fastjson 阿里巴巴json使用

- 日理万妓 2022-06-10 09:39 281阅读 0赞

引入jar包 fastjson-1.2.35.jar
    <dependency>
        <groupId>com.alibaba</groupId>
        <artifactId>fastjson</artifactId>
        <version>1.2.35</version>
    </dependency>
    
    代码有注释,详细使用看代码,
    
    
    
    package com.haixing.testFastJson;
    
    import com.alibaba.fastjson.JSON;
    import com.alibaba.fastjson.JSONArray;
    import com.alibaba.fastjson.JSONObject;
    
    import java.util.ArrayList;
    import java.util.Date;
    import java.util.HashMap;
    import java.util.List;
    
    /**
     * Created by xuhaixing on 17-8-15.
     */
    public class TestFastJson {
        public static void main(String[] args) {
            Student stu = new Student();
            stu.setStuId("001");
            stu.setStuName("小花");
            stu.setPassword("001");
            stu.setBirthday(new Date());
    
            HashMap<String, Object> map = new HashMap<>();
            map.put("1",stu);
            map.put("2",stu);
    
            List<Student> list = new ArrayList<Student>();
            list.add(stu);
            list.add(stu);
    
            String json1 = JSON.toJSONString(stu);
            System.out.println(json1);
            //{"age":0,"birthday":1502808058978,"password":"001","stuId":"001","stuName":"小花"}
    
    
    
            String json11 = JSON.toJSONString(stu,true); //带格式
            System.out.println(json11);
            /*{
            "age":0,
                    "birthday":1502808312496,
                    "password":"001",
                    "stuId":"001",
                    "stuName":"小花"
             }*/
    
            String json2 = JSON.toJSONStringWithDateFormat(stu, "yyyy-MM-dd hh-mm-ss"); //带日期格式
            System.out.println(json2);
            //{"age":0,"birthday":"2017-08-16 06-44-14","password":"001","stuId":"001","stuName":"小花"}
    
    
            Object json3 = JSON.toJSON(map);//转换为jsonObject或jsonArray类型
            System.out.println(json3);
            //{"1":{"birthday":1502837054708,"password":"001","stuId":"001","stuName":"小花","age":0},"2":{"birthday":1502837054708,"password":"001","stuId":"001","stuName":"小花","age":0}}
    
            json3 = JSON.toJSON(list);
            System.out.println(json3);
            //[{"birthday":1502837237363,"password":"001","stuId":"001","stuName":"小花","age":0},{"birthday":1502837237363,"password":"001","stuId":"001","stuName":"小花","age":0}]
    
    
            String json = "{
       \"age\":0,\"password\":\"001\",\"stuId\":\"001\",\"stuName\":\"小花\"}";
            Object obj = JSON.parse(json);
            System.out.println(obj);
    
            JSONObject obj2 = JSON.parseObject(json);//把json文本转换为jsonObject
            System.out.println(obj2);
    
            JSONArray obj3 = JSON.parseArray(json3.toString());//把json文本转换为jsonArray
            System.out.println(obj3);
    
            Student stu1 = JSON.parseObject(json, Student.class); //把json转换为对象
            System.out.println(stu1);
    
            List<Student> listStu = JSON.parseArray(json3.toString(), Student.class); //转换为对象集合
            System.out.println(listStu);
    
        }
    }