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"}]