📄 delete.jsp
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<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%>
<%@ page import="java.sql.*" %>
<%
request.setCharacterEncoding("gbk");
int id=Integer.parseInt(request.getParameter("id"));
%>
<%Class.forName("com.mysql.jdbc.Driver");
String url="jdbc:mysql://localhost/bbs?useUnicode=true&characterEncoding=gbk";
Connection conn=DriverManager.getConnection(url,"root","12345");
conn.setAutoCommit(false);
Statement stmt1=conn.createStatement();
ResultSet rs1=stmt1.executeQuery("select * from article where id="+id);
if(rs1.next())
{
session.setAttribute("pid",new Integer(rs1.getInt("pid")));
}
PreparedStatement pstmt=conn.prepareStatement("delete from article where id=?");
Statement stmt=conn.createStatement();
pstmt.setInt(1,id);
pstmt.executeUpdate();
ResultSet rs=stmt.executeQuery("select * from article where pid="+id);
if(! rs.next())
{
out.println(session.getAttribute("pid"));
stmt.executeUpdate("update article set isleaf=0 where id="+session.getAttribute("pid"));
}
rs1.close();
stmt1.close();
conn.commit();
conn.setAutoCommit(true);
session.removeAttribute("pid");
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'delete.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>
This is my JSP page. <br>
</body>
</html>
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