在我的Springboot应用程序中，我使用RequestDispatcher forward将请求和响应发送到远程服务。现在我需要得到response和request作为字符串来记录到数据库。request和response都包含JSON数据。

RequestDispatcher requestDispatcher = request.getRequestDispatcher(configAPI.getUserByPhoneUrl());
requestDispatcher.forward(request, response);

RequestDispatcher将就地修改响应。因此，在forward()函数之后，我无法从requestDispatcher.forward(request, response)创建的响应中获取json。

@RequestMapping(value = "/getUserByPhone", method = {RequestMethod.GET}, produces = "application/json;charset=utf-8")
    public void getUserbyIsdn(HttpServletRequest request, HttpServletResponse response) {
            // Forward the request to the remote service
            RequestDispatcher requestDispatcher = request.getRequestDispatcher(configAPI.getUserByPhoneUrl());
            requestDispatcher.forward(request, response);
            // response now has result from remote service
            // TODO: print out json in response here
    }

有没有关于如何获得响应作为json的想法？
我尝试使用HttpServletResponseWrapper访问响应，但无法访问。使用HttpServletResponseWrapper的示例代码：

HttpServletRequestWrapper requestWrapper = new HttpServletRequestWrapper(request);
            HttpServletResponseWrapper responseWrapper = new HttpServletResponseWrapper(response);
            // Forward the request to the remote service
            request.getRequestDispatcher(configAPI.getUserByPhoneUrl()).forward(requestWrapper, responseWrapper);

但由于未设置ApplicationContext请求，因此导致NullPointerException。