IDEA下创建SpringBoot+MyBatis+MySql项目实现动态登录与注册功能
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一、搭建SpringBoot项目
Web下的Spring Web。
Template Engines下的Thymeleaf。
SQL下的JDBC API、Spring Data JDBC、MySQL Driver。
二、springboot整合mybatis.mysql
2.1、整体结构
2.2、设置所需要的依赖
<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>
2.3、设置application.yml文件与pplication.properties文件
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
#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
2.4、在pojo下的新建类UserLogin
package springbootweb04.demo.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
public class UserLogin {
private String username;
private String password;
public String getUsername() {
return username;
}
}
2.5、新建数据库,名为mybatis,创建用户表,名为userLogin,创建username、password字段
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
2.6、mapper层
package springbootweb04.demo.mapper;
import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
import springbootweb04.demo.pojo.UserLogin;
import java.util.List;
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);
}
2.7、resources目录下的mapper目录
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>
2.8、测试
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));
}
}
2.9、services层
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);
}
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、controller层
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;
public class MyController {
UserLoginServicesImpl userLoginServicesImpl;
public String toLogin(){
return "login";
}
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
public String toRegister(){
return "register";
}
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";
}
}
三、编写前端页面
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body style="background: aqua">
<div align="center">
<br><br><h2>登录界面</h2><br><br>
<span th:text="${data}" style="text-color:red;font-size: 10px"></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>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body style="background: aqua">
<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>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<body>
</body>
</html>
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