java复制文件的简单方法

 

private void CopyFile(File originf,File clonef) throws IOException{
		 
		  int length=65535; //根据具体情况而定的文件长度
		  FileInputStream in=new FileInputStream(originf);
		  FileOutputStream out=new FileOutputStream(clonef);
		  byte[] buf=new byte[length];
		  while(true){
		   int num=in.read(buf);
		   if(ins==-1){
		    in.close();
		    out.flush();
		    out.close();
	 
		   }else
		    out.write(buffer,0,num);
		  }
	}