这篇文章将为大家详细讲解有关怎么在IDEA中使用SpringBoot+MyBatis+MySql实现一个动态登录与注册功能，文章内容质量较高，因此小编分享给大家做个参考，希望大家阅读完这篇文章后对相关知识有一定的了解。
1.1、file ——> new ——> project——> Spring Initializr——> next——> next——> next——> finish
注意选择包依赖关系
即pom.xml文件
<?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>2.4.2</version> <relativePath/> <!-- lookup parent from repository --> </parent> <groupId>springboot-web04</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <name>demo</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-data-jdbc</artifactId> </dependency> <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>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <scope>runtime</scope> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!--下面的都是我加的--> <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>2.1.3</version> </dependency> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> </dependency> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.18.12</version> <scope>provided</scope> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>druid</artifactId> <version>1.2.1</version> </dependency> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> <exclusions> <exclusion> <groupId>org.junit.vintage</groupId> <artifactId>junit-vintage-engine</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.xmlunit</groupId> <artifactId>xmlunit-core</artifactId> </dependency> <dependency> <groupId>org.mybatis</groupId> <artifactId>mybatis</artifactId> <version>3.4.6</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-maven-plugin</artifactId> </plugin> </plugins> </build> </project>
在resources目录下新建yml文件，用于存放数据库连接需要的一些数据
spring: datasource: driver-class-name: com.mysql.cj.jdbc.Driver url: jdbc:mysql://localhost:3306/mybatis?serverTimezone=GMT%2B8&useSSL=true username: root //数据库 password: sm1208 //密码
在application.properties文件中加入
#端口号 server.port=8080 #druid数据库连接池 type=com.alibaba.druid.pool.DruidDataSource #清除缓存 spring.thymeleaf.cache=false #配置mapper mybatis.mapper-locations=classpath:mapper/*.xml
package springbootweb04.demo.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
@Data
@AllArgsConstructor
@NoArgsConstructor
public class UserLogin {
private String username;
private String password;
public String getUsername() {
return username;
}
}2.5.1、数据库名可以随意，不过要与application.yml文件中的一致
2.5.2、IDEA中连接数据库
Database——> +——> Data Source——> Mysql
新建UserLoginMapper接口
package springbootweb04.demo.mapper;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
import springbootweb04.demo.pojo.UserLogin;
import java.util.List;
@Mapper
@Repository
public interface UserLoginMapper {
//查询
public List<UserLogin> queryAll();
//添加数据
public int add(UserLogin userLogin);
//根据用户名查询数据
public UserLogin queryByName(String username);
}在resources目录下新建mapper目录，并在这个目录下新建UserLoginMapper.xml文件
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapper
PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
"http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="springbootweb04.demo.mapper.UserLoginMapper">
<select id="queryAll" resultType="springbootweb04.demo.pojo.UserLogin">
select * from userLogin
</select>
<insert id="add" parameterType="springbootweb04.demo.pojo.UserLogin">
insert into userLogin values (#{username},#{password})
</insert>
<select id="queryByName" resultType="springbootweb04.demo.pojo.UserLogin">
select * from userLogin where username = #{username}
</select>
</mapper>在test.Java.springbootweb04.demo类中，测试是否能联通数据库，没有报错说明成功。
package springbootweb04.demo;
import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import springbootweb04.demo.mapper.UserLoginMapper;
import springbootweb04.demo.pojo.UserLogin;
import org.springframework.beans.factory.annotation.Autowired;
import javax.sql.DataSource;
import java.sql.Connection;
import java.sql.SQLException;
import java.util.List;
@SpringBootTest
class DemoApplicationTests {
@Autowired
DataSource dataSource;
@Test
void contextLoads() throws SQLException {
System.out.println(dataSource.getClass());
Connection connection = dataSource.getConnection();
System.out.println(connection);
//template模板，拿来即用
connection.close();
}
@Autowired
UserLoginMapper userLoginMapper;
@Test
public void toTest(){
List<UserLogin> userLogins = userLoginMapper.queryAll();
userLogins.forEach(e-> System.out.println(e));
}
}在services下新建接口UserLoginServicesI和类UserLoginServicesImpl
UserLoginServicesI接口：
package springbootweb04.demo.services;
import springbootweb04.demo.pojo.UserLogin;
import java.util.List;
public interface UserLoginServicesI {
//查询
public List<UserLogin> queryAll();
//添加数据
public int add(UserLogin userLogin);
//根据用户名查询数据
public UserLogin queryByName(String username);
}UserLoginServicesImpl类
package springbootweb04.demo.services;
import springbootweb04.demo.mapper.UserLoginMapper;
import springbootweb04.demo.pojo.UserLogin;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import java.util.List;
@Service
public class UserLoginServicesImpl implements UserLoginServicesI {
@Autowired
UserLoginMapper userLoginMapper;
@Override
public List<UserLogin> queryAll() {
return userLoginMapper.queryAll();
}
@Override
public int add(UserLogin userLogin) {
return userLoginMapper.add(userLogin);
}
@Override
public UserLogin queryByName(String username) {
return userLoginMapper.queryByName(username);
}
}2.A、conteoller层
编写MyController类
package springbootweb04.demo.controller;
import springbootweb04.demo.pojo.UserLogin;
import springbootweb04.demo.services.UserLoginServicesImpl;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class MyController {
@Autowired
UserLoginServicesImpl userLoginServicesImpl;
@RequestMapping("/toLogin")
public String toLogin(){
return "login";
}
@RequestMapping("/LoginSuccess")
public String LoginSuccess(Model model, UserLogin userLogin){
//先查询看该用户名是否存在
UserLogin userLogin1 = userLoginServicesImpl.queryByName(userLogin.getUsername());
if(userLogin1 != null){ // 如果查询的用户不为空
System.out.println(userLogin1.toString());
return "success";
}
else{
//返回到登录页面
model.addAttribute("data","该用户不存在，请先注册");
return "login";
}
}
//登录界面
@RequestMapping("/toRegister")
public String toRegister(){
return "register";
}
@RequestMapping("/RegisterSuccess")
public String toRegisterSuccess(Model model,UserLogin userLogin){
//将账号密码加入到数据库中
int add = userLoginServicesImpl.add(userLogin);
System.out.println("数据插入成功！");
model.addAttribute("data","注册成功，请登录！");
return "login";
}
}将以下三个页面放在templates下面
login.html：登录页面
<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body >
<div align="center">
<br><br><h3>登录界面</h3><br><br>
<span th:text="${data}" ></span>
<form method="get" action="/LoginSuccess">
用户名:<input type="text" name="username" placeholder="请输入用户名" required/><br><br>
密码：<input type="text" name="password" placeholder="请输入密码" required/><br><br>
<input type="submit" value="登录">
</form>
<br>
<form method="get" action="/toRegister">
<input type="submit" value="注册">
</form>
</div>
</body>
</html>register.html:注册页面
<!DOCTYPE html> <html lang="en" xmlns:th="http://www.thymeleaf.org"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body > <div align="center"> <br><br>注册界面<br><br> <form method="get" action="/RegisterSuccess"> 用户名:<input type="text" name="username" placeholder="请输入用户名" required/><br><br> 密码：<input type="text" name="password" placeholder="请输入密码" required/><br><br> 确认密码：<input type="text" name="password2" placeholder="请输入密码" required/><br><br> <input type="submit" value="注册"> </form> </div> </body> </html>
success.html：成功界面
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> </head> <body> </body> </html>
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