来自一个 HttpURLConnection 的多个请求
如何使用 Java 在一个 HttpURLConnection 中执行多个请求？
URL url = new URL("http://my.com");
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
HttpURLConnection.setFollowRedirects( true );
connection.setDoOutput( true );
connection.setRequestMethod("GET");
PrintStream ps = new PrintStream( connection.getOutputStream() );
ps.print(params);
ps.close();
connection.connect();
//TODO: do next request with other url, but in same connection
谢谢。
How can I do several request in one HttpURLConnection with Java?
URL url = new URL("http://my.com");
HttpURLConnection connection = (HttpURLConnection)url.openConnection();
HttpURLConnection.setFollowRedirects( true );
connection.setDoOutput( true );
connection.setRequestMethod("GET");
PrintStream ps = new PrintStream( connection.getOutputStream() );
ps.print(params);
ps.close();
connection.connect();
//TODO: do next request with other url, but in same connection
Thanks.
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来自 Javadoc：
该物体显然不适合重复使用。
除了一点点内存消耗和效率低下之外，为您想要发出的每个请求打开一个 HttpURLConnection 并没有什么大问题。不过，如果您想要更大规模的高效网络 IO，那么最好使用专门的库，例如 Apache HttpClient。
From the Javadoc:
The object apparently isn't meant to be re-used.
Aside from a little memory thrashing and inefficiency, there's no big problem with opening one HttpURLConnection for every request you want to make. If you want efficient network IO on a larger scale, though, you're better off using a specialized library like Apache HttpClient.
除了正确答案之外，也许您真正想要的是重用底层 TCP 连接，即“持久连接”，JDK 的 HttpURLConnection 确实支持这种连接。因此，您不需要因此而使用其他 http 库；尽管还有其他合理的原因，可能是性能（但不一定，取决于用例、库）。
Beyond the correct answer, maybe what you actually want is reuse of the underlying TCP connection, aka "persistent connections", which are indeed supported by JDK's HttpURLConnection. So you don't need to use other http libs for that reason; although there are other legitimate reason, possibly performance (but not necessarily, depends on use case, library).