Introduction to commonly used scenarios of FastJson (code)

This article brings you an introduction (code) to commonly used scenarios in FastJson. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to you.

JavaBean

package com.daily.json;

import com.alibaba.fastjson.annotation.JSONField;

import java.util.Date;

public class Student {

    @JSONField(name = "NAME", ordinal = 3)
    private String name;
    @JSONField(ordinal = 2)
    private int age;
    @JSONField(format = "yyyy-MM-dd HH:mm:ss", ordinal = 1)
    private Date birthDay;
    @JSONField(serialize = false)
    private String addr;

    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;
    }

    public Date getBirthDay() {
        return birthDay;
    }

    public void setBirthDay(Date birthDay) {
        this.birthDay = birthDay;
    }

    public String getAddr() {
        return addr;
    }

    public void setAddr(String addr) {
        this.addr = addr;
    }
}

Test Class

package com.daily.json;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import com.alibaba.fastjson.serializer.PropertyFilter;

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

public class TestFastJson {

    private static Student student;
    private static List<Student> studentList;
    static {
        student = new Student();
        student.setName("张三");
        student.setAge(18);
        student.setBirthDay(new Date());
        student.setAddr("湖南");

        studentList = new ArrayList<>();
        studentList.add(student);
        studentList.add(student);
    }

    private static PropertyFilter propertyFilter = (object, name, value) -> {
        if (name.equals("age") && value.equals(18)) {
                return false;
        }
        return true;
    };

    public static void main(String[] args) {
        String studentStr = JSON.toJSONString(student);
        //转对象
        Student student1 = JSON.parseObject(studentStr, Student.class);
        Student student2 = JSON.parseObject(studentStr, new TypeReference<Student>() {});
        //转集合
        String studentListStr = JSON.toJSONString(studentList);
        List<Student> students = JSON.parseArray(studentListStr, Student.class);
        List<Student> students2 = JSON.parseObject(studentListStr, new TypeReference<List<Student>>() {
        });
        //过滤字段，默认过滤null
        String student3 = JSON.toJSONString(student, propertyFilter);
        System.out.println(student3);
    }
}

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