java中json与对象互相转换

json与对象互相转换

1.引入pom

这里引入阿里的jar包

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.47</version>
</dependency>

2.转换代码

Book实体:

package com.email.demo.bean;

import lombok.Data;

@Data
public class Book {
    
    

    private Integer id;
    private Double price;
    private String description;
    private Float weight;
}

主程序方法:

package com.email.demo.controller;

import com.alibaba.fastjson.JSON;
import com.email.demo.bean.Book;

public class JsonToObject {
    
    

    public static void main(String[] args) {
    
    

        Book book = new Book();
        book.setId(1);
        book.setPrice(125D);
        book.setDescription("书本");
        book.setWeight(10.5F);

        // 将对象转换为json
        String json = JSON.toJSONString(book);
        System.out.println(json);

        Book book1 = jsonToObject(json);
        System.out.println(book1);
    }

    /**
     * 将json转换为对象
     * @param json
     * @return
     */
    private static Book jsonToObject(String json){
    
    

        Book book = JSON.parseObject(json, Book.class);
        return book;
    }
}

3.打印结果

转换是OK的!!
欢迎大佬们留言评论,共同学习!!!感谢!!!

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