使用策略模式避免八种http请求方式多重判断

        if (Consts.API.REQUEST_METHOD_POST.equals(frontendMessage.getRequestMethod().toUpperCase())) {
            // post请求实现
            return doPost(exchange);
        }
        else if (Consts.API.REQUEST_METHOD_GET.equals(frontendMessage.getRequestMethod().toUpperCase())) {
            // get请求实现
            return doGet(exchange);
        }
        else if (Consts.API.REQUEST_METHOD_PUT.equals(frontendMessage.getRequestMethod().toUpperCase())) {
            // put请求实现
            return doPut(exchange);
        }
        else if (Consts.API.REQUEST_METHOD_PATCH.equals(frontendMessage.getRequestMethod().toUpperCase())) {
            // patch请求实现
            return doPatch(exchange);
        }
        else if (Consts.API.REQUEST_METHOD_DELETE.equals(frontendMessage.getRequestMethod().toUpperCase())) {
            // delete请求实现
            return doDelete(exchange);
        }

   

// httpclient写法
HttpMethod method = HttpMethod.valueOf(frontendMessage.getRequestMethod().toUpperCase());
            return webClient.method(method)

// httpclient5写法
HttpUriRequestBase request = new HttpUriRequestBase(frontendMessage.getRequestMethod().toUpperCase(), uri);
CloseableHttpResponse response = httpclient.execute(request);