Java JSON字符串相关问题

一、依赖包

    <!--json包-->
    <dependency>
      <groupId>com.alibaba</groupId>
      <artifactId>fastjson</artifactId>
      <version>1.2.15</version>
    </dependency>

二、举例

1.实体对象转Json字符串

1.1 代码实现

Dog.java:

package com.xj.entity;

/**
 * @Author: xjfu
 * @Create: 2024/03/29 15:58
 * @Description: 狗实体类
 */
public class Dog {

    //姓名
    private String name;
    //品种
    private String kind;
    //年龄
    private Integer age;

    public String getKind() {
        return kind;
    }

    public void setKind(String kind) {
        this.kind = kind;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public Integer getAge() {
        return age;
    }

    public void setAge(Integer age) {
        this.age = age;
    }
}

FastJsonUtil.java:

package com.xj.util;

import com.alibaba.fastjson.JSON;
import com.xj.entity.Dog;

/**
 * @Author: xjfu
 * @Create: 2024/03/29 16:03
 * @Description: 基于com.alibaba.fastjson的工具类
 */
public class FastJsonUtil {

    public static void main(String[] args) {
        System.out.println("将实体转成json字符串:" + entityToString());
    }

    /**
     * 将实体类转成json字符串
     * @return
     */
    public static String entityToString(){

        Dog dog = new Dog();
        dog.setName("小白");
        dog.setKind("中华田园犬");
        dog.setAge(19);

        //将dog转成Json字符串
        return JSON.toJSONString(dog);
    }
}