feat: 增加 MySQL Connector/J 5.1 XADataSource 的支持 (#627)

dynamic-datasource-creator/src/main/java/com/baomidou/dynamic/datasource/enums/XADataSourceEnum.java

@@ -24,6 +24,10 @@ import lombok.Getter;
  */
 @Getter
 public enum XADataSourceEnum {
+    /**
+     * <a href="https://dev.mysql.com/doc/connector-j/en/connector-j-api-changes.html">MySQL Connector/J 5.1 使用老的 MysqlXADataSource</a>
+     */
+    MYSQL_CONNECTOR_J_5("com.mysql.jdbc.jdbc2.optional.MysqlXADataSource"),
     /**
      * mysql
      */
@@ -69,4 +73,4 @@ public enum XADataSourceEnum {
         }
         return false;
     }
-}
+}