vote.java

来自「用于JSP1.0 开发的一个类似于动网的BBS论坛。 数据库是DB2＋JSP＋」· Java 代码 · 共 61 行

package chapter10;

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(!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();
                 }
                 }
}