springboot攔截器@resource註解注入爲null解決方案

爲什麼@resource注入爲null

inteceptor在springcontext之前加載,注入必然是null

解決方案

加入註解@Bean

@Configuration
public class WebMVCInterceptor implements WebMvcConfigurer {

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(globalInterceptor())
                .addPathPatterns("/**")
                .excludePathPatterns("/userInfo/jwtUser") //登錄頁
                .excludePathPatterns("/register") //用戶註冊
                .excludePathPatterns("/login"); //用戶登錄
    }

    /**
     * @return globalInterceptor
     */
    @Bean
    public GlobalInterceptor globalInterceptor() {
        return  new GlobalInterceptor();
    }
}

@Component
public class GlobalInterceptor extends HandlerInterceptorAdapter {
    private static Logger logger = LoggerFactory.getLogger(GlobalInterceptor.class);
    @Resource
    private UserRoleService userRoleService;

    /**
     * 調用action之前進行攔截
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        return super.preHandle(request, response, handler);
    }

    /**
     * 從 cookie 中獲取 token
     */
    private String getTokenFromCookie(HttpServletRequest request) {
        Cookie[] cookies = Optional.ofNullable(request.getCookies()).orElse(new Cookie[0]); // Optional 強制賦默認值,cookies一定不爲 null
        String cookie = Arrays.stream(cookies).filter(item ->
                "X-Auth-Token".equals(item.getName())
        ).findFirst().map(Cookie::getValue).orElse(null);
        return cookie;
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        super.afterCompletion(request, response, handler, ex);
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        super.postHandle(request, response, handler, modelAndView);
    }
}