public String getPublicKey() {
    String publickey = null;
    try {
      Map<String, Object> keyMap = RSAUtils.genKeyPair();
      publickey = RSAUtils.getPublicKey(keyMap);
      String privateKey = RSAUtils.getPrivateKey(keyMap);
      System.out.println("init userStatusCache - private key:" + privateKey);
      userStatusCache.setPrivateKey(privateKey);
    } catch (Exception e) {
      e.printStackTrace();
    }

    return publickey;
  }