public void testInvoke() {
        HashMap<String, Object> payload = new HashMap<String, Object>();
        HashMap<String, Object> payload1 = new HashMap<String, Object>();
        payload1.put("key1", "value1");
        payload.put("key2", payload1);
        payload.put("key3", "value3");
        byte[] payloadBytes = JsonUtils.toJsonString(payload).getBytes();
        String functionName = "test-1603961009154"; // 已经存在的函数名称
        InvokeResponse response = cfcClient.invoke(functionName, "RequestResponse", "Tail", null, payloadBytes);
        String res = new String(response.getPayload());
        System.out.println(res);

    }