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标题: SpringBoot+mybatis+thymeleaf实现登录功能 [打印本页]

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作者: 专注的一批    时间: 2020-7-15 10:45
标题: SpringBoot+mybatis+thymeleaf实现登录功能
开始工作

先按照上图建立好相应的controller,mapper等文件。

接着进行一个配置

首先是application.properties

server.port=8080#启动端口

#加载Mybatis配置文件

mybatis.mapper-locations = classpath:mapper/*.xml

#数据源必填项

spring.datasource.driver-class-name= com.mysql.cj.jdbc.Driver

spring.datasource.url = jdbc:mysql://localhost:3306/studentmanage?useUnicode=true&characterEncoding=utf-8&serverTimezone=GMT

spring.datasource.username = root

spring.datasource.password = 123456

接着是spring启动主函数java文件

/*扫描mapper,防止找不到dao层文件，就写上*/

@MapperScan(basePackages = {"com.example.learn.Dao"})

@SpringBootApplication

public class LearnApplication {

public static void main(String[] args) {

SpringApplication.run(LearnApplication.class, args);

}

}

根据用户表，在entity建立实体类User.java,编译器都有相应的操作可以一键生成getter,setter,toString,只需定义好变量即可。
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public class User {

private String username;

private String password;

public String getUsername() {

return username;

}

public void setUsername(String username) {

this.username = username;

}

public String getPassword() {

return password;

}

public void setPassword(String password) {

this.password = password;

}

@Override

public String toString() {

return "User{" +

"username='" + username + '\'' +

", password='" + password + '\'' +

'}';

}

}

接着是Dao层

import com.example.learn.Entity.User;

import org.apache.ibatis.annotations.Mapper;

import org.apache.ibatis.annotations.Param;

import org.springframework.stereotype.Component;

@Mapper

@Component(value = "userDao")//这些都为配置注释

public interface UserDao {

//登录

public User login(@Param("username") String username,@Param("password") String password);

}

dao层写完，在写dao层配套的sql语句(mybatis功能)

mapper包里面建立.xml文件




select * from user_info where username=#{username} and password=#{password}


弄完这些接着到service层，包括impl接口实现

首先是service接口

import com.example.learn.Entity.User;

public interface UserService {

public User login(String username, String password);

}

接着是Impl下的实现类

import com.example.learn.Dao.UserDao;

import com.example.learn.Entity.User;

import com.example.learn.Service.UserService;

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

import org.springframework.stereotype.Service;

@Service("UserService")

public class UserServiceImpl implements UserService {

@Autowired

private UserDao userDao;

@Override

public User login(String username, String password) {

return userDao.login(username,password);

}

}

最后就是Controller

import com.example.learn.Entity.User;

import com.example.learn.Service.UserService;

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

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.PostMapping;

import javax.servlet.http.HttpServletRequest;

@Controller

public class UserController {

@Autowired

private UserService userService;

@PostMapping("/login")//可以换成@RequestMapping,action那里使用的命名

public String login(HttpServletRequest request, User u){

String username=request.getParameter("username");

String password=request.getParameter("password");

u=userService.login(username,password);

if(u!=null){

return "success";//到success的动态网页

}

return "redirect:/login.html";//这里是定向到login.html静态网页

}

}

测试工作

先在表中插入测试数据用户和密码

再建立两个html来测试功能

static/login.html


















templates/success








成功

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