String appid = "wx4f4bc4dec97d474b";
String sessionKey = "tiihtNczf5v6AKRyjwEUhQ==";
String encryptedData =
"CiyLU1Aw2KjvrjMdj8YKliAjtP4gsMZM"+
"QmRzooG2xrDcvSnxIMXFufNstNGTyaGS"+
"9uT5geRa0W4oTOb1WT7fJlAC+oNPdbB+"+
"3hVbJSRgv+4lGOETKUQz6OYStslQ142d"+
"NCuabNPGBzlooOmB231qMM85d2/fV6Ch"+
"evvXvQP8Hkue1poOFtnEtpyxVLW1zAo6"+
"/1Xx1COxFvrc2d7UL/lmHInNlxuacJXw"+
"u0fjpXfz/YqYzBIBzD6WUfTIF9GRHpOn"+
"/Hz7saL8xz+W//FRAUid1OksQaQx4CMs"+
"8LOddcQhULW4ucetDf96JcR3g0gfRK4P"+
"C7E/r7Z6xNrXd2UIeorGj5Ef7b1pJAYB"+
"6Y5anaHqZ9J6nKEBvB4DnNLIVWSgARns"+
"/8wR2SiRS7MNACwTyrGvt9ts8p12PKFd"+
"lqYTopNHR1Vf7XjfhQlVsAJdNiKdYmYV"+
"oKlaRv85IfVunYzO0IKXsyl7JCUjCpoG"+
"20f0a04COwfneQAGGwd5oa+T8yO5hzuy"+
"Db/XcxxmK01EpqOyuxINew==";
String iv = "r7BXXKkLb8qrSNn05n0qiA==";
Base64.Decoder decoder = java.util.Base64.getDecoder();
// 算法名称
final String KEY_ALGORITHM = "AES";
// 加解密算法/模式/填充方式
final String algorithmStr = "AES/CBC/PKCS7Padding";
// 初始化
Security.addProvider(new BouncyCastleProvider());