java - HTTPConnection何时执行以及它的状态是什么

Question

我有下面的代码，它从HttpURLConnection生成OutputStream 当实际执行连接时，如何检查其状态？

  HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
  httpCon.setDoOutput(true);
  httpCon.setRequestMethod("PUT");
  httpCon.addRequestProperty("X-Auth-Token", getAuthToken());
  httpCon.setDoInput(true);
  httpCon.setRequestProperty("Connection", "close");
  httpCon.setReadTimeout(READ_TIMEOUT);
  httpCon.setRequestProperty("Transfer-Encoding","chunked");
  httpCon.setDoOutput(true);
  httpCon.setChunkedStreamingMode(STREAMING_CHUNK);
  mOutputStream  = httpCon.getOutputStream();

Answer 1

当您获取其中一个流或响应代码，或调用 connect() 时，就会创建底层 TCP 连接(或从连接池分配)。 HttpURLConnection 对象本身不是 TCP 连接。