当执行 POST HTTP 方法时，"Response.status(Status.CREATED)" 被 eclipse 识别为类型 "Response" 未定义

Question

我学习本教程是为了学习如何编写 RESTful Web 服务代码 - tutorial. Here we are trying to send the status code 201 Created along with the posting of a new message through Postman。当我写他在 4:47 上写的代码行时，我在 eclipse oxygen 中遇到错误：

      CREATED cannot be resolved or is not a field

我浏览了文档，但找不到正确的输入方式。也尝试导入更多 Response classes，但这并没有解决问题。

这是出现问题的代码：

    return Response.status(Status.CREATED)
            .entity(newMessage)
            .build();

这是全部class:

    `import java.net.URI;
     import java.util.List;

     import javax.net.ssl.SSLEngineResult.Status;
     import javax.ws.rs.BeanParam;
     import javax.ws.rs.Consumes;
     import javax.ws.rs.DELETE;
     import javax.ws.rs.GET;
     import javax.ws.rs.POST;
     import javax.ws.rs.PUT;
     import javax.ws.rs.Path;
     import javax.ws.rs.PathParam;
     import javax.ws.rs.Produces;
     import javax.ws.rs.QueryParam;
     import javax.ws.rs.core.Context;
     import javax.ws.rs.core.MediaType;
     import javax.ws.rs.core.UriInfo;
     import javax.ws.rs.core.Response.ResponseBuilder;

     import org.hristo.javabrains.messenger.model.Message;
     import org.hristo.javabrains.messenger.resources.beans.MessageFilterBean;
     import org.hristo.javabrains.messenger.service.MessageService;

     import com.sun.research.ws.wadl.Response;

     @Path("messages")
     @Consumes(MediaType.APPLICATION_JSON)
     @Produces(MediaType.APPLICATION_JSON)
     public class MessageResource {

     MessageService messageService = new MessageService();


@GET
public List<Message> getMessages(@BeanParam MessageFilterBean filterBean) {
    if(filterBean.getYear() > 0) {
        return messageService.getAllMessagesForYear(filterBean.getYear());
    }
    if(filterBean.getStart() >= 0 && filterBean.getSize() >= 0) {
        return messageService.getAllMessagesPaginated(filterBean.getStart(), filterBean.getSize());
    }
    return messageService.getAllMessages();
}

@POST
public Response addMessage(Message message, @Context UriInfo uriInfo) {

    Message newMessage = messageService.addMessage(message);
    String newId = String.valueOf(newMessage.getId());
    URI uri = uriInfo.getAbsolutePathBuilder().path(newId).build();
    return Response.status(Status.CREATED)
            .entity(newMessage)
            .build();
}

@PUT
@Path("{messageId}")    
public Message updateMessage(@PathParam("messageId") long messageId, Message message) {
    message.setId(messageId);
    return messageService.updateMessage(message);
}

@DELETE
@Path("{messageId}")
public Message removeMessage(@PathParam("messageId") long messageId) {
    return messageService.removeMessage(messageId);
}


@GET
@Path("{messageId}")
public Message getMessage(@PathParam("messageId") long messageId) {
    return messageService.getMessage(messageId);
}

@Path("{messageId}/comments")
public CommentResource getCommentResource() {
    return new CommentResource();
} }

Answer 1

Response 导入应该是 javax.ws.rs.core.Response 而 Status 是 Response 的静态内部 class。所以要么导入静态 Response.Status 要么只使用 Response.Status 而不是 Status.

更多信息，请参考javadoc。

当执行 POST HTTP 方法时，"Response.status(Status.CREATED)" 被 eclipse 识别为类型 "Response" 未定义

When performing a POST HTTP method the "Response.status(Status.CREATED)" is recognised as undefined for the type "Response" by eclipse

java

rest

http-status-code-200