@ public class ES8xTemplate implements ESTemplate {
     public Object getESDataFromRS(ESMapping mapping, ResultSet resultSet,
                                   Map<String, Object> esFieldData) throws SQLException {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             Object value = getValFromRS(mapping, resultSet, fieldItem.getFieldName(), fieldItem.getFieldName());
@@ -209,7 +209,7 @@ public class ES8xTemplate implements ESTemplate {
                 resultIdVal = value;
             }
 
-            if (!fieldItem.getFieldName().equals(mapping.get_id())
+            if (!fieldItem.getFieldName().equals(mapping.getId())
                 && !mapping.getSkips().contains(fieldItem.getFieldName())) {
                 esFieldData.put(Util.cleanColumn(fieldItem.getFieldName()), value);
             }
@@ -224,7 +224,7 @@ public class ES8xTemplate implements ESTemplate {
     @Override
     public Object getIdValFromRS(ESMapping mapping, ResultSet resultSet) throws SQLException {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             Object value = getValFromRS(mapping, resultSet, fieldItem.getFieldName(), fieldItem.getFieldName());
@@ -241,7 +241,7 @@ public class ES8xTemplate implements ESTemplate {
     public Object getESDataFromRS(ESMapping mapping, ResultSet resultSet, Map<String, Object> dmlOld,
                                   Map<String, Object> esFieldData) throws SQLException {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             if (fieldItem.getFieldName().equals(idFieldName)) {
@@ -286,7 +286,7 @@ public class ES8xTemplate implements ESTemplate {
     public Object getESDataFromDmlData(ESMapping mapping, Map<String, Object> dmlData,
                                        Map<String, Object> esFieldData) {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             String columnName = fieldItem.getColumnItems().iterator().next().getColumnName();
@@ -296,7 +296,7 @@ public class ES8xTemplate implements ESTemplate {
                 resultIdVal = value;
             }
 
-            if (!fieldItem.getFieldName().equals(mapping.get_id())
+            if (!fieldItem.getFieldName().equals(mapping.getId())
                 && !mapping.getSkips().contains(fieldItem.getFieldName())) {
                 esFieldData.put(Util.cleanColumn(fieldItem.getFieldName()), value);
             }
@@ -311,7 +311,7 @@ public class ES8xTemplate implements ESTemplate {
     public Object getESDataFromDmlData(ESMapping mapping, String owner, Map<String, Object> dmlData,
                                        Map<String, Object> dmlOld, Map<String, Object> esFieldData) {
         SchemaItem schemaItem = mapping.getSchemaItem();
-        String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+        String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
         Object resultIdVal = null;
         for (FieldItem fieldItem : schemaItem.getSelectFields().values()) {
             ColumnItem columnItem = fieldItem.getColumnItems().iterator().next();
@@ -345,17 +345,17 @@ public class ES8xTemplate implements ESTemplate {
     }
 
     private void append4Update(ESMapping mapping, Object pkVal, Map<String, Object> esFieldData) {
-        if (mapping.get_id() != null) {
+        if (mapping.getId() != null) {
             String parentVal = (String) esFieldData.remove("$parent_routing");
             if (mapping.isUpsert()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(mapping.getIndex(),
                     pkVal.toString()).setDoc(esFieldData).setDocAsUpsert(true);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     esUpdateRequest.setRouting(parentVal);
                 }
                 getBulk().add(esUpdateRequest);
             } else {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(mapping.getIndex(),
                     pkVal.toString()).setDoc(esFieldData);
                 if (StringUtils.isNotEmpty(parentVal)) {
                     esUpdateRequest.setRouting(parentVal);
@@ -363,12 +363,12 @@ public class ES8xTemplate implements ESTemplate {
                 getBulk().add(esUpdateRequest);
             }
         } else {
-            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.get_index())
+            ESSearchRequest esSearchRequest = this.esConnection.new ESSearchRequest(mapping.getIndex())
                 .setQuery(QueryBuilders.termQuery(mapping.getPk(), pkVal))
                 .size(10000);
             SearchResponse response = esSearchRequest.getResponse();
             for (SearchHit hit : response.getHits()) {
-                ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(mapping.get_index(),
+                ESUpdateRequest esUpdateRequest = this.esConnection.new ES8xUpdateRequest(mapping.getIndex(),
                     hit.getId()).setDoc(esFieldData);
                 getBulk().add(esUpdateRequest);
             }
@@ -384,15 +384,15 @@ public class ES8xTemplate implements ESTemplate {
      */
     @SuppressWarnings("unchecked")
     private String getEsType(ESMapping mapping, String fieldName) {
-        String key = mapping.get_index() + "-" + mapping.get_type();
+        String key = mapping.getIndex() + "-" + mapping.getType();
         Map<String, String> fieldType = esFieldTypes.get(key);
         if (fieldType != null) {
             return fieldType.get(fieldName);
         } else {
-            MappingMetadata mappingMetaData = esConnection.getMapping(mapping.get_index());
+            MappingMetadata mappingMetaData = esConnection.getMapping(mapping.getIndex());
 
