FileInputStream fis=new FileInputStream("d:\\123.txt");
FileOutputStream fos=new FileOutputStream("e:\\00.txt");
byte b[] = new byte[1024*8];
int a;
while((a=fis.read())!=-1){
fos.write(b,0,a);
}

FileInputStream fis=new FileInputStream("d:\\123.txt");
FileOutputStream fos=new FileOutputStream("e:\\00.txt");
byte b[] = new byte[1024*8];
int a;
while((a=fis.read())!=-1){
fos.write(b,0,a);
}