• 字节流读写非文本文件（图片、视频等）

@Test
public void test5(){
    File srcFile = new File("FLAMING MOUNTAIN.JPG");
    File destFile = new File("FLAMING MOUNTAIN1.JPG");
    FileInputStream fis = null;
    FileOutputStream fos = null;
    
    try {
        //字节输入输出流
        fis = new FileInputStream(srcFile);
        fos = new FileOutputStream(destFile);

        //复制
        byte[] buffer = new byte[5];
        int len;
        while ((len = fis.read(buffer)) != -1){
            fos.write(buffer, 0, len);
        }
    } catch (IOException e) {
        e.printStackTrace();
    } finally {
        if (fos != null){
            try {
                fos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (fis != null){
            try {
                fis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}