解密步骤：一： aes工具包1.相关依赖<!--微信小程序进行解密加密的用户信息 --><dependency><groupId>org.bouncycastle</groupId><artifactId>bcprov-jdk16</artifactId><version>1.46</version></dependency>2.工具包
public static String decrypt(byte[] key, byte[] iv, byte[] encData) throws Exception {AlgorithmParameterSpec ivSpec = new IvParameterSpec(iv);Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");SecretKeySpec keySpec = new SecretKeySpec(key, "AES");cipher.init(Cipher.DECRYPT_MODE, keySpec, ivSpec);return new String(cipher.doFinal(encData),"UTF-8");}
二：实现类BASE64Decoder decoder = new BASE64Decoder();byte[] raw = decoder.decodeBuffer(iv);byte[] session_key = decoder.decodeBuffer(key);byte[] encryptedDataB = decoder.decodeBuffer(encryptedData);String decrypt = AESDUtils.decrypt(session_key, raw, encryptedDataB);
注： 返回信息如果不是正规json串，在做相应修改，我的是json串有个key和value之间用的‘；’，要做替换！！！！
