SpringBoot使用攔截器無效

附上代碼：

public class WendaWebConfiguration extends WebMvcConfigurerAdapter {

    @Autowired
    PassportInterceptor passportInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(passportInterceptor);
        super.addInterceptors(registry);
    }
}

@Component
public class PassportInterceptor implements HandlerInterceptor{

    private static final Logger logger = LoggerFactory.getLogger(PassportInterceptor.class);
    @Autowired
    private LoginTicketDAO loginTicketDAO;

    @Autowired
    private UserDAO userDAO;

    @Autowired
    private HostHolder hostHolder;

    @Override
    public boolean preHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o) throws Exception {
        String ticket = null;
        for(Cookie cookie: httpServletRequest.getCookies()){
            if("ticket".equals(cookie.getName())){
                ticket = cookie.getValue();
                break;
            }
        }
        if (ticket != null) {
            LoginTicket loginTicket = loginTicketDAO.selectByTicket(ticket);
            if (loginTicket == null || loginTicket.getExpired().before(new Date()) || loginTicket.getStatus() != 0) {
                return true;
            }

            User user = userDAO.selectById(loginTicket.getUserId());
            logger.info("user:"+user.getName());

            hostHolder.setUser(user);
        }
        return true;
    }

    @Override
    public void postHandle(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, ModelAndView modelAndView) throws Exception {
        if(modelAndView!=null&&hostHolder.getUser()!=null){
            modelAndView.addObject("user",hostHolder.getUser());
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) throws Exception {
        hostHolder.clear();
    }
}header.html:

#if(!$user)
<ul class="topnav-noauth clearfix">
    <li>
        <a href="/reglogin">注冊/登陸</a>
    </li>
</ul>
#else
...

測試運行：

期望的結果是如下：

 

 

代碼思想：

通過

WendaWebConfiguration注冊攔截器PassportInterceptor,攔截器在渲染頁面之前，會將user通過modelAndView保存，然后在header.html讀取user的值。所以，既然登錄成功，就應該

$user為真，因此，按理就不會出現測試結果。

解決方案：通過debug測試，找出在攔截器PassportInterceptor中，

logger.info("user:"+user.getName());
根本沒有輸出。因此，說明，整個項目根本沒有使用攔截器，也就是攔截器配置出現了問題。但是，攔截器配置代碼

WendaWebConfiguration中好像都OK，找不出哪里錯了。最后，仔細分析，是以為忘記寫組件@Component了。導致，無法啟動攔截器配置。
修改如下：

@Component
public class WendaWebConfiguration extends WebMvcConfigurerAdapter {

    @Autowired
    PassportInterceptor passportInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(passportInterceptor);
        super.addInterceptors(registry);
    }
}
再次測試，結果為：