XML转JSON工具类

原文地址：http://blog.csdn.net/lovesummerforever/article/details/26396465

1.pom依赖

        <dependency>
            <groupId>org.jdom</groupId>
            <artifactId>jdom</artifactId>
            <version>2.0.2</version>
        </dependency>
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.39</version>
        </dependency>

2.代码

 public class Xml2JsonUtil { 

     /**
      * 转换一个xml格式的字符串到json格式
      *
      * @param xml
      *            xml格式的字符串
      * @return 成功返回json 格式的字符串;失败反回null
      */
     public static  String xml2JSON(String xml) {
         JSONObject obj = new JSONObject();
         try {
             InputStream is = new ByteArrayInputStream(xml.getBytes("utf-8"));
             SAXBuilder sb = new SAXBuilder();
             Document doc = sb.build(is);
             Element root = doc.getRootElement();
             obj.put(root.getName(), iterateElement(root));
             return obj.toString();
         } catch (Exception e) {
             e.printStackTrace();
             return null;
         }
     }  

     /**
      * 转换一个xml格式的字符串到json格式
      *
      * @param file
      *            java.io.File实例是一个有效的xml文件
      * @return 成功反回json 格式的字符串;失败反回null
      */
     public static String xml2JSON(File file) {
         JSONObject obj = new JSONObject();
         try {
             SAXBuilder sb = new SAXBuilder();
             Document doc = sb.build(file);
             Element root = doc.getRootElement();
             obj.put(root.getName(), iterateElement(root));
             return obj.toString();
         } catch (Exception e) {
             e.printStackTrace();
             return null;
         }
     }  

     /**
      * 一个迭代方法
      *
      * @param element
      *            : org.jdom.Element
      * @return java.util.Map 实例
      */
     @SuppressWarnings({ "rawtypes", "unchecked" })
     private static Map  iterateElement(Element element) {
         List jiedian = element.getChildren();
         Element et = null;
         Map obj = new HashMap();
         List list = null;
         for (int i = 0; i < jiedian.size(); i++) {
             list = new LinkedList();
             et = (Element) jiedian.get(i);
             if (et.getTextTrim().equals("")) {
                 if (et.getChildren().size() == 0)
                     continue;
                 if (obj.containsKey(et.getName())) {
                     list = (List) obj.get(et.getName());
                 }
                 list.add(iterateElement(et));
                 obj.put(et.getName(), list);
             } else {
                 if (obj.containsKey(et.getName())) {
                     list = (List) obj.get(et.getName());
                 }
                 list.add(et.getTextTrim());
                 obj.put(et.getName(), list);
             }
         }
         return obj;
     }

     // 测试
     public static void main(String[] args) {
         String xml  = "<xml><version><![CDATA[2.0]]></version><charset><![CDATA[UTF-8]]></charset><status><![CDATA[400]]></status><message><![CDATA[Require POST method]]></message></xml>";
         System.out.println(Xml2JsonUtil.xml2JSON(xml));
     }
 }  

3.运行结果（手动格式化了的）

{
    "xml":{
        "charset":[
            "UTF-8"
        ],
        "message":[
            "Require POST method"
        ],
        "version":[
            "2.0"
        ],
        "status":[
            "400"
        ]
    }
}