Java异常java.net.SocketTimeoutException：连接超时

Question

我有以下代码

public static void main(String[] args) {
    Connection connection = Jsoup.connect("http://prospective.bryantschools.org/");
    connection.timeout(5000); 

    Document doc;
    try {


        doc = Jsoup.connect("http://prospective.bryantschools.org/").get();

        // get page title
        String title = doc.title();
        System.out.println("title : " + title);

        // get all links
        Elements links = doc.select("a[href]");
        for (Element link : links) {

            // get the value from href attribute
            System.out.println("\nlink : " + link.attr("href"));
            System.out.println("text : " + link.text());

        }

    } catch (IOException e) {
        e.printStackTrace();
    }

}

我收到以下错误

    java.net.SocketTimeoutException: connect timed out
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
at java.net.Socket.connect(Socket.java:589)
at sun.net.NetworkClient.doConnect(NetworkClient.java:175)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:432)
at sun.net.www.http.HttpClient.openServer(HttpClient.java:527)
at sun.net.www.http.HttpClient.<init>(HttpClient.java:211)
at sun.net.www.http.HttpClient.New(HttpClient.java:308)
at sun.net.www.http.HttpClient.New(HttpClient.java:326)
at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1168)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1104)
at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:998)
at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:932)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:512)
at org.jsoup.helper.HttpConnection$Response.execute(HttpConnection.java:493)
at org.jsoup.helper.HttpConnection.execute(HttpConnection.java:205)
at org.jsoup.helper.HttpConnection.get(HttpConnection.java:194)
at com.example.kaleb.testjsoup.HTMLParserExample1.main(HTMLParserExample1.java:25)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:140)

我环顾四周，许多人提到这可能是因为服务器的防火墙阻止了我的请求。 还有其他原因导致我会收到这些例外情况吗？ 我在代码中正在执行引起这些异常的事情吗？

Answer 1

试试Jsoup.connect(url).userAgent("Mozilla").get(); 。 我们的网络服务器阻止了它，因为它没有用户代理，并且阻止了非真实用户的请求。