使用fastjson进行转换

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("","fastjson",);

        //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("","fastjson1",);

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

        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().toString());

        System.out.println("person2对象："+persons2.get().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()+"::"+list2.get()+"::"+list2.get());

        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", );

        map2.put("key2", );

        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().get("key1"));

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

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

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

    }

}