java微信小程序 获取用户信息以及手机号

注册开发者 获取appid 和 appSecret

获取code 发送后台获取openid 和sessionKey（获取用户信息）

用sessionKey iv encrypetdData 传到后台进行解密 得到手机号

获取用户信息java代码

Map<String, String> params = new HashMap<String, String>();
    params.put("appid", appid);
    params.put("secret", appSecret);
    params.put("grant_type", grantType);
    params.put("js_code", code);

    String resultStr = HttpUtil.httpsGet(this.code2SessionUrl, params);

    Map<String, Object> result = JsonUtils.parseJSON2Map(resultStr);

    if (result.containsKey("errcode")) {
        Integer errorCode = (Integer) result.get("errcode");
        throw new ServiceException(errorCode.toString());
    }

    String openId = (String) result.get("openid");
    String sessionKey = (String) result.get("session_key");


    // 每次获取新的sessionKey后更新缓存
    this.setSessionKeyCache(openId, sessionKey);

    MiniProgramLoginInfo info = new MiniProgramLoginInfo();

    info.setOpenId(openId);

    Member member = this.getMemberByOpenId(openId);

    if (null != member) {
        Long memberId = member.getId();
        info.setMemberId(memberId.toString());
        info.setMobileNo(member.getMobile());
    }

    return info;
}

获取用户手机号java代码

private JSONObject decryptData(String encryptedData, String sessionKey, String iv) throws Exception {
    byte[] dataByte = Base64.decodeBase64(encryptedData);
    // 加密秘钥
    byte[] keyByte = Base64.decodeBase64(sessionKey);
    // 偏移量
    byte[] ivByte = Base64.decodeBase64(iv);
    try {
        // 如果密钥不足16位，那么就补足.  这个if 中的内容很重要
        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
        // 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);// 初始化
        byte[] resultByte = cipher.doFinal(dataByte);
        if (null != resultByte && resultByte.length > 0) {
            String result = new String(resultByte, "UTF-8");
            return JSONObject.fromObject(result);
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

获取手机号时 个人开发者是没有权限的 encryptedData 和 iv 发送到后台的数据如果带 + 号会被解析成空格 所以要进行转换再解密