写在开始:一个搬砖程序员的随缘记录

一、SpringBoot项目的搭建

项目搭建传送门：从零开始，SpringBoot项目快速搭建

二、数据库配置

1、新建数据库

在本地mysql数据库新建库，库名：vue_demo，（数据库名字可自行更改，更改完记得在pom.xml中也同步更改）

2、新建用户表

CREATE TABLE `user` (`id` int(11) NOT NULL,`username` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,`password` varchar(255) COLLATE utf8mb4_unicode_ci DEFAULT NULL,PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

三、SpringBoot项目的配置

项目结构

下面是具体文件的代码
pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.5.3</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.cn</groupId><artifactId>vue_demo</artifactId><version>0.0.1-SNAPSHOT</version><name>vue_demo</name><description>Demo project for Spring Boot</description><properties><project.build.sourceEncoding>UTF-8</project.build.sourceEncoding><project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding><java.version>1.8</java.version><skipTests>true</skipTests><druid.version>1.1.10</druid.version><mysql-connector.version>8.0.16</mysql-connector.version><mybatis-plus.version>3.3.2</mybatis-plus.version></properties><dependencies><!--SpringBoot通用依赖模块--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-aop</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><!--SpringBoot校验框架--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-validation</artifactId></dependency><!--集成druid连接池--><dependency><groupId>com.alibaba</groupId><artifactId>druid-spring-boot-starter</artifactId><version>${druid.version}</version></dependency><!--Mysql数据库驱动--><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>${mysql-connector.version}</version></dependency><!--lombok依赖--><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><!--SpringBoot配置处理--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-configuration-processor</artifactId><optional>true</optional></dependency><!--MyBatis Plus 依赖--><dependency><groupId>com.baomidou</groupId><artifactId>mybatis-plus-boot-starter</artifactId><version>${mybatis-plus.version}</version></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId></plugin></plugins></build></project>

返回实体类封装ResultBody
ResultBody.java

package com.cn.vuedemo.entity;/*** 请求** @author demo*/
public class ResultBody<T> {/*** 响应码*/private int code;/*** 消息*/private String message;/*** 数据*/private T data;public ResultBody(int code, String message, T data) {this.code = code;this.message = message;this.data = data;}public ResultBody(String message) {this.code = 200;this.message = message;}public ResultBody(int code, String message) {this.code = code;this.message = message;}public ResultBody(T data) {this.code = 200;this.message = "请求成功";this.data = data;}public ResultBody(int code) {this.code = code;this.message = "请求成功";}public int getCode() {return code;}public void setCode(int code) {this.code = code;}public String getMessage() {return message;}public void setMessage(String message) {this.message = message;}public T getData() {return data;}public void setData(T data) {this.data = data;}
}

用户实体类
User.java

package com.cn.vuedemo.entity;import lombok.Data;/*** @author demo* @date 2023/07/31 11:18*/
@Data
public class User {/*** id* */private Integer id;/*** 账号* */private String username;/*** 密码* */private String password;
}

登录方法入参
LoginReq.java

package com.cn.vuedemo.model.request;import lombok.Data;/*** @author demo* @since 2023/07/31 11:18*/
@Data
public class LoginReq {/*** 账号* */private String username;/*** 密码* */private String password;
}

service
UserService.java

package com.cn.vuedemo.service;import com.cn.vuedemo.entity.User;
import com.cn.vuedemo.model.request.LoginReq;import java.util.List;/*** @author demo* @since 2023/07/31 11:18*/
public interface UserService {/*** 登录** @param loginReq loginReq* @return com.cn.vuedemo.entity.User* @author demo* @since 2023/07/31 11:18*/User login(LoginReq loginReq);
}

service实现
UserServiceImpl.java

package com.cn.vuedemo.service.impl;import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.cn.vuedemo.entity.User;
import com.cn.vuedemo.mapper.UserMapper;
import com.cn.vuedemo.model.request.LoginReq;
import com.cn.vuedemo.service.UserService;
import lombok.RequiredArgsConstructor;
import org.springframework.stereotype.Service;/*** @author demo* @since 2023/07/31 11:18*/
@Service
@RequiredArgsConstructor
public class UserServiceImpl implements UserService {private final UserMapper userMapper;@Overridepublic User login(LoginReq loginReq) {QueryWrapper<User> queryWrapper = new QueryWrapper<>();queryWrapper.lambda().eq(User::getUsername, loginReq.getUsername()).eq(User::getPassword, loginReq.getPassword());User user = userMapper.selectOne(queryWrapper);return user;}
}

mapper
UserMapper.java

package com.cn.vuedemo.mapper;import com.baomidou.mybatisplus.core.mapper.BaseMapper;
import com.cn.vuedemo.entity.User;
import org.apache.ibatis.annotations.Mapper;/*** @author demo* @since 2023/07/31 11:18*/
@Mapper
public interface UserMapper extends BaseMapper<User> {
}

控制层controller
LoginController.java

package com.cn.vuedemo.controller;import com.cn.vuedemo.entity.ResultBody;
import com.cn.vuedemo.entity.User;
import com.cn.vuedemo.model.request.LoginReq;
import com.cn.vuedemo.service.UserService;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;import java.util.List;
import java.util.Objects;/*** @author demo* @date 2023/07/31 11:18*/
@RestController
@Slf4j
@RequestMapping("/user")
@RequiredArgsConstructor
public class LoginController {private final UserService userService;/*** 登陆** @param loginReq loginReq* @return com.cn.vuedemo.entity.ResultBody* @author demo* @since 2023/7/31*/@PostMapping(value = "/login")public ResultBody login(@RequestBody LoginReq loginReq) {log.info("loginReq:" + loginReq);User user = userService.login(loginReq);if (Objects.isNull(user)) {return new ResultBody(500, "密码不正确");}return new ResultBody(user);}
}

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