Springboot登陆案例

向右看齐 2022-12-24 04:54 120阅读 0赞

1.通过 IDEA 的脚手架工具创建Spring Boot项目  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JlaXhpc2h1bw_size_16_color_FFFFFF_t_70_pic_center]  
2.在数据库建立spring\_login数据库，并新建user表，表结构如图  
![在这里插入图片描述][20201126195755319.png_pic_center]

3.通过generator-mybatis自动生成java代码，generator-mybatis使用教程可见博文：  
[https://blog.csdn.net/beixishuo/article/details/105144753][https_blog.csdn.net_beixishuo_article_details_105144753]  
4.将自动生成的代码放到src/main/java下，如图：![在这里插入图片描述][20201126200019763.png_pic_center]  
5.编辑pom.xml,在其中添加logging和druid依赖  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JlaXhpc2h1bw_size_16_color_FFFFFF_t_70_pic_center 1]  
6.编辑application.propertis文件

#mysql
    spring.datasource.driver-class-name=com.mysql.jdbc.Driver
    spring.datasource.url=jdbc:mysql://127.0.0.1:3306/spring_login
    spring.datasource.username=root
    spring.datasource.password=123456
     
    #druid
    spring.datasource.type=com.alibaba.druid.pool.DruidDataSource
    #dao
    mybatis.type-aliases-package==com.xue.repository.dao
    mybatis.mapper-locations=classpath*:com/xue/repository/mapper/*.xml

7.在src/main/resources/templates下创建登陆页面和注册页面，分别为loginHtml和registerHtml，代码如下

<!DOCTYPE html>
    <html>
    <head>
    <meta charset="UTF-8"/>
    <title>Insert title here</title>
    </head>
    <body>
    <form action="/login" method="post">
    用户名：<input type="text" name="name"/>
    密码：<input type="password" name="password"/>
    <input type="submit"/><a href="registerHtml" target="_blank">注册</a>
    </form>
     
    </body>
    </html>

<!DOCTYPE html>
    <html>
    <head>
    <meta charset="UTF-8"/>
    <title>Insert title here</title>
    </head>
    <body>
    <form action="/register" method="post">
    用户名：<input type="text" name="name"/>
    密码：<input type="password" name="password"/>
    <input type="submit"/>
    </form>
    </body>
    </html>

1.  在项目中新建controller包，创建LoginController类，编辑代码

package com.xue.controller;
     
    import java.util.List;
     
    import javax.servlet.http.HttpServletRequest;
     
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.ResponseBody;
     
    import com.xue.entity.model.User;
    import com.xue.service.LoginService;
     
    @Controller
    public class LoginController {
        
    	
    	private Logger logger = LoggerFactory.getLogger(this.getClass());
    	
    	@Autowired
    	private LoginService loginService;
    	
    //	登陆页面
    	@RequestMapping("/loginHtml")
    	public String loginHtml(){
        
    		
    		return "loginHtml";
    		
    	}
    //	注册页面
    	@RequestMapping("/registerHtml")
    	public String registerHtml(){
        
     
    		return "registerHtml";
    	}
    	
    //	登陆验证
    	@RequestMapping("/login")
    	@ResponseBody //不返回页面，返回json对象需加@ResponseBody
    	public String login(User user,HttpServletRequest request){
        
    		
    		User result = null;
    		
    		result = loginService.login(user);
    		
    		if(null != result){
        
    			
    			return "登陆成功    "+"name:"+user.getName()+"   password:"+user.getPassword();
    		}else{
        
    			return "登陆失败";
    		}
     
    		}
    	//注册验证
    			@RequestMapping("/register")
    			@ResponseBody //不返回页面，返回json对象需加@ResponseBody
    			public String register(User user){
        
     
    				int result =0;
    				
    				
    				result = loginService.register(user);
    				
    				if(0 != result){
        
    					return "注册成功";
    				}else{
        
    					return "注册失败";
    				}
     
    			}	
    	}

1.  在项目中创建service包，并在报下创建LoginService接口，同时创建子包Impl，在报下创建LoginServiceImpl实现LoginServcie接口，代码分别为

package com.xue.service;
     
    import java.util.List;
     
    import com.xue.entity.model.User;
     
    public interface LoginService {
        
    	//注册
    	public int register(User user);
    	//登陆
    	public User login(User user);
     
     
    }

package com.xue.service.Impl;
     
    import java.util.List;
     
    import org.slf4j.Logger;
    import org.slf4j.LoggerFactory;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
     
    import com.xue.entity.model.User;
    import com.xue.repository.dao.UserMapper;
    import com.xue.service.LoginService;
    @Service
    public class LoginServiceImpl implements LoginService {
        
    	
    	
    	@Autowired
    	private UserMapper dao;
     
