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拷贝文件的Java源代码


  //-----------Class CopyFile Begin---------
  //Class CopyFile
  //CopyRight:Writed By Yun-Fengsheng
  //Last modify time:2001-11-16
  //Method: public boolean copy(String from_filename,String to_filename)
  class CopyFile
  {
   public boolean copy(String file1,String file2)
   {
   try //must try and catch,otherwide will compile error
     {
   //instance the File as file_in and file_out
   java.io.File file_in=new java.io.File(file1);
   java.io.File file_out=new java.io.File(file2);
   FileInputStream in1=new FileInputStream(file_in);
      FileOutputStream out1=new FileOutputStream(file_out);
   byte[] bytes=new byte[1024];
   int c;
   while((c=in1.read(bytes))!=-1)
    out1.write(bytes,0,c);
   in1.close();
   out1.close();
   return(true); //if success then return true
      }
  
    catch(Exception e)
      { 
    System.out.println("Error!");
    return(false); //if fail then return false
      }
   }
  }
  
  //Class CopyFile Example
  /*
  CopyFile copy1=new CopyFile();
  boolean copy_ok=copy1.copy("c:/hello.jsp","c:/hello_backup.jsp");
  if(copy_ok)
  {
   out.println("拷贝成功!");
  }
  else
  {
   out.println("拷贝失败!");
  }
  */
  //-----------Class CopyFile End-----------
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