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();
}
}