             if (mappingMetaData == null) {
-                throw new IllegalArgumentException("Not found the mapping info of index: " + mapping.get_index());
+                throw new IllegalArgumentException("Not found the mapping info of index: " + mapping.getIndex());
             }
 
             fieldType = new LinkedHashMap<>();
diff --git a/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/config/ESSyncConfig.java b/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/config/ESSyncConfig.java
index 1277ebbc..e4c31ba3 100644
--- a/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/config/ESSyncConfig.java
+++ b/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/config/ESSyncConfig.java
@@ -6,6 +6,7 @@ import java.util.List;
 import java.util.Map;
 
 import com.alibaba.otter.canal.client.adapter.support.AdapterConfig;
+import org.springframework.beans.factory.annotation.Value;
 
 /**
  * ES 映射配置
@@ -28,13 +29,13 @@ public class ESSyncConfig implements AdapterConfig {
     private String    esVersion = "es6";
 
     public void validate() {
-        if (esMapping._index == null) {
+        if (esMapping.index == null) {
             throw new NullPointerException("esMapping._index");
         }
-        if ("es6".equals(esVersion) && esMapping._type == null) {
+        if ("es6".equals(esVersion) && esMapping.type == null) {
             throw new NullPointerException("esMapping._type");
         }
-        if (esMapping._id == null && esMapping.getPk() == null) {
+        if (esMapping.id == null && esMapping.getPk() == null) {
             throw new NullPointerException("esMapping._id or esMapping.pk");
         }
         if (esMapping.sql == null) {
@@ -96,9 +97,14 @@ public class ESSyncConfig implements AdapterConfig {
 
     public static class ESMapping implements AdapterMapping {
 
-        private String                       _index;
-        private String                       _type;
-        private String                       _id;
+        @Value("${_index}")
+        private String index;
+
+        @Value("${_type}")
+        private String type;
+
+        @Value("${_id}")
+        private String id;
         private boolean                      upsert          = false;
         private String                       pk;
         private Map<String, RelationMapping> relations       = new LinkedHashMap<>();
@@ -114,28 +120,28 @@ public class ESSyncConfig implements AdapterConfig {
 
         private SchemaItem                   schemaItem;                             // sql解析结果模型
 
-        public String get_index() {
-            return _index;
+        public String getIndex() {
+            return index;
         }
 
-        public void set_index(String _index) {
-            this._index = _index;
+        public void setIndex(String index) {
+            this.index = index;
         }
 
-        public String get_type() {
-            return _type;
+        public String getType() {
+            return type;
         }
 
-        public void set_type(String _type) {
-            this._type = _type;
+        public void setType(String type) {
+            this.type = type;
         }
 
-        public String get_id() {
-            return _id;
+        public String getId() {
+            return id;
         }
 
-        public void set_id(String _id) {
-            this._id = _id;
+        public void setId(String id) {
+            this.id = id;
         }
 
         public boolean isUpsert() {
diff --git a/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/config/SchemaItem.java b/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/config/SchemaItem.java
index 441e440f..550f474b 100644
--- a/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/config/SchemaItem.java
+++ b/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/config/SchemaItem.java
@@ -136,8 +136,8 @@ public class SchemaItem {
     }
 
