JSP实现投票系统源码.doc

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1、这是用文本文件作为存储载体的投票系统：vote.java:packagevote;importjava.io.*;importjava.util.*;publicclassvoteextendsObject{ publicStringfilePath=""; publicintn; privateFilevoteFile; privateBufferedReaderfileRead; privatePrintWriterfileWrite; publicStringsystemMessage=""; privateString

2、voteStr[]=newString[10]; publicintvoteNum[]=newint[10]; publicvoidcreateFile()     throwsFileNotFoundException{     voteFile=newFile(filePath);      if(!voteFile.exists())      {       fileWrite=newPrintWriter(newFileOutputStream(filePath));       for(inti=0;i

3、)fileWrite.println("0");       fileWrite.close();       }}publicvoidwriteFile()    throwsFileNotFoundException    {    fileWrite=newPrintWriter(newFileOutputStream(filePath));    for(inti=0;i

4、);      }publicvoidreadFile()       throwsFileNotFoundException         {         fileRead=newBufferedReader(newFileReader(filePath));         for(inti=0;i

5、      {         voteStr[i]="0";}         voteNum[i]=Integer.parseInt(voteStr[i]);         }         try         {            fileRead.close();         }         catch(IOExceptiond)         {         systemMessage=d.toString();         }         }}                   

6、      vote.jsp:<%@pagecontentType="text/html;charset=gb2312"language="java"errorPage=""%><%@pageimport="java.util.*"%><%@pageimport="java.lang.*"%><%@pageimport="java.io.*"%><%Stringvote1=request.getParameter("l

7、ang");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.writeFi

8、le();%> alert("感谢你投了宝贵的一票"); self.location="index.jsp";     see.jsp:<%@pagecontentType="text/html;ch