Maven+SSM框架搭建测试（三）

刺骨的言语ヽ痛彻心扉 2022-05-29 12:10 218阅读 0赞

**主体**：本章主要是验证上一章配置的框架能否正常运行，下面写一个登陆的Demo作为验证。

**1.1** 在贴代码之前，首先创建一个简单的数据库用户表，并添加一条数据.

表结构

![70][]

表数据

![70 1][]

**2.1** 下面是代码部分,User实体类

package com.znkj.entity;
    
    import org.springframework.stereotype.Component;
    
    /**
     * 
     * @TODO 用户实体类，字段类型命名与数据库字段保持一致
     * @author hans
     * @date 2018年3月22日下午2:01:36
     *
     */
    @Component("user")
    public class User {
    	private int id;
    	private String account;
    	private String password;
    	public int getId() {
    		return id;
    	}
    	public void setId(int id) {
    		this.id = id;
    	}
    	public String getAccount() {
    		return account;
    	}
    	public void setAccount(String account) {
    		this.account = account;
    	}
    	public String getPassword() {
    		return password;
    	}
    	public void setPassword(String password) {
    		this.password = password;
    	}
    	public User(int id, String account, String password) {
    		super();
    		this.id = id;
    		this.account = account;
    		this.password = password;
    	}
    	public User() {
    		super();
    	}
    	@Override
    	public String toString() {
    		return "User [id=" + id + ", account=" + account + ", password=" + password + "]";
    	}
    	
    	
    	
    	
    	
    }

**2.2** UserDao接口：操作数据的接口

package com.znkj.dao;
    
    import com.znkj.entity.User;
    
    /**
     * 
     * @TODO 用户的dao接口
     * @author hans
     * @date 2018年3月22日下午2:07:10
     *
     */
    public interface UserDao {
    	//登录验证
    	public User login(User user);
    }

**2.3** com.znkj.mapper 包下的UserDaoMapper.xml ：sql操作数据

<?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.znkj.dao.UserDao">
    
    	
    	<select id="login" parameterType="com.znkj.entity.User" resultType="com.znkj.entity.User">
    		select id,account,password from user
    		where account=#{account} and password=#{password}
    	</select>
    </mapper>

**2.4** UserService接口：逻辑处理的接口

package com.znkj.service;
    
    import com.znkj.entity.User;
    
    /**
     * 
     * @TODO 有关用户的service接口
     * @author hans
     * @date 2018年3月22日下午2:05:17
     *
     */
    public interface UserService {
    	//登录验证
    	public User doLogin(User user);
    }

**2.5** UserServiceImpl实现类：逻辑处理

package com.znkj.service.impl;
    
    import org.springframework.beans.factory.annotation.Autowired;
    import org.springframework.stereotype.Service;
    
    import com.znkj.dao.UserDao;
    import com.znkj.entity.User;
    import com.znkj.service.UserService;
    /**
     * 
     * @TODO 有关用户的逻辑处理层
     * @author hans
     * @date 2018年3月22日下午2:09:13
     *
     */
    @Service("userService")
    public class UserServiceImpl implements UserService{
    	@Autowired
    	UserDao userDao;
    	@Autowired
    	User user;
    	
    	/**
    	 * @see 用户登录
    	 */
    	@Override
    	public User doLogin(User user) {
    		user=userDao.login(user);
    		return user==null?null:user;
    	}
    
    }

**2.6** UserController ：接收页面请求，分发请求

package com.znkj.controller;
    
    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.znkj.entity.User;
    import com.znkj.service.UserService;
    
    /**
     * 
     * @TODO 有关用户的controller
     * @author hans
     * @date 2018年3月22日下午2:00:24
     *
     */
    @Controller
    @RequestMapping("/user")
    public class UserController {
    	@Autowired
    	UserService userService;
    	
    	/**
    	 * 
    	 * @TODO
    	 * @author hans
    	 * @since http://localhost:8080/Try/user/login
    	 */
    	@ResponseBody
    	@RequestMapping("login")
    	public User login(User user){
    		System.out.println("请求登录的用户为:"+user.toString());
    		return userService.doLogin(user);
    	}
    	
    }

**2.7** 用户登录页面 webapp下创建login.jsp

<%@ page language="java" contentType="text/html; charset=utf-8"  
        pageEncoding="utf-8"%>  
    <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">  
    <html>  
    <head>  
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">  
    <title>用户登录页面</title>  
    </head>  
    <body>  
    <form action="/Template/user/login" method="post">  
        账户:<input name="account"><br>  
        密码:<input name="password"><br>  
        <input type="submit" value="登录"/>  
    </form>  
    </body>  
    </html>

打开 http://localhost:8080/Template/login.jsp 输入

![70 2][]

点击登录，页面弹出

![70 3][]

到此，整个项目就运行ok，可以用来写自己的功能模块了。

[70]: /images/20220529/7b62cc7595c24290bf63ee7c97879dd0.png
[70 1]: /images/20220529/4feaa93bd9384d40b798435db2512f55.png
[70 2]: /images/20220529/b23c7e92f99e45c395c96a99f6099202.png
[70 3]: /images/20220529/e13a2f398a83412bb76323edbf97c423.png