Springboot登陆案例

程序员文章站 2022-04-10 16:30:45

1.通过 IDEA 的脚手架工具创建Spring Boot项目2.在数据库建立spring_login数据库，并新建user表，表结构如图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/1051447534.将自动生成的代码放到src/main/java下，如图：5.编辑pom.xml,在其中添加logging和druid依赖6...

1.通过 IDEA 的脚手架工具创建Spring Boot项目
Springboot登陆案例
2.在数据库建立spring_login数据库，并新建user表，表结构如图

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
4.将自动生成的代码放到src/main/java下，如图： Springboot登陆案例
5.编辑pom.xml,在其中添加logging和druid依赖

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>

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";
				}
 
			}	
	}

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;
	}
 
 
	
	
 
}

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>
	<!--先定义所有的appender(输出器) -->
	<appenders>
	    <!-- 输出到控制台 -->
	    <!--输出日志的格式，引用自定义模板 PATTERN -->
		<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

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
Springboot登陆案例
19.在浏览器输入localhost:8080/loginHtml

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