Home>

Here a text file is used as the data storage voting system.

1. vote.java:

package vote;
import java.io. *;
import java.util. *;
public class vote {
 public string filepath="";
 public int n;
 private file votefile;
 private bufferedreader fileread;
 private printwriter filewrite;
 public string systemmessage="";
 private string votestr []=new string [10];
 public int votenum []=new int [10];
 public void createfile () throws filenotfoundexception {
  votefile=new file (filepath);
  if (! votefile.exists ()) {
   filewrite=new printwriter (new fileoutputstream (filepath));
   for (int i=0;i<n;i ++)
    filewrite.println ("0");
   filewrite.close ();
  }
 }
 public void writefile () throws filenotfoundexception {
  filewrite=new printwriter (new fileoutputstream (filepath));
  for (int i=0;i<n;i ++) {
   filewrite.println (votenum [i]);
  }
  filewrite.close ();
 }
 public void readfile () throws filenotfoundexception {
  fileread=new bufferedreader (new filereader (filepath));
  for (int i=0;i<n;i ++) {
   try {
    votestr [i]=fileread.readline ();
   } catch (ioexception f) {
    votestr [i]="0";
   }
   votenum [i]=integer.parseint (votestr [i]);
  }
  try {
   fileread.close ();
  } catch (ioexception d) {
   systemmessage=d.tostring ();
  }
 }
}

2. vote.jsp:

<%@page contenttype="text/html;charset=gb2312"%>
<%@page import="java.util. *"%>
<%@page import="java.lang. *"%>
<%@page import="java.io. *"%>
<jsp:usebean scope="request" />
<%
string vote1=request.getparameter ("lang");
vote.n=4;
vote.filepath="vote.txt";
vote.createfile ();
vote.readfile ();
if (vote1.compareto ("0") == 0)
vote.votenum [0] ++;
if (vote1.compareto ("1") == 0)
vote.votenum [1] ++;
if (vote1.compareto ("2") == 0)
vote.votenum [2] ++;
if (vote1.compareto ("3") == 0)
vote.votenum [3] ++;
vote.writefile ();
%>
<script language="javascript">
 alert ("Thank you for your valuable vote");
 self.location="index.jsp";
</script>

3. see.jsp:

<%@page contenttype="text/html;charset=gb2312"%>
<%@page import="java.util. *"%>
<%@page import="java.lang. *"%>
<%@page import="java.io. *"%>
<jsp:usebean scope="request" />
<%
string vote1=request.getparameter ("lang");
vote.n=4;
vote.filepath="vote.txt";
vote.createfile ();
vote.readfile ();
int total=0;
float voteflo []=new float [5];
for (int i=0;i<4;i ++) total +=vote.votenum [i];
for (int i=0;i<4;i ++) voteflo [i]=150 * ((float) vote.votenum [i]/(float) total);
%>
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=gb2312">
<title>View survey</title>
<link href="t1.css" rel="stylesheet" type="text/css">
</head>
<body>
<table width="30%" border="0"&​​gt;
 <tr>
 <td colspan="2"><div align="center">Survey results</div></td>
 </tr>
 <tr>
 <td width="18%">jsp</td>
 <td width="82%"><img src="bar.gif" width =<%= voteflo [0]%>height=8><%= vote.votenum [0]%> ;</td>
 </tr>
 <tr>
 <td>asp</td>
 <td><img src="bar.gif" width =<%= voteflo [1]%>height=8><%= vote.votenum [1]%></td>
 </tr>
 <tr>
 <td>php</td>
 <td><img src="bar.gif" width =<%= voteflo [2]%>height=8><%= vote.votenum [2]%></td>
 </tr>
 <tr>
 <td>Other</td>
 <td><img src="bar.gif" width =<%= voteflo [3]%>height=8><%= vote.votenum [3]%></td>
 </tr>
 <tr>
 <td colspan="2"><div align="center"><a href="javascript:window.close ();">Close window</a></div><;/td>
 </tr>
</table>
</body>
</html>

Index.jsp:

<%@page contenttype="text/html;charset=gb2312"%>
<html>
<head>
<meta http-equiv="content-type" content="text/html;charset=gb2312">
<title>vote</title>
<link href="t1.css" rel="stylesheet" type="text/css">
</head>
<script language="javascript">
function cw ()
{
 window.open ("see.jsp", "mywindow",  "toolbar=no, left=150, top=200, width=270, height=350, menubar=no, systemmenu=no");
}
</script>
<body>
<table width="15%" height="250" align="left">
 <tr>
 <td><form name="form1" method="post" action="vote.jsp">
  <table width="100%" height="250" border="1" align="center" bordercolor="#9966cc">
   <tr>
   <td><div align="left">Your development language</div></td>
   </tr>
   <tr>
   <td><input type="radio" name="lang" value="0"&​​gt;
    jsp</td>
   </tr>
   <tr>
   <td><input type="radio" name="lang" value="1">
    asp</td>
   </tr>
   <tr>
   <td><input type="radio" name="lang" value="2">
    php</td>
   </tr>
   <tr>
   <td><input type="radio" name="lang" value="3">
    Others</td>
   </tr>
   <tr>
   <td><div align="center">
    <input name="vote" type="image" src="poll.gif" width="40" height="20" border="0"&​​gt;
      <a href="javascript:cw ()"><img src="see.gif" width="40" height="20" border="0"&​​gt;</a></div> ;</td>
   </tr>
  </table>
  </form></td>
 </tr>
</table>
</body>
</html>
jsp
  • Previous Reasons for automatic backslash before quotation marks after PHP form submission and three ways to close php magic quotes
  • Next jQuery + PHP star rating implementation method