拦截器

.xml:
 <mvc:interceptors>
<!--        <bean class="tests"></bean>-->
<!--        <ref bean="test"></ref>-->
        <mvc:interceptor>
<!--            扫描，一层目录是/*,所有目录是/**-->
            <mvc:mapping path="/**"/>
<!--            排除扫描-->
            <mvc:exclude-mapping path="/abc/"/>
            <bean class="tests"></bean>
        </mvc:interceptor>
    </mvc:interceptors>

import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

@Component
public class tests implements HandlerInterceptor {
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        return false;
    }

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

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