springMVC中多个拦截器Interceptor的执行顺序

最新推荐文章于 2025-11-10 01:42:44 发布

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本文介绍SpringMVC框架中拦截器的具体实现方式及其在请求处理过程中的执行顺序。通过两个示例性的拦截器，展示了如何通过实现HandlerInterceptor接口来定制预处理、后处理及完成处理的方法，并说明了它们的调用顺序。

1.springMVC中拦截器实现这个接口implements HandlerInterceptor第一个拦截器：

public class MyInterceptor1 implements HandlerInterceptor{



public void afterCompletion(HttpServletRequest arg0,

   HttpServletResponse arg1, Object arg2, Exception arg3)

   throws Exception {

  System.out.println("=======> my interceptor1 :afterCompletion() ");

}



public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,

   Object arg2, ModelAndView arg3) throws Exception {

  // TODO Auto-generated method stub

  System.out.println("=======> my interceptor1:postHandle() ");

}



public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,

   Object arg2) throws Exception {

  System.out.println("=======> my interceptor1:preHandle() ");

  return true;

}



}
第二个拦截器：

public class MyInterceptor2 implements HandlerInterceptor{



    public void afterCompletion(HttpServletRequest arg0,

            HttpServletResponse arg1, Object arg2, Exception arg3)

            throws Exception {

        System.out.println("=======> my interceptor2:afterCompletion() ");

    }



    public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1,

            Object arg2, ModelAndView arg3) throws Exception {

        // TODO Auto-generated method stub

        System.out.println("=======> my interceptor2:postHandle() ");

    }



    public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1,

            Object arg2) throws Exception {

        System.out.println("=======> my interceptor2:preHandle()");

        return true;

    }

}
2.在springmvc的配置文件中

<mvc:interceptors>

            <mvc:interceptor>

                <mvc:mapping path="/**"/>

                <bean class="com.lifeng.interceptor.MyInterceptor1" />

            </mvc:interceptor>



            <mvc:interceptor>

                <mvc:mapping path="/**"/>

                <bean class="com.lifeng.interceptor.MyInterceptor2" />

            </mvc:interceptor>



                    </mvc:interceptors>

3.执行顺序：

=======> my interceptor1:preHandle()
=======> my interceptor2:preHandle()
.......
=======> my interceptor2:postHandle()
=======> my interceptor1:postHandle()
=======> my interceptor2:afterCompletion()
=======> my interceptor1 :afterCompletion()

另一例

interceptor1

interceptor2 如果都拦截 action

interceptor实际上也是一种filter的实现。不同的是，interceptor在执行action前后都会进行调用，可以针对某个指定的action那个拦截。filter会根据url进行过滤。
interceptor执行顺序会是:
 interceptor1 ---->interceptor2--->action--->interceptor2--->interceptor1