wjcaozuo.java

java对文件的各种操作,存储,读取,复制,删除等操作

/*
 *   
 *   文件操作处理
 *
 *    2007/08/22 
 *  
 */
package serial;
import java.io.*;
import javax.swing.*;

public class WJCaoZuo implements Runnable
{
   int ZiJie;                            //记录文件字节位数                         
   Thread athread;
   File file = null;
   byte buffer[]=new byte[1024];
   FileInputStream in = null;
   FileOutputStream out=null,out1=null;
   ProgressMonitor pMonitor = null;
   JEditorPane jtext = new JEditorPane();
   ProgressMonitorInputStream pmInputStream = null; 
   //文件复制函数
   public void copyFile(String src,String dest,String dest6)
   {  
      file = new File(dest); 
      if(!file.exists())
      {
         Copy(src,dest,dest6);            //调用复制函数
      }
      else
      {
      	 ZiJie = JOptionPane.showConfirmDialog(null,"       文件名已存在,是否覆盖?","系统提示",JOptionPane.YES_NO_OPTION);
         if(ZiJie==JOptionPane.YES_OPTION)
         {             
            Copy(src,dest,dest6);    
         }  
      }
   }
   //文件写入
   public void ReadFile(String src1,String dest1)
   {
   	  file = new File(dest1);
   	  if(file!=null)
      {
      	 try
         {
            out1 = new FileOutputStream(file);
         }
         catch(FileNotFoundException fe){} 
         try
         {
            out1.write(src1.getBytes());
         }
         catch(IOException ioe){} 
         finally
         {
            try
            {
               if(out1 != null)
                 out1.close();
            } catch(IOException ioe2){}
         } 
      }
   }
   //文件读出
   public String WriteFile(String dest2)
   {
   	  file = new File(dest2);
   	  if(file.isFile())
      {
      	 try
         {                      
            jtext.setPage("file:"+dest2);
         }
         catch(IOException ioe)
         {
           ioe.printStackTrace(System.err);           
         } 
	  }
	  return jtext.getText();   
   }
   //删除文件
   public void DeleteFile(String dest3)
   {
   	  file = new File(dest3);
   	  if(file.isFile())
      {
      	 file.delete();
      }
   }
   //复制函数
   public void Copy(String src2,String dest4,String dest5)
   {
   	  file = new File(dest4);
   	  try
      {
         file.createNewFile();
         in = new FileInputStream(src2);
         out = new FileOutputStream(file);  
         pmInputStream = new ProgressMonitorInputStream(null,dest5,in);    
         pMonitor = pmInputStream.getProgressMonitor();
         pMonitor.setMillisToDecideToPopup(10);
         pMonitor.setMillisToPopup(0);
         athread = new Thread(this);
         athread.start(); 
      }
      catch(IOException e){} 
   }
   //读取文件线程
   public void run()
   {
   	  try
      {
         while((ZiJie=pmInputStream.read(buffer))!=-1)
         {
            for(int i=0;i<ZiJie;i++)
            {
               out.write(buffer[i]); 
            }
            if(pMonitor.isCanceled()) 
            {
               pmInputStream.close();
               in.close();
               out.close();
               athread.stop();
            } 
         }
         JOptionPane.showMessageDialog(null,"         数据处理完成!","系统提示",JOptionPane.INFORMATION_MESSAGE);     
         pmInputStream.close();
         in.close();
         out.close();
         out = null;
         athread.stop();
      }
      catch(IOException e){} 
   }
   public void renameFile(String path,String oldname,String newname)
   {
        if(!oldname.equals(newname))
        {//新的文件名和以前文件名不同时,才有必要进行重命名 
           File oldfile=new File(path+"/"+oldname);
           File newfile=new File(path+"/"+newname);
           if(newfile.exists())
           {//若在该目录下已经有一个文件和新文件名相同，则不允许重命名
              newfile=new File(path+"/@"+newname);
           } 
           else
           {
              oldfile.renameTo(newfile);
           } 
        }         
    }
}