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();
}
}