Java拷贝文件

 import java.io.*; public class jCOPY {   public static void main(String args[]){     try {       jCOPY j = new jCOPY(); j.CopyFile(new File(args[0]),new File(args[1]));       }     catch (Exception e) {       e.printStackTrace();       }     }   public void CopyFile(File in, File out) throws Exception {     FileInputStream fis  = new FileInputStream(in);     FileOutputStream fos = new FileOutputStream(out);     byte[] buf = new byte[1024];     int i = 0;     while((i=fis.read(buf))!=-1) {       fos.write(buf, 0, i);       }     fis.close();     fos.close();     }   }