出于某种原因，当我取消注释行 //restApi.setProxy(new URI("http://myproxy.mycompany.com"),"MyProxyUsername", "MyProxyPassword"); 输入正确，错误消失.对于所有需要输入的人，请输入以下内容:

For some reason when I uncomment the line //restApi.setProxy(new URI("http://myproxy.mycompany.com"), "MyProxyUsername", "MyProxyPassword"); with correct inputs, the error goes off. For all those who need the inputs, please put in the following:

restApi.setProxy(new URI("http://rally1.rallydev.com"), "xyz@abc.com", "rallypassword");

所以工作代码如下:

import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.conn.ssl.TrustStrategy;
import com.rallydev.rest.RallyRestApi;
import com.rallydev.rest.client.HttpClient;
import com.rallydev.rest.request.GetRequest;
import com.rallydev.rest.response.GetResponse;

public class ConnnectionTestWithHTTPClient {

    public static void main(String[] args) throws URISyntaxException, IOException {


        String host = "https://rally1.rallydev.com";
        String apiKey = "_apikey"; 
        String applicationName = "Connnection Test With HTTPClient";
        RallyRestApi restApi = new RallyRestApi(new URI(host),apiKey);
        restApi.setApplicationName(applicationName); 
        restApi.setProxy(new URI("http://rally1.rallydev.com"), "abc@abc.com", "rallypassword");  //YOUR PROXY SETTINGS HERE
        HttpClient client = restApi.getClient();
        try {
            SSLSocketFactory sf = new SSLSocketFactory(new TrustStrategy() {
                public boolean isTrusted(X509Certificate[] certificate, String authType)
                    throws CertificateException {
                    //trust all certs
                    return true;
                }
            }, SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
            client.getConnectionManager().getSchemeRegistry().register(new Scheme("https", 443, sf));

            String workspaceRef = "/workspace/1234"; 
            GetRequest getRequest = new GetRequest(workspaceRef);
            GetResponse getResponse = restApi.get(getRequest);
            System.out.println(getResponse.getObject());
        } catch (Exception e) {
            System.out.println(e);
        } finally {
            restApi.close();
        }   
    } 
}