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