Java HTTP客户端请求设置超时时间。

Question

我想设置请求的超时时间。这是我目前的代码。

final HttpClient httpclient = HttpClients.createDefault();
final HttpPost httppost = new HttpPost(address);
httppost.setHeader("Accept", "text/xml");
httppost.setHeader("Content-type", "application/xml; charset=UTF-8");
httppost.setEntity(new StringEntity(body));
final HttpResponse response = httpclient.execute(httppost);
final HttpEntity entity = response.getEntity();

我已经尝试过（不起作用，一直在加载并忽略超时）。

// set the connection timeout value to 30 seconds (30000 milliseconds)
final HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(httpParams, 30000);
client = new DefaultHttpClient(httpParams);

而且（这个会抛出java.lang.UnsupportedOperationException）

httpclient = HttpClients.createDefault();
httpclient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 3000);
httpclient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 6000);

有没有其他设置超时的方法？我不需要真正的响应，因此类似于异步请求之类的东西也可以。

- Niklas

---

这不对吗？final HttpClient httpclient; = HttpClients.createDefault(); 你多了一个分号。 - SpringLearner

你尝试过使用 CoreConnectionPNames.TIMEOUT 吗？ - christopher

@christopher .TIMEOUT.不存在。 - Niklas

抱歉，我的意思是 ConnManagerPNames.TIMEOUT。 - christopher

@christopher 然后我再次收到 java.lang.UnsupportedOperationException。 - Niklas

Answer 1

Apache的HttpClient具有两个独立的超时时间：等待建立TCP连接的超时时间和等待下一个数据字节的超时时间。

HttpConnectionParams.setConnectionTimeout()用于建立TCP连接，而HttpConnectionParams.setSoTimeout()用于等待下一个数据字节时的超时。

// Creating default HttpClient
HttpClient httpClient = new DefaultHttpClient();
final HttpParams httpParams = httpClient.getParams();

// Setting timeouts
HttpConnectionParams.setConnectionTimeout(httpParams, 5000);
HttpConnectionParams.setSoTimeout(httpParams, 30000);

// Rest of your code
final HttpPost httppost = new HttpPost(address);
httppost.setHeader("Accept", "text/xml");
httppost.setHeader("Content-type", "application/xml; charset=UTF-8");
httppost.setEntity(new StringEntity(body));
final HttpResponse response = httpclient.execute(httppost);
final HttpEntity entity = response.getEntity();

- Shishir Kumar