     public FieldItem getIdFieldItem(ESSyncConfig.ESMapping mapping) {
-        if (mapping.get_id() != null) {
-            return getSelectFields().get(mapping.get_id());
+        if (mapping.getId() != null) {
+            return getSelectFields().get(mapping.getId());
         } else {
             return getSelectFields().get(mapping.getPk());
         }
diff --git a/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/service/ESSyncService.java b/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/service/ESSyncService.java
index e261ec76..4bcb9519 100644
--- a/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/service/ESSyncService.java
+++ b/client-adapter/escore/src/main/java/com/alibaba/otter/canal/client/adapter/es/core/service/ESSyncService.java
@@ -54,13 +54,13 @@ public class ESSyncService {
             for (ESSyncConfig config : esSyncConfigs) {
                 if (logger.isTraceEnabled()) {
                     logger.trace("Prepared to sync index: {}, destination: {}",
-                        config.getEsMapping().get_index(),
+                        config.getEsMapping().getIndex(),
                         dml.getDestination());
                 }
                 this.sync(config, dml);
                 if (logger.isTraceEnabled()) {
                     logger.trace("Sync completed: {}, destination: {}",
-                        config.getEsMapping().get_index(),
+                        config.getEsMapping().getIndex(),
                         dml.getDestination());
                 }
             }
@@ -73,7 +73,7 @@ public class ESSyncService {
             if (logger.isDebugEnabled()) {
                 StringBuilder configIndexes = new StringBuilder();
                 esSyncConfigs
-                    .forEach(esSyncConfig -> configIndexes.append(esSyncConfig.getEsMapping().get_index()).append(" "));
+                    .forEach(esSyncConfig -> configIndexes.append(esSyncConfig.getEsMapping().getIndex()).append(" "));
                 logger.debug("DML: {} \nAffected indexes: {}",
                     JSON.toJSONString(dml, JSONWriter.Feature.WriteNulls),
                     configIndexes.toString());
@@ -105,10 +105,10 @@ public class ESSyncService {
                 logger.trace("Sync elapsed time: {} ms,destination: {}, es index: {}",
                     (System.currentTimeMillis() - begin),
                     dml.getDestination(),
-                    config.getEsMapping().get_index());
+                    config.getEsMapping().getIndex());
             }
         } catch (Throwable e) {
-            logger.error("sync error, es index: {}, DML : {}", config.getEsMapping().get_index(), dml);
+            logger.error("sync error, es index: {}, DML : {}", config.getEsMapping().getIndex(), dml);
             throw new RuntimeException(e);
         }
     }
@@ -210,7 +210,7 @@ public class ESSyncService {
                 // ------主表 查询sql来更新------
                 if (schemaItem.getMainTable().getTableName().equalsIgnoreCase(dml.getTable())) {
                     ESMapping mapping = config.getEsMapping();
-                    String idFieldName = mapping.get_id() == null ? mapping.getPk() : mapping.get_id();
+                    String idFieldName = mapping.getId() == null ? mapping.getPk() : mapping.getId();
                     FieldItem idFieldItem = schemaItem.getSelectFields().get(idFieldName);
 
                     boolean idFieldSimple = true;
@@ -336,7 +336,7 @@ public class ESSyncService {
 
             // ------是主表------
             if (schemaItem.getMainTable().getTableName().equalsIgnoreCase(dml.getTable())) {
-                if (mapping.get_id() != null) {
+                if (mapping.getId() != null) {
                     FieldItem idFieldItem = schemaItem.getIdFieldItem(mapping);
                     // 主键为简单字段
                     if (!idFieldItem.isMethod() && !idFieldItem.isBinaryOp()) {
@@ -349,7 +349,7 @@ public class ESSyncService {
                             logger.trace("Main table delete es index, destination:{}, table: {}, index: {}, id: {}",
                                 config.getDestination(),
                                 dml.getTable(),
-                                mapping.get_index(),
+                                mapping.getIndex(),
                                 idVal);
                         }
                         esTemplate.delete(mapping, idVal, null);
@@ -368,7 +368,7 @@ public class ESSyncService {
                             logger.trace("Main table delete es index, destination:{}, table: {}, index: {}, pk: {}",
                                 config.getDestination(),
                                 dml.getTable(),
-                                mapping.get_index(),
+                                mapping.getIndex(),
                                 pkVal);
                         }
                         esFieldData.remove(pkFieldItem.getFieldName());
@@ -438,7 +438,7 @@ public class ESSyncService {
             logger.trace("Single table insert to es index, destination:{}, table: {}, index: {}, id: {}",
                 config.getDestination(),
                 dml.getTable(),
-                mapping.get_index(),
+                mapping.getIndex(),
                 idVal);
         }
         esTemplate.insert(mapping, idVal, esFieldData);
@@ -461,7 +461,7 @@ public class ESSyncService {
             logger.trace("Main table insert to es index by query sql, destination:{}, table: {}, index: {}, sql: {}",
                 config.getDestination(),
                 dml.getTable(),
-                mapping.get_index(),
+                mapping.getIndex(),
                 sql.replace("\n", " "));
         }
         Util.sqlRS(ds, sql, rs -> {
@@ -475,7 +475,7 @@ public class ESSyncService {
                             "Main table insert to es index by query sql, destination:{}, table: {}, index: {}, id: {}",
                             config.getDestination(),
                             dml.getTable(),
-                            mapping.get_index(),
+                            mapping.getIndex(),
                             idVal);
                     }
                     esTemplate.insert(mapping, idVal, esFieldData);
@@ -497,7 +497,7 @@ public class ESSyncService {
             logger.trace("Main table delete es index by query sql, destination:{}, table: {}, index: {}, sql: {}",
                 config.getDestination(),
                 dml.getTable(),
-                mapping.get_index(),
+                mapping.getIndex(),
                 sql.replace("\n", " "));
         }
         Util.sqlRS(ds, sql, rs -> {
@@ -519,7 +519,7 @@ public class ESSyncService {
                             "Main table delete to es index by query sql, destination:{}, table: {}, index: {}, id: {}",
                             config.getDestination(),
                             dml.getTable(),
-                            mapping.get_index(),
+                            mapping.getIndex(),
                             idVal);
                     }
                     esTemplate.delete(mapping, idVal, esFieldData);
@@ -554,7 +554,7 @@ public class ESSyncService {
 
