package Demo4;import java.io.*;public class CopyMp4Demo {public static void main(String[] args) throws IOException {
//        记录开始时间long startTime = System.currentTimeMillis();//复制视频
//        method1();
//        共耗时:57486毫秒
//        method2();
//        共耗时:98毫秒
//        method3();
//        共耗时:286毫秒method4();
//        共耗时:28毫秒
//        记录结束时间long endTime = System.currentTimeMillis();System.out.println("共耗时:" + (endTime - startTime) + "毫秒");}//    方法1：基本字节流一次读写一个字节private static void method1() throws IOException {FileInputStream fis = new FileInputStream("C:\\Users\\muzih\\Desktop\\VID.mp4");FileOutputStream fos = new FileOutputStream("D:\\MyProject\\Java\\LearnJava1\\src\\Demo4\\mymp4.mp4");int by;while ((by = fis.read()) != -1) {fos.write(by);}fos.close();fis.close();}//方法2：基本字节流一次读写一个字节数组private static void method2() throws IOException {FileInputStream fis = new FileInputStream("C:\\Users\\muzih\\Desktop\\VID.mp4");FileOutputStream fos = new FileOutputStream("D:\\MyProject\\Java\\LearnJava1\\src\\Demo4\\mymp4.mp4");byte[] bys = new byte[1024];int len;while ((len = fis.read(bys)) != -1) {fos.write(bys, 0, len);}fos.close();fis.close();}// 方法3   字节缓冲流一次读写一个字节private static void method3() throws IOException {BufferedInputStream bis = new BufferedInputStream(new FileInputStream("C:\\Users\\muzih\\Desktop\\VID.mp4"));BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("D:\\MyProject\\Java\\LearnJava1\\src\\Demo4\\mymp4.mp4"));int by;while ((by = bis.read()) != -1) {bos.write(by);}bos.close();bis.close();}// 方法4   字节缓冲流一次读写一个字节数组private static void method4() throws IOException {BufferedInputStream bis = new BufferedInputStream(new FileInputStream("C:\\Users\\muzih\\Desktop\\VID.mp4"));BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream("D:\\MyProject\\Java\\LearnJava1\\src\\Demo4\\mymp4.mp4"));byte []bys=new byte[1024];int len;while ((len = bis.read(bys)) != -1) {bos.write(bys,0,len);}bos.close();bis.close();}
}