java对字符串进行hmacsha256加密的方法

public static String HmacSHA256(String data, String key) throws Exception {
    Mac sha256_HMAC = Mac.getInstance("HmacSHA256");
    SecretKeySpec secret_key = new SecretKeySpec(key.getBytes(StandardCharsets.UTF_8), "HmacSHA256");
    sha256_HMAC.init(secret_key);
    byte[] array = sha256_HMAC.doFinal(data.getBytes(StandardCharsets.UTF_8));
    StringBuilder sb = new StringBuilder();
    for (byte item : array) {
        sb.append(Integer.toHexString((item & 0xFF) | 0x100).substring(1, 3));
    }

    return sb.toString().toUpperCase();
}