用ssm框架做一个简单的登录(基于ssm框架搭建完成)

男娘i 2021-11-27 04:04 351阅读 0赞

搭建ssm的请看这：

[https://blog.csdn.net/h\_j\_c\_123/article/details/96999464][https_blog.csdn.net_h_j_c_123_article_details_96999464]

代码如下：

controller代码：

package com.vrv.controller;
    
    import com.vrv.model.User;
    import com.vrv.service.LoginService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    @Controller
    @RequestMapping(value = "user")
    public class LoginController {
       @Autowired
       LoginService loginService;
    
       @RequestMapping(value = "login")
       public String login() {
          System.out.println("进来了");
          User user = new User();
          user.setStu_num("1606390234");
          user.setStu_pwd("123456");
          try {
             int count = loginService.login(user);
             if (count >= 1) {
                System.out.println("登录成功");
             }
          } catch (Exception e) {
             e.printStackTrace();
          }
          return "user/login";
       }
    }

服务层代码：

package com.vrv.service;
    
    import com.vrv.model.User;
    
    public interface LoginService {
       public  int login(User user) throws  Exception;
    }

实现层代码：

package com.vrv.impi;
    
    import com.vrv.dao.UserDao;
    import com.vrv.model.User;
    import com.vrv.service.LoginService;
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    @Service
    public class LoginImpi implements LoginService {
       @Autowired
       UserDao userDao;
       @Override
       public int login(User user) throws Exception {
          int count = userDao.loginDao(user);
          return count;
       }
    }

dao层代码：

package com.vrv.dao;
    
    import com.vrv.model.User;
    import org.apache.ibatis.annotations.Param;
    
    public interface UserDao {
       int loginDao(@Param("user")User user) throws  Exception;
    }

model层的javaBean:

package com.vrv.model;
    
    public class User {
       private int id;
       private String stu_name;
       private String stu_num;
       private String stu_pwd;
       private String login_type;
    
       public int getId() {
          return id;
       }
    
       public void setId(int id) {
          this.id = id;
       }
    
       public String getStu_name() {
          return stu_name;
       }
    
       public void setStu_name(String stu_name) {
          this.stu_name = stu_name;
       }
    
       public String getStu_num() {
          return stu_num;
       }
    
       public void setStu_num(String stu_num) {
          this.stu_num = stu_num;
       }
    
       public String getStu_pwd() {
          return stu_pwd;
       }
    
       public void setStu_pwd(String stu_pwd) {
          this.stu_pwd = stu_pwd;
       }
    
       public String getLogin_type() {
          return login_type;
       }
    
       public void setLogin_type(String login_type) {
          this.login_type = login_type;
       }
    
       public User(int id, String stu_name, String stu_num, String stu_pwd, String login_type) {
          this.id = id;
          this.stu_name = stu_name;
          this.stu_num = stu_num;
          this.stu_pwd = stu_pwd;
          this.login_type = login_type;
       }
    
       @Override
       public String toString() {
          return "User{" +
                "id=" + id +
                ", stu_name='" + stu_name + '\'' +
                ", stu_num='" + stu_num + '\'' +
                ", stu_pwd='" + stu_pwd + '\'' +
                ", login_type='" + login_type + '\'' +
                '}';
       }
    
       public User() {
       }
    }

mapper映射文件：

<?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.vrv.dao.UserDao">
        <select id="loginDao" resultType="int">
            select count(*) from t_login WHERE  stu_num = #{user.stu_num} and stu_pwd = #{user.stu_pwd}
        </select>
    </mapper>

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![20201214163531501.jpg][]

[https_blog.csdn.net_h_j_c_123_article_details_96999464]: https://blog.csdn.net/h_j_c_123/article/details/96999464
[20201214163531501.jpg]: /images/20211126/56f776732fe64f55aa7e8dc1b35b0a0a.png