counter.java

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/*
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 * and open the template in the editor.
 */

package mypack;

import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;

/**
 *
 * @author Administrator
 */
public class Counter extends Object 
{
 private String currentRecord=null;
 private BufferedReader file;
 private String path;
 public Counter()
 {
 }
 public String ReadFile(String filePath)throws FileNotFoundException
 {
     path=filePath;
     file=new BufferedReader(new FileReader(path));
     String returnStr=null;
     try
     {
       currentRecord=file.readLine();
       
     }
     catch(IOException e)
     {
     System.out.println("读取数据错误");
     }
     if(currentRecord==null)
         returnStr="没有任何记录";
     else
     {
     returnStr=currentRecord;
     }
     return returnStr;
 }
 public void WriteFile(String filePath,String counter)throws FileNotFoundException
 {
  path=filePath;
  int Writestr=Integer.parseInt(counter)+1;
  try
  {
   PrintWriter pw=new PrintWriter(new FileOutputStream(filePath));
   pw.println(Writestr);
   pw.close();
  }
  catch(IOException e)
  {
   System.out.println("写入文件错误"+e.getMessage());
  }
  
  }
 
     
 
 
}