📄 cchaninfo.jsp
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<%@ page contentType="text/html; charset=gb2312" language="java" import="java.sql.*" errorPage="" %>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>课程信息管理</title>
<style type="text/css">
<!--
body,td,th {
font-size: 12px;
}
body {
background-image: url(image/bg_002.gif);
}
-->
</style></head>
<body>
<%
String loginNum=(String)session.getAttribute("lnum");
String name=(String)session.getAttribute("name");
session.setAttribute("lnum",loginNum);
session.setAttribute("name",name);
if(loginNum.equals("3"))
{
Connection conn=null;
Statement stmt=null;
String coId=(String)session.getAttribute("coId");
String sId=(String)session.getAttribute("sId");
String cnId=(String)request.getParameter("cId");
ResultSet rs = null;
try
{
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
conn=DriverManager.getConnection("jdbc:odbc:xk","sa","");
stmt=conn.createStatement();
String sql1="select * from course where coId='"+cnId+"'";
System.out.println(sql1);
rs=stmt.executeQuery(sql1);
int cNumAll=0;
int cNum=0;
int num=0;
while(rs.next())
{
cNumAll=rs.getInt("cNumAll");
cNum=rs.getInt("cNum");
num=cNumAll-cNum;
}
stmt.close();
System.out.println(num);
if(num>0){
String sql="update choosecourse set coId='"+cnId+"'where sId='"+sId+"'";
System.out.println(sql);
stmt=conn.createStatement();
stmt.executeUpdate(sql);
stmt.close();
String sql3="update course set cNum=cNum-1 where coId='"+coId+"'";
System.out.println(sql3);
stmt=conn.createStatement();
stmt.executeUpdate(sql3);
stmt.close();
String sq2="update course set cNum=cNum+1 where coId='"+cnId+"'";
System.out.println(sq2);
stmt=conn.createStatement();
stmt.executeUpdate(sq2);
stmt.close();
response.sendRedirect("ccManage.jsp");
}else{
out.println("该选题已达到最大人数！");
}
}
catch(Exception e){out.println("输入有误");out.print("<a href=ccManage.jsp>课题选择信息管理页面</a>");
}
}
else
{out.println("请先登陆.....");
out.print("<a href=../index.jsp>登陆页面</a>");
}
%>
</body>
</html>
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