1.引入pom依赖

<dependency>
    <groupId>org.json</groupId>
    <artifactId>json</artifactId>
    <version>20180130</version>
</dependency>

2.需要转换的xml代码示例

<?xml version="1.0" encoding="utf-8" ?>
	<returnsms>
			 <returnstatus>Success</returnstatus>
			 <message>ok</message>
			 <remainpoint>9118</remainpoint>
			 <taskID>4197401</taskID>
			 <successCounts>1</successCounts>
	 </returnsms>

3.java 代码并取值

org.json.JSONObject object = XML.toJSONObject(result);
 	//xml根节点
   String jsonData = object.get("returnsms").toString();
   //转换成json对象
   JSONObject jsonObject = JSON.parseObject(jsonData);
   //取出对应的value
   String message = jsonObject.getString("message");