Map<String, Object> paramMap = new HashMap<>();
paramMap.put("mobile", mobile);
String s = JSON.toJSONString(paramMap);
String encrypt = AesEncryptUtil.encrypt(s, {secretKey});

public static String encrypt(String content, String encryptKey) {
    String key = encryptKey;
    if (encryptKey.length() > 64) {
        key = encryptKey.substring(0, DEFAULT_KEY_LEN);
    }
    try {
        Cipher cipher = Cipher.getInstance("AES");
        cipher.init(Cipher.ENCRYPT_MODE, new SecretKeySpec(key.getBytes("utf-8"), "AES"));
        byte[] b = cipher.doFinal(content.getBytes("utf-8"));
        return Base64.encodeBase64String(b);
    } catch (Exception e) {
        log.info("AesEncryptUtil encrypt catch e: {}", e);
        return null;
    }

}

#明文请求
{
     "parameters": {"name":"{姓名}","idNum":"{身份证号}","cardNo":"{银行卡号}","mobile":"{手机号}"}
}
#AES加密请求（就是将上述的就是将上述的{"name":"{姓名}","idNum":"{身份证号}","cardNo":"{银行卡号}","mobile":"{手机号}"}进行一次加密，并放入paramEncrypt属性中，详见上文 准备签名参数字符串paramEncrypt 章节）
{
 "paramEncrypt":"Ht8YMQtfxHplmfPn2BcXXZtE0lN2NGHKEgQrHO5W1/qREKpHOmj21N8uInLRDLeO",
 "reqEncryptType":1
}

{
   "code":"01",
   "data":{
               "id":"896487b984e14a9382b384a5d37f7fa5",
               "statusType":"业务成功"
          },
   "message":"验证成功，一致"
}

@Test
public void testTelecomApi() {
    String localUrl = "见已购列表";
    InvokeRequest invokeRequest = new InvokeRequest();
    // appKey
    Long timestamp = System.currentTimeMillis() / 1000;
    Map<String, Object> paramMap = new HashMap<>();

    String mobile = "手机号";
    String name = "姓名";
    String idNum = "身份证号";
    String cardNo = "银行卡号";
    paramMap.put("mobile", mobile);
    paramMap.put("name", name);
    paramMap.put("idNum", idNum);
    paramMap.put("cardNo", cardNo);

    String encrypt = AesEncryptUtil.encrypt(JSON.toJSONString(paramMap), "sk");
    invokeRequest.setParamEncrypt(encrypt);
    invokeRequest.setReqEncryptType(1);
    String secretKey = "sk";
    StringBuilder assemble = AssembleUtil.assembleParameters(new HashMap<>());
    if (StringUtils.isNotEmpty(invokeRequest.getParamEncrypt())) {
        assemble.append(invokeRequest.getParamEncrypt()).append("&");
    }
    assemble.append(timestamp).append("&").append(secretKey);
    System.out.println("assemble:" + assemble.toString());
    String signature = MD5Util.md5Encode(assemble.toString());
    String bodyJson = JSON.toJSONString(invokeRequest);
    List<Header> headers = new ArrayList<>();
    Header appKeyHeader = new BasicHeader("appkey", "ak");
    Header timeStampHeader = new BasicHeader("timestamp",
            String.valueOf(timestamp));
    Header msgEncryptionHeader = new BasicHeader("signature", signature);
    headers.add(appKeyHeader);
    headers.add(timeStampHeader);
    headers.add(msgEncryptionHeader);
    System.out.println(bodyJson);
    System.out.println(HttpsUtil.post(localUrl, headers.toArray(new Header[]{}), bodyJson,
            2000, 30000));
}

// assemble方法
public class AssembleUtil {
    public static <T> StringBuilder assembleParameters(Map<String, T> paramMap) {
        StringBuilder result = new StringBuilder();
        if (paramMap == null || paramMap.isEmpty()) {
            return result;
        }

        paramMap.entrySet().stream().sorted(Comparator.comparing(Map.Entry::getKey)).forEach(entry ->
                result.append(entry.getKey()).append("=").append(entry.getValue()).append("&"));
        return result;
    }
}

// md5方法
public static String md5Encode(String plainText) {
    byte[] secretBytes;
    try {
        secretBytes = MessageDigest.getInstance("md5").digest(plainText
                .getBytes());
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException("无此md5算法");
    }
    String md5code = (new BigInteger(1, secretBytes)).toString(16);
    return StringUtils.leftPad(md5code, 32, "0");
}