json 的一些常用例子

需要的包：commons-beanutils-1.8.0.jar  commons-collections.jar  commons-lang.jar  commons-logging.jar   ezmorph-1.0.3.jar    json-lib-2.3-jdk15.jar

 

 package  com;

package com;

 import  java.util.ArrayList;
 import  java.util.HashMap;
 import  java.util.List;
 import  java.util.Map;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

 import  net.sf.json.JSONArray;
 import  net.sf.json.JSONObject;

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

 public   class  Test {
  public   static   void  main(String[] args) {
   Person p1=new  Person();
   p1.setName("张山" );
   p1.setAge("20" );
   Person p2=new  Person();
   p2.setName("李四" );
   p2.setAge("23" );

   List list=new  ArrayList();
   list.add(p1);
   list.add(p2);

   Map map=new  HashMap();
   map.put("aa" ,  "11" );
   map.put("bb" ,  true );
   map.put("cc" ,  new  String[]{ "hong" , "li" });
   JSONArray jaa=JSONArray.fromObject(list);
   JSONArray jam=JSONArray.fromObject(map);
   JSONObject jo=JSONObject.fromObject(map);
   System.out.println(jaa.toString());
   System.out.println(jam.toString());
   System.out.println(jo.toString());

   String str="{\"age\":\"20\",\"name\":\"张山\"},{\"age\":\"23\",\"name\":\"李四\"}" ;
   JSONObject jsonObject = JSONObject.fromObject(str);
   Object obj=JSONObject.toBean(jsonObject);

   System.out.println();

  }
 }

public class Test {
 public static void main(String[] args) {
  Person p1=new Person();
  p1.setName("张山");
  p1.setAge("20");
  Person p2=new Person();
  p2.setName("李四");
  p2.setAge("23");
  
  List list=new ArrayList();
  list.add(p1);
  list.add(p2);
  
  Map map=new HashMap();
  map.put("aa", "11");
  map.put("bb", true);
  map.put("cc", new String[]{"hong","li"});
  JSONArray jaa=JSONArray.fromObject(list);
  JSONArray jam=JSONArray.fromObject(map);
  JSONObject jo=JSONObject.fromObject(map);
  System.out.println(jaa.toString());
  System.out.println(jam.toString());
  System.out.println(jo.toString());
  
  String str="{\"age\":\"20\",\"name\":\"张山\"},{\"age\":\"23\",\"name\":\"李四\"}";
  JSONObject jsonObject = JSONObject.fromObject(str);
  Object obj=JSONObject.toBean(jsonObject);
  
  System.out.println();
  
 }
}

 

遇到的问题

Exception in thread "main" net.sf.json.JSONException: java.lang.NoSuchMethodException: Property 'age' has no getter method in class 'class com.Person'

解决:声明bean为public class xxx,必须是public,我用默认类型(class xxx)都不行