Java获取图片的MD5

File file = new File(/usr/local/face.jpg);
try {
            FileInputStream fis = new FileInputStream(file);
            MessageDigest md = MessageDigest.getInstance(MD5);
            byte[] buffer = new byte[1024];
            int length = -1;
            while ((length = fis.read(buffer, 0, 1024)) != -1) {
                md.update(buffer, 0, length);
            }
            BigInteger bigInt = new BigInteger(1, md.digest());
            System.out.println(文件md5值： + bigInt.toString(16));
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (NoSuchAlgorithmException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }