Question

我正在尝试在我的应用程序中使用一个类。直到现在它正在使用HTTPClient类。但是现在HTTpClient类已经弃用了，我需要使用URLConnection类。我想替换下面的代码，但我没有得到如何做到这一点。任何人都可以让我知道。如何做到这一点是我目前的代码：

HttpClient httpClient = new DefaultHttpClient();
        HttpContext localContext = new BasicHttpContext();
        HttpPost httpPost = new HttpPost(url);
        HttpResponse response = httpClient.execute(httpPost, localContext);
        InputStream in = response.getEntity().getContent();
        DocumentBuilder builder = DocumentBuilderFactory.newInstance()
                .newDocumentBuilder();
        Document doc = builder.parse(in);

如何用HTTPClient类中的URLConnection类替换上面的代码？

Answer 1

以下是POST的示例：

template <template <typename> class list, typename Type>
void insertion( list<Type>& L ) 
{
  ...
}

有关详情，请浏览How to send HTTP request GET/POST in Java。

对于所有已弃用的类，请查看JavaDoc，它将提示用于替换旧代码的类。例如：

private void sendPost() throws Exception {

    String url = "your_url";
    URL obj = new URL(url);
    HttpsURLConnection con = (HttpsURLConnection) obj.openConnection();

    //add reuqest header
    con.setRequestMethod("POST");
    con.setRequestProperty("User-Agent", USER_AGENT);
    con.setRequestProperty("Accept-Language", "en-US,en;q=0.5");


    // Send post request
    con.setDoOutput(true);
    DataOutputStream wr = new DataOutputStream(con.getOutputStream());
    wr.writeBytes(urlParameters);
    wr.flush();
    wr.close();

    int responseCode = con.getResponseCode();
    System.out.println("\nSending 'POST' request to URL : " + url);
    System.out.println("Post parameters : " + urlParameters);
    System.out.println("Response Code : " + responseCode);

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

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

    //print result
    System.out.println(response.toString());

}

因此，我建议使用

...
*
* @deprecated (4.3) use {@link HttpClientBuilder}.  <----- THE HINT IS HERE !
*/
@ThreadSafe
@Deprecated
public class DefaultHttpClient extends AbstractHttpClient {

当HttpClientBuilder.create().build();方法返回build() -a CloseableHttpClient时，您可以将声明放在try-with-resources语句中（Java 7 +）：

AutoClosable

希望它有所帮助！

如何为HTTPClient弃用类使用新的URLConnection类

1 个答案: