HashUtils.java 文件源码

public static String calcSHA(File file) throws Exception {
    MessageDigest sha1 = MessageDigest.getInstance("SHA-512");
    InputStream input = new FileInputStream(file);
    try {
        byte[] buffer = new byte[8192];
        int len = input.read(buffer);
        while (len != -1) {
            sha1.update(buffer, 0, len);
            len = input.read(buffer);
        }
        input.close();
        return new HexBinaryAdapter().marshal(sha1.digest());
    } catch (Exception ex) {
        return "";
    }
}