如何以编程方式测试HTTP连接？
问题描述：
使用Java，如何测试URL是否可联系，并返回有效的响应？
Using Java, how can I test that a URL is contactable, and returns a valid response?
http://stackoverflow.com/about
答
作为单元测试的解决方案：
The solution as a unit test:
public void testURL() throws Exception {
String strUrl = "http://stackoverflow.com/about";
try {
URL url = new URL(strUrl);
HttpURLConnection urlConn = (HttpURLConnection) url.openConnection();
urlConn.connect();
assertEquals(HttpURLConnection.HTTP_OK, urlConn.getResponseCode());
} catch (IOException e) {
System.err.println("Error creating HTTP connection");
e.printStackTrace();
throw e;
}
}