使用实例

fastJson 坐标

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.39</version>
</dependency>

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;  

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----------");  
    }  
}