兄弟 ,我也遇到同样问题,你解决了吗?

    @RequestMapping("/binding/mobilePhone")

    @ResponseBody

    public Object mobilePhone(HttpServletRequest request, String encryptedData,  String iv,  String session_key, String openid) {

//        System.out.println("encryptedData:"+encryptedData+"  iv:"+iv+"  session_key:"+session_key+"   openid:"+openid);

        JSONObject obj = this.weChatService.getPhoneNumber(session_key, encryptedData, iv);

        String phone = obj.get("phoneNumber").toString();

        User user = this.uuserService.getUser(openid);

        if (ToolUtil.isNotEmpty(user)) {

            user.setPhone(phone);

            return this.uuserService.update(user);

        }

        return null;

    }

public JSONObject getPhoneNumber(String session_key, String encryptedData, String iv) {
    byte[] dataByte = Base64.decode(encryptedData);
    byte[] keyByte = Base64.decode(session_key);
    byte[] ivByte = Base64.decode(iv);

    try {
        int base = 16;
        if (keyByte.length % base != 0) {
            int groups = keyByte.length / base + (keyByte.length % base != 0 ? 1 : 0);
            byte[] temp = new byte[groups * base];
            Arrays.fill(temp, (byte) 0);
            System.arraycopy(keyByte, 0, temp, 0, keyByte.length);
            keyByte = temp;
        }
        // 初始化
        Security.addProvider(new BouncyCastleProvider());
        Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
        SecretKeySpec spec = new SecretKeySpec(keyByte, "AES");
        AlgorithmParameters parameters = AlgorithmParameters.getInstance("AES");
        parameters.init(new IvParameterSpec(ivByte));
        cipher.init(Cipher.DECRYPT_MODE, spec, parameters);
        byte[] resultByte = cipher.doFinal(dataByte);
        if (null != resultByte && resultByte.length > 0) {
            String result = new String(resultByte, "UTF-8");
            return JSONObject.parseObject(result);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}