使用SpringBoot+Mybatis—plus来开发后端登陆注册的功能（附有详细代码）

た入场券 2024-04-08 11:32 52阅读 0赞

> 本项目主要实现登陆注册，以及查询的接口

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## 前言 ##

本项目主要使用SpringBoot整合MyBatis-Plus来进行开发，采用Restful开发风格，并整合swagger2，本项目比较简单，只是简单实现了登陆注册以及几个查询的接口，代码简洁精炼，对数据返回体也进行了封装，添加了基本是用到的拦截器，配置了常用的异常处理类。

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## 一、postman测试 ##

### 1.注册测试 ###

![52d1e9025d1e4faa9ca3d94c46cdc1df.png][]

当我们注册成功后，再次点击注册时，会提示用户名已存在

![0076692ff7c54ab783fb25d1937738ca.png][]

### 2.登录测试 ###

![74dc1455249044329461cff024730582.png][]

### 3.查询测试 ###

**查询全部**

![84d8ad829f62465284477a6cb7eb22b6.png][]

**按类别查询**

![3c3a2a0ea49441d3bb5bad963dd2a45e.png][]

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## 二、主要代码详情 ##

### 1.服务层代码`` ###

package com.example.demo.service.impl;
    
    import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
    import com.example.demo.controller.Result;
    import com.example.demo.dao.UserDao;
    import com.example.demo.domin.User;
    import com.example.demo.service.UserService;
    import com.example.demo.utils.Createtoken;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    @Service
    public class UserServiceImpl implements UserService {
        @Autowired
        UserDao userDao;
    
        @Override
        public Result login(String username, String password) {
            User user1 = userDao.selectOne(new QueryWrapper<User>().eq("username",username)
                    .eq("password",password));
            if (user1 != null){
                String token = Createtoken.getToken(user1);
                user1.setToken(token);
                userDao.updateById(user1);
                return new Result(200,user1,"登陆成功！");
            }else {
                return new Result(200,null,"用户名或密码错误！");
            }
        }
    
        @Override
        public Result register(String username, String password) {
            User user1 = userDao.selectOne(new QueryWrapper<User>().eq("username",username));
            if (user1 == null){
                User user = new User(username,password);
                int i = userDao.insert(user);
                if (i == 1){
                    return new Result(200,user,"注册成功！");
                }else {
                    return new Result(400,user,"注册失败，请检查网络！");
                }
            }else {
                return new Result(500,null,"用户名已经存在");
            }
        }
    
        //测试
        @Override
        public Result test(String token) {
            User user = userDao.selectOne(new QueryWrapper<User>().eq("token",token));
            if (user != null){
                return new Result(200,null,"访问成功！");
            }else {
                return new Result(500,null,"您没有权限");
            }
        }
    }

package com.example.demo.service.impl;
    
    import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
    import com.example.demo.controller.Result;
    import com.example.demo.dao.ImageDao;
    import com.example.demo.dao.UserDao;
    import com.example.demo.domin.Image;
    import com.example.demo.domin.User;
    import com.example.demo.service.ImageService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import java.util.List;
    @Service
    public class ImageServiceImpl implements ImageService {
        @Autowired
        ImageDao imageDao;
    
        @Autowired
        UserDao userDao;
    
        @Override
        public Result getImage(String token) {
            User user = userDao.selectOne(new QueryWrapper<User>().eq("token", token));
            if (user != null){
                List<Image> images = imageDao.selectList(null);
                return new Result(200,images,"查询成功！");
            }else {
                return new Result(400,null,"您没有相关权限！");
            }
        }
    
    
        @Override
        public Result getImageByKind(String token,int kinds) {
            User user = userDao.selectOne(new QueryWrapper<User>().eq("token", token));
            if (user != null){
    //            List<Image> images = imageDao.selectList(new QueryWrapper<Image>().eq("kinds", kinds));
    //            return new Result(200,images,"查询成功！");
                List<Image> kinds2 = imageDao.selectList(new QueryWrapper<Image>().eq("kinds", kinds));
                if (!kinds2.isEmpty()){
                    return new Result(200,kinds2,"查询成功！");
                }else {
                    return new Result(200,null,"暂无该种类数据！");
                }
            }else {
                return new Result(400,null,"您没有相关权限！");
            }
        }
    }

### 2.表现层代码 ###

package com.example.demo.controller;
    
    import com.example.demo.service.UserService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.*;
    
    @RestController
    @RequestMapping("/users")
    public class UserController {
        @Autowired
        UserService userService;
    
        //登录接口
        @PostMapping
        public Result login(@RequestParam String username,@RequestParam String password){
            return userService.login(username,password);
        }
    
        //注册接口
        @PutMapping
        public Result register(@RequestParam String username,@RequestParam String password){
            return userService.register(username,password);
        }
    
        //测试token接口
        @GetMapping
        public Result test(@RequestParam String token){
            return userService.test(token);
        }
    }

package com.example.demo.controller;
    
    
    import com.example.demo.service.ImageService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.web.bind.annotation.*;
    
    @RestController
    @RequestMapping("/image")
    public class ImageController {
        @Autowired
        ImageService imageService;
    
        //查询全部图片列表接口
        @GetMapping
        public Result getImage(@RequestParam String token){
            return imageService.getImage(token);
        }
    
        //按种类进行查询图片
        @PostMapping
        public Result getImageById(@RequestParam String token,@RequestParam int kinds){
            return imageService.getImageByKind(token,kinds);
        }
    
    }

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## 总结 ##

## 后端代码比较简单，在这里就不详细介绍了，有需要源码的请自行下载，源码已上传，地址：[本项目主要使用SpringBoot整合MyBatis-Plus来进行开发-Java文档类资源-CSDN下载][SpringBoot_MyBatis-Plus_-Java_-CSDN] ##

## 源码免费，免费的！！！可以直接下载，如果你觉得能够帮助你的话，点个赞！！！！ ##

[52d1e9025d1e4faa9ca3d94c46cdc1df.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/08/fbbf6b2c0598431cb1270890a8bf6007.png
[0076692ff7c54ab783fb25d1937738ca.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/08/620643ea32de492cb57ec27e41b3752e.png
[74dc1455249044329461cff024730582.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/08/869a299183db4a6ea024ea11de87ae87.png
[84d8ad829f62465284477a6cb7eb22b6.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/08/bc9774720d184af7a39d1f6b7a9f0f9d.png
[3c3a2a0ea49441d3bb5bad963dd2a45e.png]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/08/82189e10fe374f60b24daf78837af56c.png
[SpringBoot_MyBatis-Plus_-Java_-CSDN]: https://download.csdn.net/download/m0_58941767/86438677