springboot2.0拦截器配置

/**
 * 拦截器
 * @Author Administrator
 * @Date 2018-12-11.
 * @Email [email protected]
 */
@Component
public class UserInterceptor implements HandlerInterceptor{
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        System.out.println("拦截器");
        HttpSession session = request.getSession();
        User user = (User) session.getAttribute("USER_SESSION");
        if (user != null){
            return true;
        }else {
            throw new MyException(ResultEnum.USER_LOGIN_NOTLOGIN);
        }
    }
    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable ModelAndView modelAndView) throws Exception {
    }
    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, @Nullable Exception ex) throws Exception {
    }
}

/**
 * @Author Administrator
 * @Date 2018-12-11.
 * @Email [email protected]
 */
@Configuration
public class WebMvcConfg implements WebMvcConfigurer{
    @Autowired
    private UserInterceptor userInterceptor;
    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(userInterceptor)
                //添加拦截路径
                .addPathPatterns("/api/**")
                //放行路径
                .excludePathPatterns("/api/login");
    }
}