private String encrypt(String encodeString) {
		//空字符串不加密
		if (StringUtil.isEmpty(encodeString)) {
			return "";
		}
		try {
			byte[] modulusBytes = new BASE64Decoder().decodeBuffer(PropertiesHelp.getProperty(
				configPath, "encrypt.modulus"));
			byte[] exponentBytes = new BASE64Decoder().decodeBuffer(PropertiesHelp.getProperty(
				configPath, "encrypt.exponent"));
			BigInteger modulus = new BigInteger(1, modulusBytes);
			BigInteger exponent = new BigInteger(1, exponentBytes);

			RSAPublicKeySpec rsaPubKey = new RSAPublicKeySpec(modulus, exponent);
			KeyFactory fact = KeyFactory.getInstance("RSA");
			PublicKey pubKey = fact.generatePublic(rsaPubKey);

			Cipher cipher = Cipher.getInstance("RSA");
			cipher.init(Cipher.ENCRYPT_MODE, pubKey);

			byte[] bytes = encodeString.getBytes();
			byte[] encodedByteArray = new byte[] {};
			for (int i = 0; i < bytes.length; i += 102) {
				byte[] subarray = ArrayUtils.subarray(bytes, i, i + 102);
				byte[] doFinal = cipher.doFinal(subarray);
				encodedByteArray = ArrayUtils.addAll(encodedByteArray, doFinal);
			}

			return new BASE64Encoder().encode(encodedByteArray);
		} catch (Exception e) {
			logger.error(e.getMessage());
		}
		return null;
	}