JSP实现的简单Web投票程序代码

2024-09-05 00:22:18

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这篇文章主要介绍了JSP实现的简单Web投票程序代码,较为详细的分析了JSP实现投票功能的具体步骤与相关技巧,具有一定参考借鉴价值,需要的朋友可以参考下

本文实例讲述了JSP实现的简单Web投票程序。分享给大家供大家参考。具体如下：

这里使用文本文件作为数据存储的投票系统。

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 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>

3. see.jsp：

<%@ 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;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>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>

4. index.jsp：

<%@ 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>