HttpURLConnection方法总是GET吗？

Question

HttpURLConnection方法总是GET吗？

3

根据Android文档，我已经设置了setDoOutPut(true);以便连接作为POST发送。然而，在调试程序时，当我检查HTTPURLConnection方法成员时，它总是GET，即使在设置了setDoOutput(true)和setRequestMethod("POST")之后。我是否不小心将其重置为GET？

URL url = new URL(serverAddr);
HttpURLConnection urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setDoOutput(true);
urlConnection.setRequestMethod(verb);
urlConnection.setFixedLengthStreamingMode(postBody.getBytes().length);
//urlConnection.setRequestProperty("Content-Length", postBody.getBytes().toString());
urlConnection.setRequestProperty("Content-Type", "application/json;charset=utf-8");

urlConnection.connect();

OutputStream out = new BufferedOutputStream(urlConnection.getOutputStream());
out.write(postBody.getBytes());
out.flush();

int responseCode = urlConnection.getResponseCode();
System.out.println("HTTPS RESPONSE CODE: " + responseCode);

out.close();

编辑：这一定是一个 Bug……调试器清楚地显示 setDoOutput 成员变量为 false，即使我将其设置为 true。它没有被设置！

- ShrimpCrackers

什么是“动词”？你确认它确实发出了GET请求而不是POST请求吗？ - dylan7

动词“POST”被传入，我该如何验证呢？响应代码返回400，但我不确定是错误的GET请求还是错误的POST请求。 - ShrimpCrackers

请尝试以下代码：

URL url = new URL(address);
urlConnection = (HttpURLConnection) url.openConnection();
urlConnection.setDoOutput(true);
urlConnection.setRequestProperty("Content-Type", ...);
OutputStream outputStream = new BufferedOutputStream(urlConnection.getOutputStream());
BufferedWriter writer = new BufferedWriter(new OutputStreamWriter(outputStream, "utf-8"));
writer.write(requestBody);
writer.flush();
writer.close();
outputStream.close();

- BNK

对我来说，在JDK1.8上有问题，但在JDK11上完美运行。 - undefined

大家好，这是我多年前的帖子。如果你正在阅读这篇文章，请使用Retrofit！除非必须，不要使用原生的http！ - undefined

2个回答

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- David · Answer 1

如果您希望使用POST动词并发送请求数据，则需要使用urlConnection.setDoInput(true);。

http://developer.android.com/reference/java/net/URLConnection.html#setDoInput(boolean)

必须在建立连接之前设置。

- Selçuk Cihan · Answer 2

这是我的工作示例：

    url = new URL(requestURL);

    HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    conn.setReadTimeout(15000);
    conn.setConnectTimeout(15000);
    conn.setRequestMethod("POST");
    conn.setDoInput(true);
    conn.setDoOutput(true);


    OutputStream os = conn.getOutputStream();
    BufferedWriter writer = new BufferedWriter(
            new OutputStreamWriter(os, "UTF-8"));
    writer.write(getPostDataString(postDataParams));

    writer.flush();
    writer.close();
    os.close();
    int responseCode=conn.getResponseCode();
    Map<String, List<String>> mp = conn.getHeaderFields();

    if (responseCode == HttpsURLConnection.HTTP_OK) {
        String line;
        BufferedReader br=new BufferedReader(new InputStreamReader(conn.getInputStream()));
        while ((line=br.readLine()) != null) {
            response+=line;
        }
    }