項目代碼已上傳至github，下載地址：https://github.com/snowlavenderlove/springbootLogin.git
1.通過springboot官網新建項目springbootLogin
2.點擊 generate the project
3.將壓縮包解壓並導入到eclipse中，Eclipse->file->import->maven->maven project->existing maven project,結構如圖
4.在數據庫建立spring_login數據庫，並新建user表，表結構如圖
5.通過generator-mybatis自動生成java代碼，generator-mybatis使用教程可見博文：https://blog.csdn.net/qq_37231511/article/details/90692784
6.將自動生成的代碼放到src/main/java下，如圖：
7.編輯pom.xml,在其中添加logging和druid依賴
8.編輯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
9.在src/main/resources/templates下創建登陸頁面和註冊頁面，分別爲loginHtml和registerHtml，代碼如下
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8"/>
<title>Insert title here</title>
</head>
<body>
<form action="/login" method="post">
用戶名：<input type="text" name="name"/>
密碼：<input type="password" name="password"/>
<input type="submit"/><a href="registerHtml" target="_blank">註冊</a>
</form>
</body>
</html>
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8"/>
<title>Insert title here</title>
</head>
<body>
<form action="/register" method="post">
用戶名：<input type="text" name="name"/>
密碼：<input type="password" name="password"/>
<input type="submit"/>
</form>
</body>
</html>
10. 在項目中新建controller包，創建LoginController類，編輯代碼
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;
// 登陸頁面
@RequestMapping("/loginHtml")
public String loginHtml(){
return "loginHtml";
}
// 註冊頁面
@RequestMapping("/registerHtml")
public String registerHtml(){
return "registerHtml";
}
// 登陸驗證
@RequestMapping("/login")
@ResponseBody //不返回頁面，返回json對象需加@ResponseBody
public String login(User user,HttpServletRequest request){
User result = null;
result = loginService.login(user);
if(null != result){
return "登陸成功 "+"name:"+user.getName()+" password:"+user.getPassword();
}else{
return "登陸失敗";
}
}
//註冊驗證
@RequestMapping("/register")
@ResponseBody //不返回頁面，返回json對象需加@ResponseBody
public String register(User user){
int result =0;
result = loginService.register(user);
if(0 != result){
return "註冊成功";
}else{
return "註冊失敗";
}
}
}
11. 在項目中創建service包，並在報下創建LoginService接口，同時創建子包Impl，在報下創建LoginServiceImpl實現LoginServcie接口，代碼分別爲
package com.xue.service;
import java.util.List;
import com.xue.entity.model.User;
public interface LoginService {
//註冊
public int register(User user);
//登陸
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;
}
}
12. 編寫UserMapper.java,在文件最後添加
User selectUser(User user);
int insertUser(User user);
13.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>
14.編輯SpringBootLoginApplication啓動類
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);
}
}
15.爲項目添加日誌配置，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>
16.將springboot默認日誌排除，將spring-boot-starter-web依賴修改爲
<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>
17.在src/main/resources中創建log4j2-spring.xml文件，並編輯
<?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>
<!--先定義所有的appender(輸出器) -->
<appenders>
<!-- 輸出到控制檯 -->
<!--輸出日誌的格式，引用自定義模板 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>
18.在application.properties中添加
#log4j2
logging.config=classpath:log4j2-spring.xml
19. 在相關代碼中添加，至此，項目代碼完成
private Logger logger = LoggerFactory.getLogger(this.getClass());
20.在瀏覽器輸入localhost:8080/registerHtml
21.輸入用戶名a密碼123456，點擊提交
22.在瀏覽器輸入localhost:8080/loginHtml
23.輸入登陸信息
