String result = "{\"code\":\"0\",\"data\":{\"status\":1,\"custinsId\":50,\"insName\":\"wwg\"}}";
    JSONObject jsonObject = JSONObject.fromObject(result);
    XMLSerializer serializer = new XMLSerializer(); 
    serializer.setRootName("SampleJSON");
    serializer.setTypeHintsEnabled(false);
    serializer.setForceTopLevelObject(true);
    serializer.setTypeHintsCompatibility(false);
    String xml = serializer.write( jsonObject );  
    System.out.println(xml);   
运行结果是
<SampleJSON><code>0</code><data><custinsId>50</custinsId><insName>wwg</insName><status>1</status></data></SampleJSON>我想要的结果是
<SampleJSON><code>0</code><data><status>1</status><custinsId>50</custinsId><insName>wwg</insName></data></SampleJSON>
注:所用的jar包: 
json-lib-2.4-jdk15.jar
commons-io-1.3.2.jar
xom-1.1.jar