Spring MVC 学习 之 - 拦截器

public class GlobalInterceptor  implements HandlerInterceptor {

    public boolean preHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler) throws Exception {

        System.out.println("GlobalInterceptor 开始调用");

        return true;
    }

    public void postHandle(HttpServletRequest request,
            HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {
        // TODO Auto-generated method stub
        System.out.println("GlobalInterceptor 调用中");

        modelAndView.addObject("msg", "GlobalInterceptor 传入");
    }

    public void afterCompletion(HttpServletRequest request,
            HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        // TODO Auto-generated method stub
        System.out.println("GlobalInterceptor 调用完成");
    }

}

添加配置：

全局URL拦截：

<mvc:interceptors>
    <!-- 使用bean定义一个Interceptor，直接定义在mvc:interceptors根下面的Interceptor将拦截所有的请求 -->
  <bean class="com.rhythmk.web1.filter.GlobalInterceptor"  />
</mvc:interceptors> 

指定规格URL拦截：

<mvc:interceptors>
    <!-- 使用bean定义一个Interceptor，直接定义在mvc:interceptors根下面的Interceptor将拦截所有的请求 -->  

  <mvc:interceptor>
        <mvc:mapping path="/uic/*"/>
       <!--  定义在mvc:interceptor下面的表示是对特定的请求才进行拦截的   -->
        <bean class="com.rhythmk.web1.filter.GlobalInterceptor"/>
    </mvc:interceptor>
</mvc:interceptors>