IO流10 --- 缓冲流(字节型)实现非文本文件的复制 --- 技术搬运工（尚硅谷）

• 字节型缓冲流,BufferedOutputStream默认缓冲区大小 8192字节byte，满了自动flush()

@Test
public void test6(){
    File srcFile = new File("FLAMING MOUNTAIN.JPG");
    File destFile = new File("FLAMING MOUNTAIN2.JPG");
    FileInputStream fis = null;
    FileOutputStream fos = null;

    try {
        //节点流
        fis = new FileInputStream(srcFile);
        fos = new FileOutputStream(destFile);
        //缓冲流
        BufferedInputStream bis = new BufferedInputStream(fis);
        BufferedOutputStream bos = new BufferedOutputStream(fos);

        //复制文件
        byte[] buffer = new byte[10];
        int len;
        while ((len = bis.read(buffer)) != -1){
            bos.write(buffer, 0, len);
        }
    } catch (IOException e) {
        e.printStackTrace();
    }finally {
        //关闭外层流，内层自动关闭
        if (bos != null){
            try {
                bos.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if (bis != null){
            try {
                bis.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}