// 1. 从http请求中获取加解密参数
            String msg_signature = request.getParameter("msg_signature");
            if (msg_signature == null) {
                msg_signature = request.getParameter("signature");
            }
            String timeStamp = request.getParameter("timeStamp");
            if (timeStamp == null) {
                timeStamp = request.getParameter("timestamp");
            }
            String nonce = request.getParameter("nonce");
            String encrypt = bodyJson.getString("encrypt");

            // 2. 使用加解密类型
            DingCallbackCrypto callbackCrypto = new DingCallbackCrypto(TOKEN, AES_KEY, OWNER_KEY);
            final String decryptMsg = callbackCrypto.getDecryptMsg(msg_signature, timeStamp, nonce, encrypt);

            // 3. 反序列化回调事件json数据
            JSONObject eventJson = JSON.parseObject(decryptMsg);
            String eventType = eventJson.getString("EventType");

            // 4. 根据EventType分类处理
            if ("check_url".equals(eventType)) {
                // 测试回调url的正确性
            } else if ("user_add_org".equals(eventType)) {
                // 处理通讯录用户增加时间
            } else {
                // 添加其他已注册的
            }

            // 5. 返回success的加密数据
            Map<String, String> successMap = callbackCrypto.getEncryptedMap("success");
            return successMap;