java file copy test

public static void copyTest() throws Exception {

    FileInputStream fis = new FileInputStream("aa.zip");

    FileOutputStream fos = new FileOutputStream("bb.zip");

    

    int bytesRead;

    byte[] buffer = new byte[1024 * 2];

    

    while ((bytesRead = fis.read(buffer, 0, buffer.length)) > -1) {

        fos.write(buffer, 0, bytesRead);

    }

    

    fis.close();

    fos.close();

}