<span style="font-size:18px;">登錄頁面</span><span style="font-size:18px;"></span><pre name="code" class="java"><%@page contentType="text/html" pageEncoding="GBK"%>
<html>
<head><title>河南</title></head>
<body>
<center>
<h1>登陸操作</h1>
<hr>
<form action="login_check.jsp" method="post">
<table border="1">
<tr>
<td colspan="2">
用戶登陸
</td>
</tr>
<tr>
<td>登陸ＩＤ：</td>
<td><input type="text" name="id"></td>
</tr>
<tr>
<td>登陸密碼：</td>
<td><input type="password" name="password"></td>
</tr>
<tr>
<td colspan="2">
<input type="submit" value="登陸">
<input type="reset" value="重置">
</td>
</tr>
</table>
</form>
</center>
</body>
</html>檢查頁面
<span style="font-size:18px;"></span><pre name="code" class="java"><%@page contentType="text/html" pageEncoding="GBK"%>
<%@ page import="java.sql.*"%>
<html>
<head><title>河南</title></head>
<body>
<center>
<h1>登陸操作</h1>
<hr>
<%! // 定義若干個數據庫的連接常量
public static final String DBDRIVER = "org.gjt.mm.mysql.Driver" ;
public static final String DBURL = "jdbc:mysql://localhost:3306/mldn" ;
public static final String DBUSER = "root" ;
public static final String DBPASS = "admin" ;
%>
<%
Connection conn = null ; // 數據庫連接
PreparedStatement pstmt = null ; // 數據庫預處理操作
ResultSet rs = null ; // 查詢要處理結果集
boolean flag = false ; // 保存標記
String name = null ; // 保存真實姓名
%>
<%
try{
%>
<%
Class.forName(DBDRIVER) ;
conn = DriverManager.getConnection(DBURL,DBUSER,DBPASS) ;
String sql = "SELECT name FROM user WHERE userid=? AND password=?" ;
pstmt = conn.prepareStatement(sql) ;
pstmt.setString(1,request.getParameter("id")) ;
pstmt.setString(2,request.getParameter("password")) ;
rs = pstmt.executeQuery() ; // 查詢
if(rs.next()){ // 如果有數據，則可以執行
flag = true ; // 表示登陸成功
name = rs.getString(1) ;
}
%>
<%
}catch(Exception e) {
e.printStackTrace() ;
}
finally{
try{
rs.close() ;
pstmt.close() ;
conn.close() ;
} catch(Exception e){}
}
%>
<%
if(flag){ // 登陸成功
%>
<jsp:forward page="login_success.jsp">
<jsp:param name="uname" value="<%=name%>"/>
</jsp:forward>
<%
} else { // 登陸失敗
%>
<jsp:forward page="login_failure.jsp"/>
<%
}
%>
</center>
</body>
</html><span style="font-size:18px;"></span><pre name="code" class="java"><%@page contentType="text/html" pageEncoding="GBK"%>
<html>
<head><title>河南</title></head>
<body>
<center>
<h1>登錄操作</h1>
<h2>登錄成功</h2>
<h2>歡迎<font color="red"><%=request.getParameter("uname")%></font>光臨</h2>
</center>
</body>
</html><span style="font-size:18px;">頁面截圖</span><span style="font-size:18px;"><img src="https://img-blog.csdn.net/20150601110647945?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvc3dhbnpodQ==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" /><img src="https://img-blog.csdn.net/20150601110531761?watermark/2/text/aHR0cDovL2Jsb2cuY3Nkbi5uZXQvc3dhbnpodQ==/font/5a6L5L2T/fontsize/400/fill/I0JBQkFCMA==/dissolve/70/gravity/Center" alt="" />
</span>
