fastjson使用实例

package junit.test;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import com.alibaba.fastjson.JSON;

import com.alibaba.fastjson.TypeReference;

/*

* 这里将json的转化和解析都放在一起了，大家可以根据实际需要来转化json字符串和解析json字符串

*/

public class TestFastJson {

static class Person{

private String id ;

private String name;

private int age ;

public Person(){

}

public Person(String id,String name,int age){

this.id=id;

this.name=name;

this.age=age;

}

public String getId() {

return id;

}

public void setId(String id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

@Override

public String toString() {

return "Person [age=" + age + ", id=" + id + ", name=" + name + "]";

}

}

public static void main(String[] args) {

method1();

method2();

method3();

method4();

}

static void method1(){

System.out.println("javabean转化示例开始----------");

Person person = new Person("1","fastjson",1);

//这里将javabean转化成json字符串

String jsonString = JSON.toJSONString(person);

System.out.println(jsonString);

//这里将json字符串转化成javabean对象,

person =JSON.parseObject(jsonString,Person.class);

System.out.println(person.toString());

System.out.println("javabean转化示例结束----------");

}

static void method2(){

System.out.println("List<javabean>转化示例开始----------");

Person person1 = new Person("1","fastjson1",1);

Person person2 = new Person("2","fastjson2",2);

List<Person> persons = new ArrayList<Person>();

persons.add(person1);

persons.add(person2);

String jsonString = JSON.toJSONString(persons);

System.out.println("json字符串:"+jsonString);

//解析json字符串

List<Person> persons2 = JSON.parseArray(jsonString,Person.class);

//输出解析后的person对象，也可以通过调试模式查看persons2的结构

System.out.println("person1对象："+persons2.get(0).toString());

System.out.println("person2对象："+persons2.get(1).toString());

System.out.println("List<javabean>转化示例结束----------");

}

static void method3(){

System.out.println("List<String>转化示例开始----------");

List<String> list = new ArrayList<String>();

list.add("fastjson1");

list.add("fastjson2");

list.add("fastjson3");

String jsonString = JSON.toJSONString(list);

System.out.println("json字符串:"+jsonString);

//解析json字符串

List<String> list2 = JSON.parseObject(jsonString,new TypeReference<List<String>>(){});

System.out.println(list2.get(0)+"::"+list2.get(1)+"::"+list2.get(2));

System.out.println("List<String>转化示例结束----------");

}

static void method4(){

System.out.println(" List<Map<String,Object>>转化示例开始 ----------");

Map<String,Object> map = new HashMap<String,Object>();

map.put("key1", "value1");

map.put("key2", "value2");

Map<String,Object> map2 = new HashMap<String,Object>();

map2.put("key1", 1);

map2.put("key2", 2);

List<Map<String,Object>> list = new ArrayList<Map<String,Object>>();

list.add(map);

list.add(map2);

String jsonString = JSON.toJSONString(list);

System.out.println("json字符串:"+jsonString);

//解析json字符串

List<Map<String,Object>> list2 = JSON.parseObject(jsonString,new TypeReference<List<Map<String,Object>>>(){});

System.out.println("map的key1值"+list2.get(0).get("key1"));

System.out.println("map的key2值"+list2.get(0).get("key2"));

System.out.println("ma2p的key1值"+list2.get(1).get("key1"));

System.out.println("map2的key2值"+list2.get(1).get("key2"));

}

}

地址： http://download.csdn.net/category