字节流和字节缓冲流的速度对比

import java.io.*;

/*
    1.基本字节流一次读写一个字节         //共耗时:756270 ms
    2。基本字节流一次读写一个字节数组      //共耗时:1071 ms
    3..字节缓冲流一次读写一个字节        // 共耗时:2732 ms
    4.字节缓冲流一次读写一个数组         // 共耗时:210 ms
 */
public class CopyAviDemo {
    public static void main(String[] args) throws IOException {
        long start = System.currentTimeMillis();

//        method1();
//        method2();
//        mathod3();
//        mathod4();

        long end = System.currentTimeMillis();
        System.out.println("共耗时:" + (end - start) + " ms");
    }

    private static void method1() throws IOException {
        FileInputStream fis = new FileInputStream("E:\\哔哩哔哩视频\\75918025\\1\\75918025_1_0.flv");
        FileOutputStream fos = new FileOutputStream("C:\\Users\\10270\\Desktop\\1.avi");
        int by;
        while ((by = fis.read()) != -1) {
            fos.write(by);
        }
        fis.close();
        fos.close();
    }

    private static void method2() throws IOException {
        FileInputStream fis = new FileInputStream("E:\\哔哩哔哩视频\\75918025\\1\\75918025_1_0.flv");
        FileOutputStream fos = new FileOutputStream("C:\\Users\\10270\\Desktop\\2.avi");
        int len;
        byte[] bys = new byte[1024];
        while ((len = fis.read(bys)) != -1) {
            fos.write(bys, 0, len);
        }
        fis.close();
        fos.close();
    }

    private static void mathod3() throws IOException {
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("E:\\哔哩哔哩视频\\75918025\\1\\75918025_1_0.flv"));
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("C:\\Users\\10270\\Desktop\\3.avi)"));

        int by;
        while ((by = bis.read()) != -1) {
            bos.write(by);
        }
        bis.close();
        bos.close();
    }

    private static void mathod4() throws IOException {
        BufferedInputStream bis = new BufferedInputStream(new FileInputStream("E:\\哔哩哔哩视频\\75918025\\1\\75918025_1_0.flv"));
        BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("C:\\Users\\10270\\Desktop\\4.avi"));

        int len;
        byte[] bys = new byte[1024];
        while ((len = bis.read(bys)) != -1) {
            bos.write(bys, 0, len);
        }
        bis.close();
        bos.close();
    }
}