spring mvc 拦截器

    http://docs.spring.io/spring/docs/current/spring-framework-reference/htmlsingle/#mvc-handlermapping-interceptor

拦截器 不能改变参数值，适合权限验证等 校验的时候。跟过滤器差不多，只是范围和时机不同

今天遇到的需求是要查看请求中是否有分页参数，如果有就不处理，如果没有就注入默认值。发现拦截器不合适就改用了aop；   

 必须实现接口HandlerInterceptor 或者继承适配器HandlerInterceptorAdapter 

拦截所有的请求

  <beans>
   <bean id="handlerMapping" class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping">
    <property name="interceptors">
     <list>
      <ref bean="officeHoursInterceptor" />
     </list>
    </property>
   </bean>
   <bean id="officeHoursInterceptor" class="samples.TimeBasedAccessInterceptor">
    <property name="openingTime" value="9" />
    <property name="closingTime" value="18" />
   </bean>
  </beans>

拦截有限的请求

  <mvc:interceptors>
   <bean class="org.springframework.web.servlet.i18n.LocaleChangeInterceptor" />
   <mvc:interceptor>
    <mvc:mapping path="/**" />
    <mvc:exclude-mapping path="/admin/**" />
    <bean class="org.springframework.web.servlet.theme.ThemeChangeInterceptor" />
   </mvc:interceptor>
   <mvc:interceptor>
    <mvc:mapping path="/secure/*" />
    <bean class="org.example.SecurityInterceptor" />
   </mvc:interceptor>
  </mvc:interceptors>

来源： <http://docs.spring.io/spring/docs/current/spring-framework-reference/htmlsingle/#mvc-config-enable>

 

来自为知笔记(Wiz)