Question

假设我们有两个拦截器“ LogInterceptor”和“ AuthInterceptor”。第一个拦截器记录传入的请求，第二个拦截器对它进行身份验证。目的：链接LogIntercptor和AuthInterceptor。首先，我希望调用logInterceptor，然后执行AuthInterceptor。注意：我知道“重定向”并返回false（请不要提出该错误）

---------------------Log Interceptor---------------------------------------







    //First Inteceptor

    @Component
    public class LogInterceptor extends HandlerInterceptorAdapter
    {
        private final Logger Logger = 
        LoggerFactory.getLogger(this.getClass());
        @Override
        public boolean preHandle(HttpServletRequest request, 
         HttpServletResponse response, Object handler) throws Exception {

            //take action base on incoming IP
            long startTime = System.currentTimeMillis();
            request.setAttribute("startTime",startTime); 
            if(request.getRemoteAddr().startsWith("192")) 
                 {
                response.sendRedirect("/auth-failed"); //redirect to default
                return false;
            }
            return  true;

        }

        @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
        {



        }
      }

//第二个拦截器“但是代码还不完整，我只是想知道如何实现。” AuthInterceptor类 {

Answer 1

您只需要在配置Interceptor时按所需顺序添加InterceptorRegistry：

@EnableWebMvc
@Configuration
public class WebConfig implements WebMvcConfigurer{

    @Autowired
    private LogInterceptor logInterceptor;

    @Autowired
    private AuthInterceptor authInterceptor;

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        registry.addInterceptor(logInterceptor);
        registry.addInterceptor(authInterceptor);
    }

}

如果有多个WebMvcConfigurer，则可以简单地使用@Order来控制WebMvcConfigurer的执行顺序（值越小优先级越高）：

@EnableWebMvc
@Configuration
@Order(1)
public class FooWebConfig implements WebMvcConfigurer{

}

@EnableWebMvc
@Configuration
@Order(2)
public class BarWebConfig implements WebMvcConfigurer{

}

我们在春季是否提供了拦截器链接的规定？

1 个答案: