📄 tp.jsp
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<%@ page language="java" contentType="text/html; charset=gb2312" import="javasql.*"%>
<jsp:useBean id="db" class="yhgl.connectDB" />
<html>
<head>
<title>网上投票</title>
</head>
<body>
<%
String topic_id = request.getParameter("topicid");
String topic = request.getParameter("topic");
String id = request.getParameter("xuanze");
String sql = "update WSTP_XUANZE set CHOICE_NUM = CHOICE_NUM + 1 where TOPIC_ID = "+topic_id+" and ID = "+id;
ResultSet rs = null;
try
{
db.executeUpdate(sql);
%>
<script language="javascript">
alert("投票成功！");
</script>
<%
sql = "select * from WSTP_XUANZE where TOPIC_ID="+topic_id;
rs = db.executeQuery(sql);
if(rs.next())
{
%>
<table>
<tr>
<td colspan="3"><%=topic%></td>
</tr>
<tr>
<td width="20%">选择1</td>
<td width="40%"><%=rs.getString("CHOICE")%></td>
<td width="40%"><%=rs.getInt("CHOICE_NUM")%>人投票</td>
</tr>
<%
int i=2;
while(rs.next())
{
%>
<tr>
<td width="20%">选择<%=i++%></td>
<td width="40%"><%=rs.getString("CHOICE")%></td>
<td width="40%"><%=rs.getInt("CHOICE_NUM")%>人投票</td>
</tr>
<%
}
%>
<tr>
<td colspan="3" align="center"><a href="index.jsp">返回</a></td>
</tr>
</table>
<%
}
else
{
session.setAttribute("error","3");
response.sendRedirect("error.jsp");
}
}
catch(Exception e)
{
e.printStackTrace();
session.setAttribute("error","2");
response.sendRedirect("error.jsp");
}
finally
{
try
{
db.closeDB();
rs.close();
}
catch(Exception ee)
{
ee.printStackTrace();
session.setAttribute("error","2");
response.sendRedirect("error.jsp");
}
}
%>
</body>
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