加密说明

    JSONObject param= new JSONObject();
   
    param.put("gryhmm",RSAClientUtil.encrypt("Zsjt999*"));

MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQC+vuYMGtTU+42wwbaFX+PkCuSeoREKe5V4EJMi553Gc03ficUdpLHIFdEjAMHAxepwm3RAGLwyxYFK/S93k8GYMuV35L2Nj/cVeHS8scsdqXzqLUKaI4wj438OI6HDh7rWsw1M5EgMsoZvQqja53+SgD3mgIy3XyILbmA5jUp2IwIDAQAB

public static String encrypt(String data) throws Exception {
	byte[] bytes = Base64.decode(publicKey);//publicKey 公钥
	X509EncodedKeySpec spec = new X509EncodedKeySpec(bytes);
	KeyFactory factory = KeyFactory.getInstance("RSA");
	PublicKey publicKey = factory.generatePublic(spec);
	Cipher cipher = Cipher.getInstance("RSA");
	cipher.init(Cipher.ENCRYPT_MODE, publicKey);
	int inputLen = data.getBytes().length;
	ByteArrayOutputStream out = new ByteArrayOutputStream();
	int offset = 0;
	byte[] cache;
	int i = 0;
	while (inputLen - offset > 0) {
	  if (inputLen - offset > 117) {
		  cache = cipher.doFinal(data.getBytes(), offset, 117);
	  } else {
		  cache = cipher.doFinal(data.getBytes(), offset, inputLen - offset);
	  }
	  out.write(cache, 0, cache.length);
	  i++;
	  offset = i * 117;
	}
	byte[] encryptedData = out.toByteArray();
	out.close();
	return Base64.encode(encryptedData);
}