fastJson常用方法

package com.example.demo.json;


import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;
import com.alibaba.fastjson.serializer.SerializerFeature;
import lombok.var;
import org.junit.Test;

import java.util.ArrayList;
import java.util.List;

public class FastJson01 {

    @Test
    public void test() {
        Student student = new Student(1,"张山","男","我是一个大明星");
        System.out.println(JSON.toJSONString(student));
        System.out.println(JSON.toJSONString(student,true));
    }

    @Test
    public void test2() {
        Student student = new Student(1,"张山","男","我是一个大明星");
        System.out.println(JSON.toJSONString(student,SerializerFeature.PrettyFormat));

    }

    @Test
    public void test3() {
        Student student = new Student(1,"张山","男","");
        String jsonStr = JSON.toJSONString(student,SerializerFeature.PrettyFormat,
                                                   SerializerFeature.WriteMapNullValue);
        System.out.println(jsonStr);

    }
    @Test
    public void test4() {
        Student student = new Student(1,"张山","男","");
        String jsonStr = JSON.toJSONString(student,SerializerFeature.PrettyFormat,
                SerializerFeature.WriteMapNullValue,
                SerializerFeature.WriteNullStringAsEmpty
                );
        System.out.println(jsonStr);

        //TODO json 在转回对象
        var stu = JSON.parseObject(jsonStr,Student.class);
        System.out.println(stu);//Student(age=1, name=张山, sex=男, desc=)

        Integer age = stu.getAge();
        System.out.println("age = " + age);

    }


    @Test
    public void test5() {
        List list = new ArrayList();

        Student student = new Student(1,"张山","男","11");
        Student student2 = new Student(1,"张山","男","11");
        list.add(student);
        list.add(student2);
        // TODO 集合装json格式的集合
        JSONArray jsonStudentList= JSONArray.parseArray(JSON.toJSONString(list));
        //System.out.printf("jsonStudentList"+jsonStudentList);

        // TODO  JSON集合---》对象集合
        List list2 = JSONObject.parseArray(jsonStudentList.toJSONString(), Student.class);
        //list2.forEach(System.out::println);
        //System.out.printf("list2"+list2.toString());

    }

    @Test
    public void test6() {
//
//        String str = "abc";
//        List list = JSONObject.parseArray(str, String.class);
//
//        System.out.println(list);
    }

}

 

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测试类

package com.example.demo.json;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;


@NoArgsConstructor
@AllArgsConstructor
@Data
public class Student {

    private Integer age;
    private String name;
    private String sex;
    private String desc;

   //private Data birthday;







}