                     String fieldName = fieldItem.getFieldName();
                     // 判断是否是主键
-                    if (fieldName.equals(mapping.get_id())) {
+                    if (fieldName.equals(mapping.getId())) {
                         fieldName = "_id";
                     }
                     paramsTmp.put(fieldName, value);
@@ -566,7 +566,7 @@ public class ESSyncService {
             logger.trace("Join table update es index by foreign key, destination:{}, table: {}, index: {}",
                 config.getDestination(),
                 dml.getTable(),
-                mapping.get_index());
+                mapping.getIndex());
         }
         esTemplate.updateByQuery(config, paramsTmp, esFieldData);
     }
@@ -617,7 +617,7 @@ public class ESSyncService {
             logger.trace("Join table update es index by query sql, destination:{}, table: {}, index: {}, sql: {}",
                 config.getDestination(),
                 dml.getTable(),
-                mapping.get_index(),
+                mapping.getIndex(),
                 sql.toString().replace("\n", " "));
         }
         Util.sqlRS(ds, sql.toString(), values, rs -> {
@@ -661,7 +661,7 @@ public class ESSyncService {
                                     entry.getKey().getColumn().getColumnName());
                                 String fieldName = fieldItem.getFieldName();
                                 // 判断是否是主键
-                                if (fieldName.equals(mapping.get_id())) {
+                                if (fieldName.equals(mapping.getId())) {
                                     fieldName = "_id";
                                 }
                                 paramsTmp.put(fieldName, value);
@@ -673,7 +673,7 @@ public class ESSyncService {
                         logger.trace("Join table update es index by query sql, destination:{}, table: {}, index: {}",
                             config.getDestination(),
                             dml.getTable(),
-                            mapping.get_index());
+                            mapping.getIndex());
                     }
                     esTemplate.updateByQuery(config, paramsTmp, esFieldData);
                 }
@@ -721,7 +721,7 @@ public class ESSyncService {
             logger.trace("Join table update es index by query whole sql, destination:{}, table: {}, index: {}, sql: {}",
                 config.getDestination(),
                 dml.getTable(),
-                mapping.get_index(),
+                mapping.getIndex(),
                 sql.toString().replace("\n", " "));
         }
         Util.sqlRS(ds, sql.toString(), rs -> {
@@ -775,7 +775,7 @@ public class ESSyncService {
                                 .getValFromRS(mapping, rs, fieldItem.getFieldName(), fieldItem.getFieldName());
                             String fieldName = fieldItem.getFieldName();
                             // 判断是否是主键
-                            if (fieldName.equals(mapping.get_id())) {
+                            if (fieldName.equals(mapping.getId())) {
                                 fieldName = "_id";
                             }
                             paramsTmp.put(fieldName, value);
@@ -787,7 +787,7 @@ public class ESSyncService {
                             "Join table update es index by query whole sql, destination:{}, table: {}, index: {}",
                             config.getDestination(),
                             dml.getTable(),
-                            mapping.get_index());
+                            mapping.getIndex());
                     }
                     esTemplate.updateByQuery(config, paramsTmp, esFieldData);
                 }
@@ -817,7 +817,7 @@ public class ESSyncService {
             logger.trace("Main table update to es index, destination:{}, table: {}, index: {}, id: {}",
                 config.getDestination(),
                 dml.getTable(),
-                mapping.get_index(),
+                mapping.getIndex(),
                 idVal);
         }
         esTemplate.update(mapping, idVal, esFieldData);
@@ -840,7 +840,7 @@ public class ESSyncService {
             logger.trace("Main table update to es index by query sql, destination:{}, table: {}, index: {}, sql: {}",
                 config.getDestination(),
                 dml.getTable(),
-                mapping.get_index(),
+                mapping.getIndex(),
                 sql.replace("\n", " "));
         }
         Util.sqlRS(ds, sql, rs -> {
@@ -854,7 +854,7 @@ public class ESSyncService {
                             "Main table update to es index by query sql, destination:{}, table: {}, index: {}, id: {}",
                             config.getDestination(),
                             dml.getTable(),
-                            mapping.get_index(),
+                            mapping.getIndex(),
                             idVal);
                     }
                     esTemplate.update(mapping, idVal, esFieldData);