📄 user_delete_db.jsp
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<%@ page language="java" import="java.sql.*" pageEncoding="UTF-8"%>
<%
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 'user_delete_db.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>
<jsp:useBean id="test1" scope="application" class="test.Connect_db"/>
<body>
<%
Connection con=test1.getConnection();
int PageSize=10;
String sql1="delete from student where s_id=?";
String sql2="delete from teacher where t_id=?";
String sql3="delete from administrator where id=?";
String sql=null;
String checkbox_name[]={"1","2","3","4","5","6","7","8","9","10","11"};
String user_class=request.getParameter("user_class");
if(user_class.equals("student"))sql=sql1;
else if(user_class.equals("teacher"))sql=sql2;
else sql=sql3;
PreparedStatement ps=con.prepareStatement(sql);
for(int i=0;i<PageSize&&request.getParameter(checkbox_name[i])!=null;i++){
ps.setString(1,request.getParameter(checkbox_name[i]));
ps.executeUpdate();
}
%>
</body>
</html>
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