无法连接到 gateway.watsonplatform.net:443

Question

我正在尝试按照上面的描述运行示例 java 应用程序

https://www.ibm.com/smarterplanet/us/en/ibmwatson/developercloud/doc/getting_started/gs-full-java.shtml

我已经能够正确设置我的 liberty 服务器，并且我已经能够使用我的帐户在 bluemix 服务器上创建一个应用程序。当我尝试在 Eclipse 中运行示例代码时，我可以看到 watson q&a 应用程序界面。但是当我点击询问按钮时，我得到了

Error: Connect to gateway.watsonplatform.net:443 [gateway.watsonplatform.net/23.246.237.54] failed: Connection timed out: connect

除了输入我的服务的 url 以及用户名和密码的值之外，我没有对代码进行任何更改。

我需要设置另一个系统属性吗？

编辑：manifest.yaml

applications:
 - services:
  - question_and_answer
  name: myDumbApp
  path: webApp.war
  memory: 512M

还有，当我运行命令时

cf marketplace -s question_and_answer

我明白了

service plan                    description   free or paid
question_and_answer_free_plan   Beta          free

对吗？

编辑：试用 QuestionAndAnswer api

import java.util.HashMap;
import java.util.Map;

import com.ibm.watson.developer_cloud.personality_insights.v2.PersonalityInsights;
import com.ibm.watson.developer_cloud.personality_insights.v2.model.Profile;
import com.ibm.watson.developer_cloud.question_and_answer.*;
import com.ibm.watson.developer_cloud.question_and_answer.v1.QuestionAndAnswer;
import com.ibm.watson.developer_cloud.question_and_answer.v1.model.QuestionAndAnswerDataset;

public class PersonalityInsightsExample {
public static void main(String[] args) {

    QuestionAndAnswer qas = new QuestionAndAnswer();
    qas.setUsernameAndPassword("uName", "Pass");
    QuestionAndAnswerDataset qd = new QuestionAndAnswerDataset("TRAVEL");

    /*
    PersonalityInsights service = new PersonalityInsights();
    service.setUsernameAndPassword("uName", "Pass");

    String myProfile = "Call me Ishmael. Some years ago-never mind how long "
            + "precisely-having little or no money in my purse, and nothing "
            + "particular to interest me on shore, I thought I would sail about "
            + "a little and see the watery part of the world. It is a way "
            + "I have of driving off the spleen and regulating the circulation. "
            + "Whenever I find myself growing grim about the mouth; whenever it "
            + "is a damp, drizzly November in my soul; whenever I find myself "
            + "involuntarily pausing before coffin warehouses, and bringing up "
            + "the rear of every funeral I meet; and especially whenever my "
            + "hypos get such an upper hand of me, that it requires a strong "
            + "moral principle to prevent me from deliberately stepping into "
            + "the street, and methodically knocking people's hats off-then, "
            + "I account it high time to get to sea as soon as I can.";


    Profile profile = service.getProfile(myProfile);
      */

    qas.setDataset(qd);

    System.out.println( qas.ask("How to get cold?"));
   }
}

但我还是得到了

SEVERE: IOException
org.apache.http.conn.HttpHostConnectException: Connection to https://gateway.watsonplatform.net refused

请注意，当我运行时

 System.out.println(qas.getEndPoint());

我明白了

https://gateway.watsonplatform.net/question-and-answer-beta/api

这与我代码中的导入一致吗？

Answer 1

确保您拥有服务凭证并且您没有使用您的 Bluemix username 和 password。

由于您想使用 Personality-Insights，我建议您首先从 Main 类开始，并尝试查看您是否拥有有效的凭据

在本地运行 Personality Insights

1. 下载Watson Developer Cloud Java SDK v1.1.1。
2. 在 Eclipse 中，创建一个 java 项目（无 web，纯 java）。
3. 创建一个文件并将其命名为PersonalityInsightsExample.java。

4. 复制下面的代码。

   导入 java.util.HashMap; 导入 java.util.Map； 导入 com.ibm.watson.developer_cloud.personality_insights.v2.model.Profile；

   公开课 PersonalityInsightsExample {

   public static void main(String[] args) {
       PersonalityInsights service = new PersonalityInsights();
       service.setUsernameAndPassword("<username>", "<password>");
   
       String myProfile = "Call me Ishmael. Some years ago-never mind how long "
               + "precisely-having little or no money in my purse, and nothing "
               + "particular to interest me on shore, I thought I would sail about "
               + "a little and see the watery part of the world. It is a way "
               + "I have of driving off the spleen and regulating the circulation. "
               + "Whenever I find myself growing grim about the mouth; whenever it "
               + "is a damp, drizzly November in my soul; whenever I find myself "
               + "involuntarily pausing before coffin warehouses, and bringing up "
               + "the rear of every funeral I meet; and especially whenever my "
               + "hypos get such an upper hand of me, that it requires a strong "
               + "moral principle to prevent me from deliberately stepping into "
               + "the street, and methodically knocking people's hats off-then, "
               + "I account it high time to get to sea as soon as I can.";
   
       Profile profile = service.getProfile(myProfile);
       System.out.println(profile);
   }
   

   }

5. 替换username和password。

6. 将其作为 Java 应用程序运行。

---

如果执行上述步骤后仍然出现错误，请尝试打开浏览器并转到：https://gateway.watsonplatform.net/personality-insights/api/v2/profile，您应该会收到密码提示。

Answer 2

我尝试使用上面建议的 PersonalityInsightsExample 时遇到了同样的错误，但似乎太复杂了，因为我发现问题是我的网络必须有代理才能连接到外部端点。因此，只需添加我的代理详细信息即可解决问题：

System.setProperty("http.proxyHost",HOST);
System.setProperty("http.proxyPort",PORT);
System.setProperty("https.proxyHost",HOST);
System.setProperty("https.proxyPort",PORT);