实现一个用户登录模块_import com.itheima.core.service.userservice;-优快云博客

该博客介绍了Java Web项目的实现步骤，包括创建持久化类User.java，实现DAO层的UserDao.java和UserDao.xml，实现Service层的UserService.java和UserServiceImpl.java，实现Controller层的UserController.java，以及实现页面功能的index.jsp和login.jsp。

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1、创建持久化类

User.java

package com.itheima.core.po;

import java.io.Serializable;

public class User implements Serializable{
	private static final long serialVersionUID = 1L;
	private Integer user_id;
	private String user_code;
	private String user_name;
	private String user_password;
	private String user_state;
	public Integer getUser_id() {
		return user_id;
	}
	public void setUser_id(Integer user_id) {
		this.user_id = user_id;
	}
	public String getUser_code() {
		return user_code;
	}
	public void setUser_code(String user_code) {
		this.user_code = user_code;
	}
	public String getUser_name() {
		return user_name;
	}
	public void setUser_name(String user_name) {
		this.user_name = user_name;
	}
	public String getUser_password() {
		return user_password;
	}
	public void setUser_password(String user_password) {
		this.user_password = user_password;
	}
	public String getUser_state() {
		return user_state;
	}
	public void setUser_state(String user_state) {
		this.user_state = user_state;
	}

	
	
}

2、实现DAO

UserDao.java

package com.itheima.core.dao;

import org.apache.ibatis.annotations.Param;

import com.itheima.core.po.User;

public interface UserDao {
	public User findUser(@Param("usercode") String usercode,
						 @Param("password") String password);
}

UserDao.xml

<?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.itheima.core.dao.UserDao">
	<!-- 查询用户 -->
	<select id="findUser" parameterType="String" resultType="user">
		select * from sys_user 
		where user_code=#{usercode}
		and user_password=#{password}
		and user_state='1'		
	</select>
</mapper>

3、实现Service

UserService.java

package com.itheima.core.service;

import com.itheima.core.po.User;

public interface UserService {
	public User findUser(String usercode,String password);
}

UserServiceImpl.java

package com.itheima.core.service.impl;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import com.itheima.core.dao.UserDao;
import com.itheima.core.po.User;
import com.itheima.core.service.UserService;

@Service("userService")
@Transactional
public class UserServiceImpl implements UserService{
	@Autowired
	private UserDao userDao;
	@Override
	public User findUser(String usercode,String password) {
		User user=this.userDao.findUser(usercode,password);
		return user;
	}
}

4、实现Controller

UserController.java

package com.itheima.core.web.controller;

import javax.servlet.http.HttpSession;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.itheima.core.po.User;
import com.itheima.core.service.UserService;

@Controller
public class UserController {
	@Autowired
	private UserService userService;
	/**
	 * 用户登录
	 */
	@RequestMapping(value="/login.action",method=RequestMethod.POST)
	public String login(String usercode,String password,Model model,HttpSession session) {
		User user = userService.findUser(usercode, password);
		if(user!=null) {
			//将用户对象添加到Session
			session.setAttribute("USER_SESSION",user);
			return "customer";
		}
		model.addAttribute("msg","账号或密码错误，请重新输入");
		return "login";
	}
	
}

5、实现页面功能

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
<!-- 转发到登录页面 -->
<jsp:forward page="/WEB-INF/jsp/login.jsp"/>

<%@ page language="java" contentType="text/html; charset=UTF-8"
	pageEncoding="UTF-8"%>
<!DOCTYPE HTML>
<html>
<head>
<title>登录页面</title>
<meta http-equiv=Content-Type content="text/html; charset=utf-8">
<link href="${pageContext.request.contextPath}/css/style.css"
	   type=text/css rel=stylesheet>
<link href="${pageContext.request.contextPath}/css/boot-crm.css"
	   type=text/css rel=stylesheet>
<script src=
       "${pageContext.request.contextPath}/js/jquery-1.11.3.min.js">
</script>
<meta content="MSHTML 6.00.2600.0" name=GENERATOR>
<script>
// 判断是登录账号和密码是否为空
function check(){
    var usercode = $("#usercode").val();
    var password = $("#password").val();
    if(usercode=="" || password==""){
    	$("#message").text("账号或密码不能为空！");
        return false;
    }  
    return true;
}
</script>
</head>
<body leftMargin=0 topMargin=0 marginwidth="0" marginheight="0"
	background="${pageContext.request.contextPath}/images/rightbg.jpg">
<div ALIGN="center">
<table border="0" width="1140px" cellspacing="0" cellpadding="0" id="table1">
	<tr>
		<td height="93"></td>
		<td></td>
	</tr>
	<tr>
   <td background="${pageContext.request.contextPath}/images/rights.jpg"
		width="740" height="412">
   </td>
   <td class="login_msg" width="400" align="center">
	 <!-- margin:0px auto; 控制当前标签居中 -->
	 <fieldset style="width: auto; margin: 0px auto;">
		  <legend>
		     <font style="font-size:15px" face="宋体">
		          欢迎使用BOOT客户管理系统
		     </font>
		  </legend> 
		<font color="red">
			 <%-- 提示信息--%>
			 <span id="message">${msg}</span>
		</font>
		<%-- 提交后的位置：/WEB-INF/jsp/customer.jsp--%>
		<form action="${pageContext.request.contextPath }/login.action" 
			                       method="post" onsubmit="return check()">
                      &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;<br /><br />
          账&nbsp;号：<input id="usercode" type="text" name="usercode" />
          <br /><br />
          密&nbsp;码：<input id="password" type="password" name="password" />
          <br /><br />
          &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;
          <center><input type="submit" value="登录" /></center>
		 </form>
	 </fieldset>
	</td>
	</tr>
</table>
</div>
</body>
</html>