JSP实现的简单Web投票程序代码
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2022-05-03 16:24:55
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:
pack...
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>
希望本文所述对大家的jsp程序设计有所帮助。
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