ibm-cloud - MessageResponse 在 Watson Conversation 中返回空指针

Question

MessageResponse 给出 NullPointerException。

ConversationService service = new ConversationService(ConversationService.VERSION_DATE_2016_09_20);
// Credentials of Workspace of Conversation
service.setApiKey("API_KEY");
service.setUsernameAndPassword("USERNAME", "PASSWORD");
MessageRequest newMessage = new MessageRequest.Builder()
  .inputText(request.getQuery())
  .build();

// Workspace ID of Conversation current workspace
String workspaceId = "WORKSPACEID";
service.setSkipAuthentication(true);
MessageResponse response = service.message(workspaceId, newMessage)
  .execute();

Answer 1

根据 IBM 开发人员 (@German) 的说法:“Watson 服务当前使用基本身份验证，因此您将使用用户名和密码而不是 api_key。为了获取凭据，您需要绑定(bind)要使用的服务(例如，问题和答案)到 Bluemix 应用程序。”

检查以下示例。

尝试使用 Java SDK 中的以下代码:

ConversationService service = new ConversationService(ConversationService.VERSION_DATE_2017_05_26);
service.setUsernameAndPassword("<username>", "<password>"); //Please make sure if this username and password is the Service Credentials from the Service that you have created to use Conversation

InputData input = new InputData.Builder("Hi").build();
MessageOptions options = new MessageOptions.Builder(workspaceId).input(input).build();

// sync
MessageResponse response = service.message(options).execute();
System.out.println(response);

其他示例:

MessageRequest newMessage = new MessageRequest.Builder().inputText(input).context(context).build();

MessageResponse response = service.message(WORKSPACE_ID,newMessage).execute();

context = response.getContext();    
System.out.println(response);

• 您可以查看官方 example使用 Watson Conversation。
• 请参阅使用 Watson 服务的入门指南(第 5 步)here .