JSP实现的简单Web投票程序代码

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();
  }
 }
}

%@ page contentType="text/html; charset=gb2312" %>
%@ page import="java.util.*"%>
%@ page import="java.lang.*"%>
%@ page import="java.io.*"%>
jsp:useBean id="vote" scope="request" class="vote.vote"/>
%
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("感谢你投了宝贵的一票");
 self.location="index.jsp";
/script>

%@ page contentType="text/html; charset=gb2312" %>
%@ page import="java.util.*"%>
%@ page import="java.lang.*"%>
%@ page import="java.io.*"%>
jsp:useBean id="vote" scope="request" class="vote.vote"/>
%
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;i4;i++) total+=vote.voteNum[i];
for(int i=0;i4;i++) voteFlo[i]=150*((float)vote.voteNum[i]/(float)total);
%>
html>
head>
meta http-equiv="Content-Type" content="text/html; charset=gb2312">
title>查看调查/title>
link href="t1.css" rel="stylesheet" type="text/css">
/head>
body>
table width="30%" border="0" class="t1">
 tr> 
 td colspan="2">div align="center">调查结果/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>其他/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();">关闭窗口/a>/div>/td>
 /tr>
/table>
/body>
/html>

%@ page contentType="text/html; charset=gb2312" %>
html>
head>
meta http-equiv="Content-Type" content="text/html; charset=gb2312">
title>投票/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" class="t1">
   tr>
   td>div align="left">你所使用的开发语言/div>/td>
   /tr>
   tr>
   td>input type="radio" name="lang" value="0">
    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">
    其他 /td>
   /tr>
   tr>
   td>div align="center">
    input name="vote" type="image" src="poll.gif" width="40" height="20" border="0">
      a href="javascript:cw()">img src="see.gif" width="40" height="20" border="0">/a>/div>/td>
   /tr>
  /table>
  /form>/td>
 /tr>
/table>
/body>
/html>