JSP實(shí)現(xiàn)投票系統(tǒng)源碼.doc

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1、這是用文本文件作為存儲(chǔ)載體的投票系統(tǒng)：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("感謝你投了寶貴的一票");?self.location="index.jsp";?????see.jsp:<%@pagecontentType="text/html;ch