java - 如何在 Java 中构建 RESTful 请求

Question

我试图了解如何向服务器发送 REST 请求。如果我必须使用 httpconnections 或任何其他连接在 java 中将其实现为请求，我该怎么做？

    POST /resource/1
    Host: myownHost
    DATE: date
    Content-Type: some standard type 

这应该如何以标准方式构建？

    URL url= new URL("http://myownHost/resource/1");
    HttpsURLConnection connect= (HttpsURLConnection) url.openConnection();
    connect.setRequestMethod("POST");
    connect.setRequestProperty("Host", "myOwnHost");
    connect.setRequestProperty("Date","03:14:15 03:14:15 GMT");
    connect.setRequestProperty("Content-Type","application/x-www-form-urlencoded");

Answer 1

有很多选项，Apache HTTP 客户端 ( http://hc.apache.org/httpcomponents-client-4.4.x/index.html ) 是其中之一(并且使事情变得非常简单)

创建 REST 请求可以像这样简单(在本例中使用 JSON):

    DefaultHttpClient httpClient = new DefaultHttpClient();
    HttpGet getRequest = new HttpGet(
        "http://localhost:8080/RESTfulExample/json/product/get");
    getRequest.addHeader("accept", "application/json");

    HttpResponse response = httpClient.execute(getRequest);

    if (response.getStatusLine().getStatusCode() != 200) {
        throw new RuntimeException("Failed : HTTP error code : "
           + response.getStatusLine().getStatusCode());
    }

    BufferedReader br = new BufferedReader(
                     new   InputStreamReader((response.getEntity().getContent())));

更新:抱歉，文档链接已更新。发布了新链接。