Java 从RESTfulWebService调用Servlet时出现问题

我正在使用Jersey开发RESTWeb服务，需要从web服务方法调用servlet来验证用户。运行以下代码时会出现异常：

@Path("/server")
public class WebServer {
    @Resource
    private WebServiceContext context;  

    @POST
    @Path("/post")
    @Consumes(MediaType.APPLICATION_JSON)
    public Response createTrackInJSON(Track track) throws IOException, ServletException { 
        ServletContext servletContext = (ServletContext) context.getMessageContext()
            .get(MessageContext.SERVLET_CONTEXT); // Here I am getting NPE

        HttpServletRequest request = (HttpServletRequest) context.getMessageContext()
            .get(MessageContext.SERVLET_REQUEST);

        HttpServletResponse response = (HttpServletResponse) context.getMessageContext()
            .get(MessageContext.SERVLET_RESPONSE);

        request.setAttribute("username", track.getUsername());
        request.setAttribute("password", track.getPassword());
        servletContext.getRequestDispatcher("/LoginAction").include(request, response);

        String loginStatus = request.getParameter("loginStatus");
        String Token = request.getParameter("Token");
        String result = ""+track;
        return Response.status(200).entity(result).build();
    }
}

例外情况是：

位于的java.lang.NullPointerException com.webservices.server.WebServer.createTrackInJSON（WebServer.java:36） …servletContext为空

请帮助我确定如何在web服务中获取servlet上下文

改用：

---

使用@Context注释，并注入正确的类。您还可以直接注入servlet请求和响应对象

import jax.ws.rs.core.Context;

@Path("/server")
public class WebServer {
    @Context 
    private ServletContext context; 

    @Context
    private HttpServletRequest request;

    @Context
    private HttpServletResponse response;

    // ...
}

---

感谢您的回复关于HttpServletRequest，HttpServletResponse如何获取这些对象。

import jax.ws.rs.core.Context;

@Path("/server")
public class WebServer {
    @Context 
    private ServletContext context; 

    @Context
    private HttpServletRequest request;

    @Context
    private HttpServletResponse response;

    // ...
}