json数组和List转换

使用的是json-lib.jar包

将json格式的字符数组转为List对象

package hb;

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());
        }

    }

}

将list对象转为JSON字符串数组

package hb;

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

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