明日科技有限公司登录界面

login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%@ page import="javax.imageio.*"%>
<%@ page import="com.mingrisoft.*"%>

<!DOCTYPE html>
<html>
	<head lang="en">
		<meta charset="UTF-8">
		<title>明日科技有限公司</title>
		<meta http-equiv="X-UA-Compatible" content="IE=edge">
		<meta name="viewport"A
			content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no">
		<meta name="format-detection" content="telephone=no">
		<meta name="renderer" content="webkit">
		<meta http-equiv="Cache-Control" content="no-siteapp" />
		<link rel="stylesheet" href="css/amazeui.min.css" />
		<style>
		
.header {
	text-align: center;
}

.header h1 {
	font-size: 200%;
	color: #333;
	margin-top: 30px;
}

.header p {
	font-size: 14px;
}
</style>
	</head>
	<%
	response.setHeader("Pragma","No-cache");
	response.setHeader("Cache-Control","no-cache");
	response.setDateHeader("Expires", 0);
	request.setCharacterEncoding("utf-8");						     //设置编码方式为utf-8
	//处理表单，并进行异常处理，Action接收下面表单提交
	String Action = request.getParameter("Action");
	
	if(Action!=null && Action.equals("Login"))
	{
		String Page1  = (String)request.getHeader("Referer");		//得到页面地址来源
		String Page2  = request.getRequestURL().toString();			//得到当前页面地址
		
		String methon = request.getMethod();
		
		/*验证提交方式与访问页面来源与当前地址*/
		if (methon.equals("POST") && Page2.equals(Page1))
		{
			try{
				Function Fun = new Function();
				Login login = new Login();
				String IP = request.getRemoteAddr();						//得到客户端Ip地址
				String User = request.getParameter("User");     	        //得到登录用户名
				String Pwd = request.getParameter("Pwd");                   //得到登录密码
				
				
				if (login.LoginCheck(User,Pwd))
				{
					session.setAttribute("Login","Yes");
					session.setAttribute("AdminName",User);
					out.println("<SCRIPT LANGUAGE='JavaScript'>alert('登录成功！');location.href='news.jsp';</SCRIPT>");
					return;
				}
				else 
				{
					out.println("<SCRIPT LANGUAGE='JavaScript'>alert('用户名或密码不正确！');location.href='login.jsp';</SCRIPT>");
					
					return;
				}
			}catch(Exception e){
				out.println("<SCRIPT LANGUAGE='JavaScript'>alert('服务器异常！!');location.href='login.jsp';</SCRIPT>");
					return;
					}
		}
		else
		{
			response.sendError(403,"禁止访问");
			return;
		}
	}
%>

	<body>
		
		<div class="header">
			<div class="am-g">
				<h1>
					明日科技有限公司
				</h1>
			</div>
			<hr />
		</div>
		
		<div class="am-g">
			<div class="am-u-lg-6 am-u-md-8 am-u-sm-centered">
				<form action="login.jsp" method="post" class="am-form login-form" onSubmit="return LoginCheck()">
					<label for="User">
					<!-- 
					label标签和特定表单控件关联之后，如果用户在 label 元素内点击文本，就会触发关联的表单控件。
					就是说，当用户选择该label标签时，浏览器就会自动将焦点转到和label标签相关的表单控件上。
					<label> 标签的 for 属性应当与相关元素的 id 属性相同。
					 -->
						用户名:
					</label>
					<!-- 文本输入框  用于输入用户名 -->
					<input type="text" name="User" id="User"  value="">
					<br>
					<label for="Pwd">
						密码:
					</label>
					<!-- 文本输入框  用于输入用户密码-->
					<input type="password" name="Pwd"  id="Pwd"  value="">
					<br>

					<br />
					<div class="am-cf">
					<!-- 文本输入框  隐藏属性-->
					<input name="Action" type="hidden" value="Login">
					
					<!-- 用于登录提交按钮 -->
					<input type="submit" value="登 录" id="save"	class="am-btn am-btn-primary am-btn-sm am-fl">

					</div>
				</form>
				
			</div>
		</div>
		
	</body>

	<script src="js/jquery.min.js"></script>
	<script src="js/amazeui.min.js"></script>
<script>
/*
 *	验证提交用户名与密码是否为空
 */
function LoginCheck() 
{   

    var LoginCheck = false;
    if($("#User").val()==="" || $("#Pwd").val()===""){
		alert("用户名或密码不能为空!");
        return false;
	}
    
    return true;
}
</script>
	<!--<![endif]-->
</html>

Login.java

package com.mingrisoft;

import java.sql.Connection;
import java.sql.SQLException;

public class Login {

	DBConnection DBConn = new DBConnection();
	Function Fun = new Function();

	public boolean LoginCheck(String s1, String s2) {
		try {
			Connection Conn = DBConn.getConnection();
			boolean OK = true;
			OK = Fun.CheckLogin(Conn, s1, s2);
			return OK;

		} catch (SQLException e) {
			return false;
		}
	}
}

Function.java

package com.mingrisoft;

import java.sql.Connection;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class Function {
	DBConnection DBConn = new DBConnection();

	//数据库登录验证用户名与密码
	public boolean CheckLogin(Connection conn, String s1, String s2) throws SQLException {
		Statement stmt = conn.createStatement();
		ResultSet rs = null;
		boolean OK = true;
		String AdminPwd = "";
		String User = CheckReplace(s1);		//对登录提交的字符串进行非法字符的html转换
		String Pwd = CheckReplace(s2);		//对登录提交的字符串进行非法字符的html转换
		String Sql = "select * from Admin where AdminName='" + User + "'";
		rs = stmt.executeQuery(Sql);
		if (!rs.next()) {//假如数据库查无此数据，则rs为空
			OK = false;
		} else {
			AdminPwd = rs.getString("AdminPwd");
			if (Pwd.equals(AdminPwd)) {
				OK = true;
			} else {
				OK = false;
			}
		}
		return OK;
	}
}

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明日科技有限公司登录界面

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