验证到JIRA服务器时出现未知主机异常

Question

我一直在尝试对JIRA服务器进行身份验证，并在互联网上检查了多种方式。但我总是得到例外。我是REST和球衣的新手。

请在我出错的地方帮忙。

以下是代码段：

package jiratest;

import com.sun.jersey.api.client.Client;
import com.sun.jersey.api.client.ClientResponse;
import com.sun.jersey.api.client.WebResource;
import com.sun.jersey.api.client.filter.HTTPBasicAuthFilter;

public class JIRA1 {

    public static void main(String [] args)
    {
        Client client = Client.create();
        client.addFilter(new HTTPBasicAuthFilter("admin", "admin"));
        WebResource webResource = client.resource("https://project.atlassian.net/");
        ClientResponse response = webResource.type("application/json").accept("application/json").get(ClientResponse.class);
        System.out.println("Connected");
    }
}

我总是得到以下例外：

Exception in thread "main" com.sun.jersey.api.client.ClientHandlerException: java.net.UnknownHostException: project.atlassian.net
    at com.sun.jersey.client.urlconnection.URLConnectionClientHandler.handle(URLConnectionClientHandler.java:148)
    at com.sun.jersey.api.client.filter.HTTPBasicAuthFilter.handle(HTTPBasicAuthFilter.java:81)
    at com.sun.jersey.api.client.Client.handle(Client.java:642)
    at com.sun.jersey.api.client.WebResource.handle(WebResource.java:601)
    at com.sun.jersey.api.client.WebResource.access$200(WebResource.java:74)
    at com.sun.jersey.api.client.WebResource$Builder.get(WebResource.java:459)
    at jiratest.JIRA1.main(JIRA1.java:15)
Caused by: java.net.UnknownHostException: project.atlassian.net
    at java.net.AbstractPlainSocketImpl.connect(Unknown Source)
    at java.net.PlainSocketImpl.connect(Unknown Source)
    at java.net.SocksSocketImpl.connect(Unknown Source)
    at java.net.Socket.connect(Unknown Source)
    at sun.security.ssl.SSLSocketImpl.connect(Unknown Source)
    at sun.security.ssl.BaseSSLSocketImpl.connect(Unknown Source)
    at sun.net.NetworkClient.doConnect(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.http.HttpClient.openServer(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.<init>(Unknown Source)
    at sun.net.www.protocol.https.HttpsClient.New(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.getNewHttpClient(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
    at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(Unknown Source)
    at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
    at java.net.HttpURLConnection.getResponseCode(Unknown Source)
    at sun.net.www.protocol.https.HttpsURLConnectionImpl.getResponseCode(Unknown Source)
    at com.sun.jersey.client.urlconnection.URLConnectionClientHandler._invoke(URLConnectionClientHandler.java:239)
    at com.sun.jersey.client.urlconnection.URLConnectionClientHandler.handle(URLConnectionClientHandler.java:146)
    ... 6 more