java - 如何向另一个域发送请求并在 Spring MVC Controller 中获取响应正文？

Question

我有一些 Controller ，我需要将请求发送到另一个域并获取响应结果正文(每次都是html)。我该怎么做？ HttpURLConnection 是唯一的解决方案吗？

 @RequestMapping("/")
public ModelAndView mainPage(){
    ModelAndView view = new ModelAndView("main");

    String conten = /*Here is request result to another domain(result is just html, not JSON)*/

    view.addAttribute("statistic","conten);
    return view;
}

Answer 1

以下是发出请求的示例:

    String url = "http://www.google.com/";

    URL url= new URL(url);
    HttpURLConnection con = (HttpURLConnection) url.openConnection();

    // optional default is GET
    con.setRequestMethod("GET");

    //add request header
    con.setRequestProperty("User-Agent", USER_AGENT);

    int responseCode = con.getResponseCode();

    BufferedReader in = new BufferedReader(
            new InputStreamReader(con.getInputStream()));
    String inputLine;

    // Important to be thread-safe
    StringBuffer response = new StringBuffer();

    while ((inputLine = in.readLine()) != null) {
        response.append(inputLine);
    }
    in.close();

    //print html string
    System.out.println(response.toString());