解决使用json-lib包实现xml转json时空值被转为空中括号的问题

JSON json =xmlSerializer.read(xml);

json.get(value) instanceof String ? json.getString(value):"" 

org.json.JSONObject jsonObj = org.json.XML.toJSONObject(xml); 

jsonObj.get("root"); 

package com.pptv.ppvision.util; 
 
import org.json.XML; 
import net.sf.json.JSONObject; 
import net.sf.json.xml.XMLSerializer; 
 
public class Xml2JsonTest { 
  private static String xml = "<root><user><name>weless</name><sex></sex></user></root>"; 
  public static void main(String[] args) { 
    testOrgJSon(); 
    testXmlSerializer(); 
  } 
   
  public static void testOrgJSon(){ 
    org.json.JSONObject jsonObj = XML.toJSONObject(xml); 
    System.out.println("org.json xml2json:"+jsonObj); 
    org.json.JSONObject user = jsonObj.getJSONObject("root").getJSONObject("user");//org.json需去除根标签 
    System.out.println("用户名："+user.getString("name")); 
    System.out.println("性别:"+user.getString("sex")); 
  } 
   
  public static void testXmlSerializer(){ 
    XMLSerializer xmlSerializer = new XMLSerializer(); 
    JSONObject jsonObject = (JSONObject)xmlSerializer.read(xml); 
    System.out.println("json-lib xml2json result: "+jsonObject); 
    JSONObject user = jsonObject.getJSONObject("user"); 
    System.out.println("用户名:"+user.get("name")); 
    System.out.println("性别:"+(user.get("sex") instanceof String ? user.getString("sex"):"")); 
  } 
}