jirster注入servlet

我創建了一個servlet，但我無法注入一個存儲庫對象。有沒有人有這個問題？jirster注入servlet

我的配置在WebConfigurer：

@Override 
public void onStartup(ServletContext servletContext) throws ServletException { 
    log.info("Web application configuration, using profiles: {}", Arrays.toString(env.getActiveProfiles())); 
    // Create the dispatcher servlet's Spring application context 
    AnnotationConfigWebApplicationContext dispatcherServlet = new AnnotationConfigWebApplicationContext(); 
    dispatcherServlet.register(WebMvcAutoConfiguration.class); 

    // Register and map the dispatcher servlet 
    ServletRegistration.Dynamic dispatcher = servletContext.addServlet("dispatcher", new DispatcherServlet(dispatcherServlet)); 
    dispatcher.setLoadOnStartup(1); 
    dispatcher.addMapping("/");

我的servlet：

@WebServlet(urlPatterns = "/servlet/preview") 
    public class ServletPreViewHtml extends HttpServlet { 
     private static final long serialVersionUID = 1L; 

     @Autowired 
     private PagecontentRepository pagecontentRepository; 

     public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException{ 
      doGet(request,response); 
     } 
     public void doGet(HttpServletRequest request, HttpServletResponse response) throws IOException{ 
      response.setContentType("text/html"); 
      PrintWriter out = response.getWriter(); 
      Pagecontent p = pagecontentRepository.getOne(2l); //line 34 
      out.println(p.getFullHtml());

總是返回我下面的錯誤：