layout: post
title: 使用fastjson對JSON、實體類书幕、列表轉(zhuǎn)換
subtitle: 使用fastjson對JSON新荤、實體類、列表轉(zhuǎn)換
date: 2018-11-3
author: LY
header-img: img/post-bg-debug.png
catalog: true
tags:
- java
- ajax
- JSON

在這里小小推薦下我的個人博客

csdn：雷園的csdn博客

個人博客：雷園的個人博客

簡書：雷園的簡書

某寶優(yōu)惠：優(yōu)惠網(wǎng)站

使用fastjson對JSON台汇、實體類苛骨、列表轉(zhuǎn)換

導(dǎo)入jar包或者使用maven添加依賴

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.49</version>
</dependency>

首先我們來寫一個帶有列表的實體類：

package com.entity;

import java.util.List;

public class Teacher {
    private String id;
    private String name;
    private String info;
    private List<Student> studentList;

    public static class Student {
        private String id;
        private String name;
        private String student_num;

        @Override
        public String toString() {
            return "Student{" +
                    "id='" + id + '\'' +
                    ", name='" + name + '\'' +
                    ", student_num='" + student_num + '\'' +
                    '}';
        }

        public String getId() {
            return id;
        }

        public void setId(String id) {
            this.id = id;
        }

        public String getName() {
            return name;
        }

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

        public String getStudent_num() {
            return student_num;
        }

        public void setStudent_num(String student_num) {
            this.student_num = student_num;
        }

        public Student(String id, String name, String student_num) {

            this.id = id;
            this.name = name;
            this.student_num = student_num;
        }
    }

    @Override
    public String toString() {
        return "Teacher{" +
                "id='" + id + '\'' +
                ", name='" + name + '\'' +
                ", info='" + info + '\'' +
                ", studentList=" + studentList +
                '}';
    }

    public String getId() {
        return id;
    }

    public void setId(String id) {
        this.id = id;
    }

    public String getName() {
        return name;
    }

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

    public String getInfo() {
        return info;
    }

    public void setInfo(String info) {
        this.info = info;
    }

    public List<Student> getStudentList() {
        return studentList;
    }

    public void setStudentList(List<Student> studentList) {
        this.studentList = studentList;
    }

    public Teacher(String id, String name, String info, List<Student> studentList) {

        this.id = id;
        this.name = name;
        this.info = info;
        this.studentList = studentList;
    }
}

你收到的JSON數(shù)據(jù)格式如下

{
    "id":"1",
    "name":"your_name",
    "info":"你是一個好老師",
    "studentList":[
        {
            "id":"1",
            "name":"student_name1",
            "student_num":"134233721"
        },
        {
            "id":"2",
            "name":"student_name2",
            "student_num":"134233722"
        },
        {
            "id":"3",
            "name":"student_name3",
            "student_num":"134233723"
        },
        {
            "id":"4",
            "name":"student_name4",
            "student_num":"134233724"
        }
    ]
}

接下來進(jìn)行格式轉(zhuǎn)換

package com.controller;

import com.alibaba.fastjson.JSON;
import com.leiyuan.entity.Teacher;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
@RequestMapping("/test")
public class TestController {

    /**
     * 在這里進(jìn)行轉(zhuǎn)換
     *
     * @param json 假設(shè)json為請求參數(shù)
     */
    @RequestMapping(value = "/transJson", method = RequestMethod.POST)
    public void transJson(@RequestBody String json) {
        System.out.println("原始數(shù)據(jù)==========" + json);
        // 轉(zhuǎn)化為teacher實體類
        Teacher teacher = JSON.parseObject(json, Teacher.class);
        System.out.println("轉(zhuǎn)換為teacher實體類==========" + teacher.toString());
        // 對teacher實體類中的studentList進(jìn)行轉(zhuǎn)換
    }
}

輸出結(jié)果如下

原始數(shù)據(jù)=========={
    "id":"1",
    "name":"your_name",
    "info":"你是一個好老師",
    "studentList":[
        {
            "id":"1",
            "name":"your_name",
            "student_num":"134233721"
        },  
        {
            "id":"2",
            "name":"your_name",
            "student_num":"134233722"
        },
                {
            "id":"3",
            "name":"your_name",
            "student_num":"134233723"
        },
                {
            "id":"4",
            "name":"your_name",
            "student_num":"134233724"
        }
    ]
}
轉(zhuǎn)換為teacher實體類==========Teacher{id='1', name='your_name', info='你是一個好老師', studentList=[Student{id='1', name='your_name', student_num='134233721'}, Student{id='2', name='your_name', student_num='134233722'}, Student{id='3', name='your_name', student_num='134233723'}, Student{id='4', name='your_name', student_num='134233724'}]}

如何將實體類轉(zhuǎn)換為JSON數(shù)據(jù)？

// 直接調(diào)用如下方法
JSON.toJSONString(your_class);