从 Spring 控制器调用不同的主机

Question

我的本地主机是：http://localhost:8585/api/getproducts 我在 ProductController 中使用 @Requestmapping(/api/getproducts) 来访问我的产品页面。

单击按钮后，我需要在不同的主机上调用 api： http://10.120.130.22:9292/ 我尝试在新控制器中使用以下代码来调用主机：

@RequestMapping("Trainer/reStaff/")
@RequestMapping(method = RequestMethod.POST)
    public @ResponseBody response(@RequestParam("trainingId") final int trainingId, HttpServletRequest request)
                                                                                    throws ClientProtocolException, IOException {

        String hostname="http://10.120.130.22:9292/";
        CloseableHttpClient httpclient = HttpClients.custom().build();
        CloseableHttpResponse response=null;

        try{
            String uri=hostname+"Trainer/reStaff/?trainingId="+trainingId;
            HttpPost httpPost = new HttpPost(uri);
            httpPost.setHeader("Accept", "application/json");
            httpPost.setHeader("Content-Type", "application/json");
            response = httpclient.execute(httpPost);
            String responseData = EntityUtils.toString(response.getEntity());
            if(response.getStatusLine().getStatusCode()==200)
                System.out.println(responseData+"\n");              
            else
                System.out.println("Error :" + responseData+"\n");


        }finally {
            httpclient.close();
            response.close();
        }

但我收到错误消息：

HTTP 状态 404 -

类型状态报告

消息

描述请求的资源不可用。

如何从我的控制器调用新主机？

Answer 1

我明白这是怎么回事了。我们需要在服务层通过httpPost传递url :

HttpPost httpPost = new HttpPost(hostUri); JsonObject jsonResponse = null;

    try {
        String httpRequestBody = jsonRequestBuilder.build().toString();
        logger.info("Request Body: " + httpRequestBody);

        CloseableHttpClient httpClient = HttpClients.custom().setConnectionManager(connManager).build();
        httpPost.setHeader("Content-Type", "application/json");
        httpPost.setHeader("Accept", "application/json");
        httpPost.setEntity(new StringEntity(httpRequestBody));
        HttpResponse httpResponse = httpClient.execute(httpPost);
        logger.debug("Response Status: " + httpResponse.getStatusLine().getStatusCode());
        BufferedReader reader = new BufferedReader(new InputStreamReader(httpResponse.getEntity().getContent()));
        String line;
        StringBuffer httpResponseBody = new StringBuffer();
        while ((line = reader.readLine()) != null) {
            httpResponseBody.append(line);
        }
        logger.info("Response Body: " + httpResponseBody.toString());
        JsonReader jsonReader = Json.createReader(new StringReader(httpResponseBody.toString()));
        jsonResponse = jsonReader.readObject();
        jsonReader.close();
    } catch (Exception ex) {
        logger.error("Error occurred while invoking POST on ep: " + hostUrl, ex);
    } finally {
        httpPost.releaseConnection();
    }
    logger.debug("Exiting");
    return jsonResponse;

从 Spring 控制器调用不同的主机

Calling a different host from Spring Controller

mapping

spring

controller

response

request

HTTP 状态 404 -