📄 delete_do.jsp
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<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<%@ page import="java.sql.*"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'login_success.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<!--
<link rel="stylesheet" type="text/css" href="styles.css">
-->
</head>
<body>
<%
if(session.getAttribute("uname")!=null)
{
// 用户已登录
%>
<%!
String DBDRIVER = "net.sourceforge.jtds.jdbc.Driver" ;
String DBURL = "jdbc:jtds:sqlserver://127.0.0.1:1433/jspdemo" ;
String DBUSER = "sa" ;
String DBPASSWORD = "sa" ;
Connection conn = null ;
PreparedStatement pstmt = null ;
%>
<%
// 接收参数
int id = 0 ;
try
{
id = Integer.parseInt(request.getParameter("id")) ;
}
catch(Exception e)
{}
%>
<%
String sql = "DELETE FROM note WHERE id=?" ;
boolean flag = false ;
try
{
Class.forName(DBDRIVER) ;
conn = DriverManager.getConnection(DBURL,DBUSER,DBPASSWORD) ;
pstmt = conn.prepareStatement(sql) ;
// 设置删除条件
pstmt.setInt(1,id) ;
pstmt.executeUpdate() ;
pstmt.close() ;
conn.close() ;
flag = true ;
}
catch(Exception e)
{}
%>
<%
response.setHeader("refresh","2;URL=list_notes.jsp") ;
if(flag)
{
%>
留言删除成功，两秒后跳转到留言列表页！！！<br>
如果没有跳转，请按<a href="list_notes.jsp">这里</a>！！！
<%
}
else
{
%>
留言删除失败，两秒后跳转到留言列表页！！！<br>
如果没有跳转，请按<a href="list_notes.jsp">这里</a>！！！
<%
}
%>
<%
}
else
{
// 用户未登录，提示用户登录，并跳转
response.setHeader("refresh","2;URL=login.jsp") ;
%>
请您先登录！！！<br>
两秒后自动跳转到登录窗口！！！<br>
如果没有跳转，请按<a href="login.jsp">这里</a>！！！<br>
<%
}
%>
</body>
</html>
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