Java：Hutool工具箱之hutool-jsonJSON数据读取转换处理

Posted 2022-11-29

文档

• https://hutool.cn/docs/#/json/概述

依赖

<dependency>
    <groupId>cn.hutool</groupId>
    <artifactId>hutool-json</artifactId>
    <version>5.8.10</version>
</dependency>

为了避免字符串中各种转义字符，我们采用直接从文件中读取json字符串的方式

data.json

  "name": "Tom",
  "age": 23

实体类

package com.github.mouday.demo;

public class User 
    private String name;

    private Integer age;

    public User(String name, Integer age) 
        this.name = name;
        this.age = age;
    

    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;
    

使用示例

package com.github.mouday.demo;

import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;

import java.io.File;
import java.nio.charset.Charset;

public class Demo 
    public static void main(String[] args) 

        JSONObject json = JSONUtil.readJSONObject(new File("./data.json"), Charset.forName("utf-8"));

        User user = json.toBean(User.class);

        System.out.println(user.getName()); // Tom
        System.out.println(user.getAge()); // 23