SpringBoot+Mybatis实现登录注册的示例代码

学习SpringBoot+Mybatis实现的登录注册功能的Demo,实现这个Demo在网上也参考了资料和代码,本文是本人在实现Demo后的个人总结,以便理清思路。

1.环境

  • jdk8 : “1.8.0_281”
  • Maven: 3.6.3
  • Idea:2020.2
  • Mysql:5.6.40
  • Navicat:10.1.7

2.步骤

2.1 创建一个SpringBoot项目

选择依赖如下:

Web下的Spring Web。
Template Engines下的Thymeleaf。
SQL下的JDBC API、Spring Data JDBC、MySQL Driver。

项目的结构:

2.2 pom依赖配置

<?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>2.4.3</version>
  <relativePath/> <!-- lookup parent from repository -->
 </parent>
 <groupId>com.haungkd</groupId>
 <artifactId>weblogindemo</artifactId>
 <version>0.0.1-SNAPSHOT</version>
 <name>weblogindemo</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-jpa</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>
  
  <!-- mybatis-->
  <dependency>
   <groupId>org.mybatis.spring.boot</groupId>
   <artifactId>mybatis-spring-boot-starter</artifactId>
   <version>2.1.3</version>
  </dependency>

  <!--lombok-->
  <dependency>
   <groupId>org.projectlombok</groupId>
   <artifactId>lombok</artifactId>
   <version>1.18.12</version>
   <scope>provided</scope>
  </dependency>

  <!--druid连接池-->
  <dependency>
   <groupId>com.alibaba</groupId>
   <artifactId>druid</artifactId>
   <version>1.2.3</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 设置配置文件

yml文件配置:

其中url中的数据库记得对应,我的库为login

spring:
 datasource:
 driver-class-name: com.mysql.cj.jdbc.Driver
 url: jdbc:mysql://localhost:3306/login?serverTimezone=GMT%2B8&useSSL=true
 username: root #数据库
 password: 123456 #密码

properties文件配置:

#端口号
server.port=8088
#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包下创建实体类UserLogin

package com.huangkd.weblogindemo.pojo;

import javax.persistence.Table;

import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;

@Data // get/set 方法
@AllArgsConstructor//有参构造器
@NoArgsConstructor//无参构造器
@Table(name = "userlogin")
public class UserLogin {
 private String username;
 private String password;

 public String getUsername() {
  return username;
 }
}

2.5创建数据库和数据表

我创建login库,创建userlogin表,字段为username和password

2.6 连接数据库

在IDEA右边选择:

Database——> ——> Data Source——> Mysql

如果测试不通:出现如下:

是数据库时区问题

解决方法:

打开开最右侧 Advanced,找到 serverTimezone,在右侧value处填写 GMT,保存即可

2.7Mapper层(Dao):数据库持久层

在mapper包下建UserLoginMapper接口

package com.huangkd.weblogindemo.mapper;

import com.huangkd.weblogindemo.pojo.UserLogin;

import org.apache.ibatis.annotations.Mapper;
import org.springframework.stereotype.Repository;
import java.util.List;


@Mapper
@Repository
public interface UserLoginMapper {

 //定义增删改查方法

 //查询所有
 public List<UserLogin> queryAll();
 //添加数据

 public int add(UserLogin userLogin);

 //根据用户名查询

 public UserLogin queryByUsername(String username);
}

在resources下建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="com.huangkd.weblogindemo.mapper.UserLoginMapper">
 <select id="queryAll" resultType="com.huangkd.weblogindemo.pojo.UserLogin">
  select * from userlogin
 </select>
 <insert id="add" parameterType="com.huangkd.weblogindemo.pojo.UserLogin">
  insert into userlogin values (#{username},#{password})
 </insert>
 <select id="queryByUsername" resultType="com.huangkd.weblogindemo.pojo.UserLogin">
  select * from userlogin where username=#{username}
 </select>
</mapper>

2.8 Service层:业务逻辑层

在services下新建接口UserLoginServicesI和类UserLoginServicesImpl

UserLoginServicesI接口:

import com.huangkd.weblogindemo.pojo.UserLogin;

import java.util.List;

public interface UserLoginServicesl {
 //查询所有
 public List<UserLogin> queryAll();
 //添加数据
 public int add(UserLogin userLogin);
 //根据用户名查询
 public UserLogin queryByUsername(String username);
}

UserLoginServicesImpl类

package com.huangkd.weblogindemo.services;

import com.huangkd.weblogindemo.mapper.UserLoginMapper;
import com.huangkd.weblogindemo.pojo.UserLogin;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class UserLoginServicesImpl implements UserLoginServicesl {

 @Autowired
 //Service层调用dao层/mapper层 一般在service层中创建一个dao/mapper层对象
 //用对象调用对应的增删改查方法
 UserLoginMapper userLoginMapper;
 @Override
 public List<UserLogin> queryAll() {
  return userLoginMapper.queryAll();
 }

 @Override
 public int add(UserLogin userLogin) {
  return userLoginMapper.add(userLogin);
 }

 @Override
 public UserLogin queryByUsername(String username) {
  return userLoginMapper.queryByUsername(username);
 }
}

2.9 Controller层:控制层

在controller包下创建MyController类:

package com.huangkd.weblogindemo.controller;

import com.huangkd.weblogindemo.pojo.UserLogin;
import com.huangkd.weblogindemo.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 {
 //controller层调用service层
 //创建一个service层对象
 @Autowired
 UserLoginServicesImpl userLoginServices;

 //登录
 @RequestMapping("/toLogin")
 public String toLogin() {
  return "login";
 }

 @RequestMapping("/loginSuccess")
 public String loginSuccess(Model model, UserLogin userLogin) {
  //查询用户名是否存在
  UserLogin userLogin1 = userLoginServices.queryByUsername(userLogin.getUsername());
  if (userLogin1 != null) { //如果用户名存在
   if (userLogin1.getPassword().equals(userLogin.getPassword())) {
    System.out.println(userLogin1.toString());
    return "success";
   } else {
    model.addAttribute("data", "密码不正确");
    return "login";
   }

  } else { //用户名不存在,直接返回到登录页面
   model.addAttribute("data", "该用户不存在,请先注册");
   return "login";
  }
 }


 //注册
 @RequestMapping("/toRegister")
 public String toRegister() {
  return "register";
 }

 @RequestMapping("/toRegisterSuccess")
 public String toRegisterSuccess(Model model,UserLogin userLogin) {
  //添加一条记录到数据库中
  int add = userLoginServices.add(userLogin);
  System.out.println("插入数据成功");
  model.addAttribute("data","注册成功,请登录");
  return "login";

 }
}

2.10 前端页面

login.html:登录页面

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
 <meta charset="UTF-8">
 <title>login</title>
</head>
<body background="back.jpg">
<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>

regsister.html:注册页面

<!DOCTYPE html>
<html lang="en" xmlns:th="http://www.thymeleaf.org">
<head>
 <meta charset="UTF-8">
 <title>register</title>
</head>
<body background="back.jpg" >
<div align="center">
 <br><br><h1>注册界面</h1><br><br>
 <form method="get" action="/toRegisterSuccess">
  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:成功页面

成功页面我复制本人csdn首页源代码

3.测试

登录:

注册:

成功:

到此这篇关于SpringBoot+Mybatis实现登录注册的文章就介绍到这了,更多相关SpringBoot+Mybatis实现登录注册内容请搜索服务器之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持服务器之家!

原文链接:https://blog.csdn.net/hkdhkdhkd/article/details/114325941

本文链接:https://my.lmcjl.com/post/7405.html

展开阅读全文

4 评论

留下您的评论.