JSP实现投票系统源码由刀豆文库小编整理，希望给你工作、学习、生活带来方便，猜你可能喜欢“jsp实现投票系统”。
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 cla vote extends Object { public String filePath=“”;public int n;private File voteFile;private BufferedReader fileRead;private PrintWriter fileWrite;public String systemMeage=“”;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
fileWrite.close();
} } public void writeFile()
throws FileNotFoundException
{
fileWrite=new PrintWriter(new FileOutputStream(filePath));
for(int i=0;i
{
fileWrite.println(voteNum[i]);
}
fileWrite.close();
} public void readFile()
throws FileNotFoundException
{
fileRead=new BufferedReader(new FileReader(filePath));
for(int i=0;i
{
try
{voteStr[i]=fileRead.readLine();
}
catch(IOException f)
{
voteStr[i]=“0”;}
voteNum[i]=Integer.parseInt(voteStr[i]);
}
try
{
fileRead.close();
}
catch(IOException d)
{
systemMeage=d.toString();
}
} }
vote.jsp:
<%@ page contentType=“text/html;charset=gb2312” language=“java” errorPage=“” %> <%@ page import=“java.util.*”%> <%@ page import=“java.lang.*”%> <%@ page import=“java.io.*”%> <% 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();%>
see.jsp:
<%@ page contentType=“text/html;charset=gb2312” language=“java” errorPage=“” %> <%@ page import=“java.util.*”%> <%@ page import=“java.lang.*”%> <%@ page import=“java.io.*”%> <% 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 查看调查
调查结果