    	@Override
    	public int register(User user) {
        
    		// TODO Auto-generated method stub
    		System.out.println("Impl");
    		int result = 0;
    		System.out.println(user);
    		try {
        
    			result = dao.insertUser(user);
    		} catch (Exception e) {
        
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		return result;
    	}
     
    	@Override
    	public User login(User user) {
        
    		// TODO Auto-generated method stub
    		
    		
    		try {
        
    			user = dao.selectUser(user);
    		} catch (Exception e) {
        
    			// TODO Auto-generated catch block
    			e.printStackTrace();
    		}
    		return user;
    	}
     
     
    	
    	
     
    }

1.  编写UserMapper.java,在文件最后添加

User selectUser(User user);
        
        int insertUser(User user);

11.在UserMapper.xml中添加

<select id="selectUser" parameterType="com.xue.entity.model.User" resultMap="BaseResultMap">
          select name,password from user where name=#{
        name} and password=#{
        password}
      </select>
      
      <insert id="insertUser" parameterType="com.xue.entity.model.User">
          insert user(name,password) values(#{
        name},#{
        password})
      </insert>

12.编辑SpringBootLoginApplication启动类

package com.xue;
     
    import org.mybatis.spring.annotation.MapperScan;
    import org.springframework.boot.SpringApplication;
    import org.springframework.boot.autoconfigure.SpringBootApplication;
    import org.springframework.context.annotation.ComponentScan;
     
    @SpringBootApplication
    @MapperScan("com.xue.repository.dao")
    public class SpringbootLoginApplication {
        
     
    	public static void main(String[] args) {
        
    		SpringApplication.run(SpringbootLoginApplication.class, args);
    	}
     
    }

13.为项目添加日志配置，在pom.xml中添加

<dependency>
    		    <groupId>org.springframework.boot</groupId>
    		    <artifactId>spring-boot-starter-log4j2</artifactId>
    		    <version>1.5.2.RELEASE</version>
    		</dependency>

14.将springboot默认日志排除，将spring-boot-starter-web依赖修改为

<dependency>
    			<groupId>org.springframework.boot</groupId>
    			<artifactId>spring-boot-starter-web</artifactId>
    			<exclusions>
    				<exclusion>
    					<groupId>org.springframework.boot</groupId>
    					<artifactId>spring-boot-starter-logging</artifactId>
    				</exclusion>
    			</exclusions>
    		</dependency>

15.在src/main/resources中创建log4j2-spring.xml文件，并编辑

<?xml version="1.0" encoding="UTF-8"?>
    <configuration>
    	<properties>
    		<property name="PATTERN">%d{
        yyyy-MM-dd HH:mm:ss.SSS} |-%-5level	[%thread] %c [%L] -| %msg%n</property>
    	</properties>
    	
    	<appenders>
    	    
    	    
    		<Console
    			name="CONSOLE"
    			target="system_out">
    			<PatternLayout pattern="${PATTERN}" />
    		</Console>
    	</appenders>
     
    	<loggers>
    		<logger
    			name="com.xue"
    			level="debug" />
    		<root level="info">
    			<appenderref ref="CONSOLE" />
    		</root>
    	</loggers>
     
    </configuration>

16.在application.properties中添加

#log4j2
    logging.config=classpath:log4j2-spring.xml

1.  在相关代码中添加，至此，项目代码完成

private Logger logger = LoggerFactory.getLogger(this.getClass());

18.在浏览器输入localhost:8080/registerHtml  
![在这里插入图片描述][20201126200836773.png_pic_center]  
19.在浏览器输入localhost:8080/loginHtml  
![在这里插入图片描述][20201126200934594.png_pic_center]

如有文章对你有帮助，     “ 在看”和 转发是对我最大的支持！

![!\[在这里插入图片描述\](https://img-blog.csdnimg.cn/2020111620380146.png\#pic\_center][https_img-blog.csdnimg.cn_2020111620380146.png_pic_center]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JlaXhpc2h1bw_size_16_color_FFFFFF_t_70_pic_center]: /images/20221120/ce22b4831e6846dfacbc2b758811e76a.png
[20201126195755319.png_pic_center]: /images/20221120/278082bc43cb419290a6d1d20a160689.png
[https_blog.csdn.net_beixishuo_article_details_105144753]: https://blog.csdn.net/beixishuo/article/details/105144753
[20201126200019763.png_pic_center]: /images/20221120/9060d30270544c60a4fa095f75f91dec.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2JlaXhpc2h1bw_size_16_color_FFFFFF_t_70_pic_center 1]: /images/20221120/1fbfc2006a64497d869458db141b61f3.png
[20201126200836773.png_pic_center]: /images/20221120/47fe18ffb9234cdf98f47619ca41f59c.png
[20201126200934594.png_pic_center]: https://img-blog.csdnimg.cn/20201126200934594.png#pic_center
[https_img-blog.csdnimg.cn_2020111620380146.png_pic_center]: https://img-blog.csdnimg.cn/20201126201223835.png#pic_center