java实现视频文件的复制（四种方法）

java实现视频文件的复制（四种方法）

public class file_01 {
    public static void main(String[] args) throws IOException {
        long start = System.currentTimeMillis();
        System.out.println(start);
        way1();
        /*
        way2();
        way3();
        way4();
        */
        long end = System.currentTimeMillis();
        System.out.println(end);
        System.out.println("共耗时：" + (end - start) + "毫秒");

    }

    public static void way1() throws IOException {
        FileInputStream fis = new FileInputStream("c:\\file\\copy.mp4");
        FileOutputStream fos = new FileOutputStream("C:\\file\\javaSE\\copy.mp4");
        int by;
        while ((by = fis.read()) != -1) {
            fos.write(by);
        }
        fos.close();
        fis.close();
    }

    public static void way2() throws IOException {
        FileInputStream fis = new FileInputStream("c:\\file\\copy.mp4");
        FileOutputStream fos = new FileOutputStream("C:\\file\\javaSE2\\copy.mp4");
        byte[] by = new byte[1024];
        int len;
        while ((len = fis.read(by)) != -1) {
            fos.write(by, 0, len);
        }
        fos.close();
        fis.close();

    }

    public static void way3() throws IOException {
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("c:\\file\\copy.mp4"));
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("C:\\file\\javaSE3\\copy.mp4"));
        int by;
        while ((by = bis.read()) != -1) {
            bos.write(by);
        }
        bos.close();
        bis.close();
    }

    public static void way4() throws IOException {
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("c:\\file\\copy.mp4"));
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("C:\\file\\javaSE4\\copy.mp4"));
        byte[] by = new byte[1024];
        int len;
        while ((len = bis.read(by)) != -1) {
            bos.write(by, 0, len);
        }
        bos.close();
        bis.close();

    }
}