Java 解析微信获取手机号信息

import javax.crypto.Cipher;  import javax.crypto.spec.IvParameterSpec;  import javax.crypto.spec.SecretKeySpec;  import java.nio.charset.StandardCharsets;  import java.util.Base64;    public class WeChatPhoneNumberDecrypter {        private static final String ALGORITHM = "AES/CBC/PKCS5Padding";        public static String decryptPhoneNumber(String encryptedData, String sessionKey, String iv) throws Exception {          // Base64 解码          byte[] encryptedDataBytes = Base64.getDecoder().decode(encryptedData);          byte[] sessionKeyBytes = Base64.getDecoder().decode(sessionKey);          byte[] ivBytes = Base64.getDecoder().decode(iv);            // 设置AES密钥和初始化向量          SecretKeySpec secretKeySpec = new SecretKeySpec(sessionKeyBytes, "AES");          IvParameterSpec ivParameterSpec = new IvParameterSpec(ivBytes);            // 创建Cipher实例并初始化          Cipher cipher = Cipher.getInstance(ALGORITHM);          cipher.init(Cipher.DECRYPT_MODE, secretKeySpec, ivParameterSpec);            // 解密          byte[] decryptedBytes = cipher.doFinal(encryptedDataBytes);            // 将解密后的字节转换为字符串          return new String(decryptedBytes, StandardCharsets.UTF_8);      }        public static void main(String[] args) {          try {              // 这些值通常从微信小程序前端获取，并通过网络请求发送到后端              String encryptedData = "..."; // 加密的手机号数据，从微信小程序获取              String sessionKey = "..."; // 会话密钥，从微信小程序获取              String iv = "..."; // 初始化向量，从微信小程序获取                // 解密手机号              String decryptedPhoneNumber = decryptPhoneNumber(encryptedData, sessionKey, iv);              System.out.println("解密后的手机号: " + decryptedPhoneNumber);          } catch (Exception e) {              e.printStackTrace();          }      }  }