升级rocketmq到4.8.0，并且支持环境变量优先配置 (#3450)

common/src/main/java/com/alibaba/otter/canal/common/utils/PropertiesUtils.java

@@ -0,0 +1,32 @@
+package com.alibaba.otter.canal.common.utils;
+
+
+import org.apache.commons.lang.StringUtils;
+
+import java.util.Properties;
+
+public class PropertiesUtils {
+    public static String getProperty(Properties properties, String key, String defaultValue) {
+        String value = getProperty(properties, key);
+        if (StringUtils.isEmpty(value)) {
+            return defaultValue;
+        } else {
+            return value;
+        }
+    }
+
+    public static String getProperty(Properties properties, String key) {
+        key = StringUtils.trim(key);
+        String value = System.getProperty(key);
+
+        if (value == null) {
+            value = System.getenv(key);
+        }
+
+        if (value == null) {
+            value = properties.getProperty(key);
+        }
+
+        return StringUtils.trim(value);
+    }
+}