完整代码下载地址：/download/qq_35207086/87680396
第一步：建立简单的项目
第二步：建一个简单的数据表
第三步：配置文件如下：
pom.xml文件配置：
<?xml version="1.0" encoding="UTF-8"?><project xmlns="/POM/4.0.0" xmlns:xsi="/2001/XMLSchema-instance"xsi:schemaLocation="/POM/4.0.0 /xsd/maven-4.0.0.xsd"><modelVersion>4.0.0</modelVersion><parent><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-parent</artifactId><version>2.4.5</version><relativePath/> <!-- lookup parent from repository --></parent><groupId>com.wei</groupId><artifactId>demo01</artifactId><version>0.0.1-SNAPSHOT</version><name>demo01</name><description>Demo project for Spring Boot</description><properties><java.version>1.8</java.version></properties><dependencies><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-jdbc</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-thymeleaf</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.mybatis.spring.boot</groupId><artifactId>mybatis-spring-boot-starter</artifactId><version>2.1.0</version></dependency><dependency><groupId>mysql</groupId><artifactId>mysql-connector-java</artifactId><version>8.0.24</version><scope>runtime</scope></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency><dependency><groupId>junit</groupId><artifactId>junit</artifactId><scope>test</scope></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency></dependencies><build><plugins><plugin><groupId>org.springframework.boot</groupId><artifactId>spring-boot-maven-plugin</artifactId><configuration><excludes><exclude><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId></exclude></excludes></configuration></plugin></plugins></build></project>
application.properties文件配置：
#改变端口号:server.port=8080#给整个项目加个前缀,多个项目就不会重复：#server.servlet.context-path=/first#school.grade=3#school.classNum=4spring.datasource.driver-class-name=com.mysql.cj.jdbc.Driverspring.datasource.password=rootspring.datasource.username=rootspring.datasource.url=jdbc:mysql://localhost:3306/demo?serverTimezone=UTC&useUnicode=true&characterEncoding=utf-8&useSSL=truespring.thymeleaf.prefix=classpath:/templates/#mapper.mappers=tk.mon.Mapper#mapper.not-empty=true
项目目录如下：
LoginController.java文件：
注意：@Controller只能用这个，不能用@RestController
package com.wei.demo01.controller;import com.wei.demo01.entity.UserBean;import com.wei.demo01.service.UserService;import lombok.extern.slf4j.Slf4j;import org.springframework.stereotype.Controller;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.RequestMapping;import org.springframework.web.bind.annotation.RequestMethod;import javax.annotation.Resource;@Slf4j@Controllerpublic class LoginController {//将Service注入Web层@ResourceUserService userService;//实现登录@RequestMapping("/login")public String show(){return "login";}@RequestMapping(value = "/loginIn",method = RequestMethod.POST)public String login(String name,String password){UserBean userBean = userService.LoginIn(name, password);log.info("name:{}",name);log.info("password:{}",password);if(userBean!=null){return "success";}else {return "error";}}@RequestMapping("/signup")public String disp(){return "signup";}//实现注册功能@RequestMapping(value = "/register",method = RequestMethod.POST)public String signUp(String name,String password){userService.Insert(name, password);return "success";}}
UserBean.java文件
package com.wei.demo01.entity;import java.io.Serializable;public class UserBean implements Serializable {private Integer id;private String name;private String password;public Integer getId() {return id;}public void setId(Integer id) {this.id = id;}public String getName() {return name;}public void setName(String name) {this.name = name;}public String getPassword() {return password;}public void setPassword(String password) {this.password = password;}}
UserMapper接口文件：
注意：我在这里为偷懒，开始加入了@Mapper注解，目的就是为了不再写mapper映射文件（那个xml写的是真的是太慢了）
package com.wei.demo01.mapper;import com.wei.demo01.entity.UserBean;import org.apache.ibatis.annotations.Insert;import org.apache.ibatis.annotations.Mapper;import org.apache.ibatis.annotations.Param;import org.apache.ibatis.annotations.Select;import org.ponent;import org.springframework.stereotype.Repository;@Mapperpublic interface UserMapper {//查询，可以实现登录功能@Select("SELECT * FROM user WHERE name = #{name} AND password = #{password}")UserBean getInfo(@Param("name") String name, @Param("password") String password);//多个参数要加@Param修饰//增加，可以实现注册功能@Insert("insert into user(name,password)values(#{name},#{password})")void saveInfo(@Param("name") String name, @Param("password") String password);}
UserService.java文件
package com.wei.demo01.service;import com.wei.demo01.entity.UserBean;import com.wei.demo01.mapper.UserMapper;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.stereotype.Service;import javax.annotation.Resource;@Servicepublic class UserService {//将dao层属性注入service层@Resourceprivate UserMapper userMapper;public UserBean LoginIn(String name, String password) {return userMapper.getInfo(name,password);}public void Insert(String name,String password){userMapper.saveInfo(name, password);}}
下面都是一些静态html网页：
下面就把所有的代码按顺序依次放在一个框子里面;
<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>error</title></head><body><h1>登陆失败！</h1></body></html><!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>index</title></head><body><h1>你好啊</h1></body></html><!--登录页面--><!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>login</title></head><body><form role="form" action = "/loginIn" method="post">账号：<input type="text" id="name" name = "name"> <br>密码：<input type="password" id = "password" name = "password"> <br><input type="submit" id = "login" value = "login"><input type="button" id="register" value="注册"></form></body></html><!--注册页面--><!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>注册成功</title></head><body><form role="form" action="/register" method="post">请输入姓名:<input type="text" name="name" id="name"><br>请输入密码：<input type="password" name="password" id="password"><br><input type="submit" name="sign" value="提交"></form></body></html><!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>success</title></head><body><h1>欢迎，恭喜登陆成功/注册成功</h1></body></html>
最后登录效果展示：
注册效果展示：
注册成功！数据库更新成功！
有网友说我这个注册按钮打不开，跳转不到注册页面，那我在这里更新一下：
在登录页面中加入以下内容即可：
