springMVC拦截器的使用

public class MyInterceptor implements HandlerInterceptor {
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {

        System.out.println("================处理前=============");
        return false;
    }
    //拦截日志
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
        System.out.println("=================处理后==============");
    }
    //拦截日志
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
        System.out.println("=================清理==============");
    }
}

<mvc:interceptors>
        <mvc:interceptor>
            <!--过滤哪个请求-->
            <mvc:mapping path="/**"/>
            <!--由谁来过滤-->
            <bean class="com.meng.config.MyInterceptor"/>
        </mvc:interceptor>
    </mvc:interceptors>