java中list数组转json数组例子

public class TestListTojson {
 public static void main(String[] args) {
  
  //[{"title":"中国好声音"},{title:"中国移动网上营业厅"},{title:"中国银行"},{title:"中国移动"},{title:"中国好声音第三期"},{title:"中国好声音 第一期"},{title:"中国电信网上营业厅"},{title:"中国工商银行"},{title:"中国好声音第二期"},{title:"中国地图"}]
  
  JSONArray array=new JSONArray();
  ArrayList<String> list=new ArrayList<String>();
  list.add("中国好声音");
  list.add("中国好声音1");
  list.add("中国好声音2");
  list.add("中国好声音3");
  for (String string : list) {
   JSONObject json= new JSONObject();
   json.put("title", string);
   array.add(json);
  }
  System.out.println(array.toString());
  
 }

}

import java.util.Date;

public class Person {
 
 String id;
 int age;
 String name;
 Date birthday;
 public String getId() {
  return id;
 }
 public void setId(String id) {
  this.id = id;
 }
 public int getAge() {
  return age;
 }
 public void setAge(int age) {
  this.age = age;
 }
 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public Date getBirthday() {
  return birthday;
 }
 public void setBirthday(Date birthday) {
  this.birthday = birthday;
 }
 
}
 

package hb;

import java.util.Iterator;
import java.util.List;

import org.junit.Test;

import net.sf.json.JSONArray;
import net.sf.json.JsonConfig;

public class JsonToList {

 public static void main(String[] args) {
  String json="[{'name':'huangbiao','age':15},{'name':'liumei','age':14}]";
  JSONArray jsonarray = JSONArray.fromObject(json);
  System.out.println(jsonarray);
  List list = (List)JSONArray.toCollection(jsonarray, Person.class);
  Iterator it = list.iterator();
  while(it.hasNext()){
   Person p = (Person)it.next();
   System.out.println(p.getAge());
  }
 }
 
 @Test
 public void jsonToList1(){
  String json="[{'name':'huangbiao','age':15},{'name':'liumei','age':14}]";
  JSONArray jsonarray = JSONArray.fromObject(json);
  System.out.println(jsonarray);
  List list = (List)JSONArray.toList(jsonarray, Person.class);
  Iterator it = list.iterator();
  while(it.hasNext()){
   Person p = (Person)it.next();
   System.out.println(p.getAge());
  }
  
 }
 
 @Test
 public void jsonToList2(){
  String json="[{'name':'huangbiao','age':15},{'name':'liumei','age':14}]";
  JSONArray jsonarray = JSONArray.fromObject(json);
  System.out.println(jsonarray);
  System.out.println("------------");
  List list = (List)JSONArray.toList(jsonarray, new Person(), new JsonConfig());
  Iterator it = list.iterator();
  while(it.hasNext()){
   Person p = (Person)it.next();
   System.out.println(p.getAge());
  }
  
 }

}
 

import java.util.LinkedList;
import java.util.List;

import net.sf.json.JSONArray;

public class ListToJson {

 public static void main(String[] args) {
  List list = new LinkedList();
  for(int i=0;i<3;i++){
   Person p = new Person();
   p.setAge(i);
   p.setName("name"+i);
   list.add(p);
  }
  JSONArray jsonarray = JSONArray.fromObject(list);
  System.out.println(jsonarray);
 }

}
 打印结果

Java代码 
1.[{"age":0,"birthday":null,"id":"","name":"name0"},{"age":1,"birthday":null,"id":"","name":"name1"},{"age":2,"birthday":null,"id":"","name":"name2"}]