Java 如何以编程方式测试 HTTP 连接？
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How can I programmatically test an HTTP connection?
提问by brasskazoo
Using Java, how can I test that a URL is contactable, and returns a valid response?
使用 Java，如何测试 URL 是否可联系并返回有效响应？
http://stackoverflow.com/about
采纳答案by brasskazoo
The solution as a unit test:
作为单元测试的解决方案：
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;
}
}
回答by John T
Since java 5 if i recall, the InetAdress class contains a method called isReachable(); so you can use it to make a ping implementation in java. You can also specify a timeout for this method. This is just another alternative to the unit test method posted above, which is probably more efficient.
我记得从 java 5 开始，InetAdress 类包含一个名为 isReachable(); 的方法。所以你可以用它在java中进行ping实现。您还可以为此方法指定超时。这只是上面发布的单元测试方法的另一种替代方法，它可能更有效。
回答by Charif
import org.apache.commons.validator.UrlValidator;
public class ValidateUrlExample {
public static void main(String[] args) {
UrlValidator urlValidator = new UrlValidator();
//valid URL
if (urlValidator.isValid("http://www.mkyong.com")) {
System.out.println("url is valid");
} else {
System.out.println("url is invalid");
}
//invalid URL
if (urlValidator.isValid("http://invalidURL^$&%$&^")) {
System.out.println("url is valid");
} else {
System.out.println("url is invalid");
}
}
}
Output:
输出：
url is valid url is invalid
source : http://www.mkyong.com/java/how-to-validate-url-in-java/
回答by Sam Ginrich
System.out.println(new InetSocketAddress("http://stackoverflow.com/about", 80).isUnresolved());
delivers falseif page is reachable, which is a precondition.
如果页面可访问，则传递false，这是前提条件。
In order to cover initial question completely, you need to implement a http getor post.
为了完全涵盖最初的问题，您需要实现http get或post。
