这是用文本文件作为存储载体的投票系统：
vote.java:
package vote;
import java.io.*;
import java.util.*;
public class vote extends Object
{
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(!ists())
{
fileWrite=new PrintWriter(new FileOutputStream(filePath));
for(int i=0;i<n;i++) fileWrite.println("0");
fileWrite.clo();
}
快乐英文怎么写}
public void writeFile()
throws FileNotFoundException
成功案例分析 {
fileWrite=new PrintWriter(new FileOutputStream(filePath));
for(int i=0;i<n;i++)
{
fileWrite.println(voteNum[i]);
}
fileWrite.clo();
}
public void readFile()
throws FileNotFoundException
{
fileRead=new BufferedReader(new FileReader(filePath));
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for(int i=0;i<n;i++)
{
try
{voteStr[i]=adLine();
}
catch(IOException f)
{
voteStr[i]="0";}
voteNum[i]=Integer.parInt(voteStr[i]);
}
try
{
fileRead.clo();
}
catch(IOException d)
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{
String();
}
}
}
vote.jsp:
<%@ page contentType="text/html; chart=gb2312" language="java" errorPage="" %>
<%@ page import="java.util.*"%>
<%@ page import="java.lang.*"%>
holy night<%@ page import="java.io.*"%>
<jsp:uBean id="vote" scope="request" class="vote.vote"/>
<%
String Parameter("lang");
vote.n=4;
vote.filePath="";
ateFile();
adFile();
pareTo("0")==0)
vote.voteNum[0]++;
pareTo("1")==0)
vote.voteNum[1]++;
pareTo("2")==0)
vote.voteNum[2]++;
pareTo("3")==0)
vote.voteNum[3]++;
vote.writeFile();
%>
<script language="javascript">
alert("感谢你投了宝贵的一票");
lf.location="index.jsp";
</script>
e.jsp:
<%@ page contentType="text/html; chart=gb2312" language="java" errorPage="" %>
<%@ page import="java.util.*"%>
<%@ page import="java.lang.*"%>
<%@ page import="java.io.*"%>
<jsp:uBean id="vote" scope="request" class="vote.vote"/>
<%
String Parameter("lang");
vote.n=4;
vote.filePath="";
ateFile();
adFile();
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>
jo
<meta http-equiv="Content-Type" content="text/html; chart=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i know him so well</td>
<td><img src="bar.gif" width=<%=voteFlo[3]%> height=8> <%=vote.voteNum[3]%></td>
</tr>
<tr>
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<td colspan="2"><div align="center"><a href="javascript:window.clo();">关闭窗口</a></div></td>
</tr>
</table>
</body>
</html>
index.jsp:
<%@ page contentType="text/html; chart=gb2312" language="java" import="java.sql.*" errorPage="" %>
<html>
<head>
赛巴巴<meta http-equiv="Content-Type" content="text/html; chart=gb2312">
<title>投票</title>
<link href="t1.css" rel="stylesheet" type="text/css">
</head>
<script language="javascript">
绘画培训班function cw()
{window.open("e.jsp","mywindow","toolbar=no,left=150,top=200,width=270,height=350,menubar=no,systemMenu=no");
}
</script>
