Struts2 过滤器和拦截器执行的顺序

[nojave]

在web.xml ,定义首页位置:

	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>

并配置了一个filter,用于过滤对jsp的直接访问.

	<filter>
		<filter-name>indexfilter</filter-name>
		<filter-class>com.prodinfo.filter.IndexFilter</filter-class>
	</filter>
	<filter-mapping>
		<filter-name>indexfilter</filter-name>
		<url-pattern>/index.jsp</url-pattern>
	</filter-mapping>

......
public class IndexFilter implements Filter {
         ......
	public void doFilter(ServletRequest request, ServletResponse response,
			FilterChain chain) throws IOException, ServletException {

		HttpServletRequest re = (HttpServletRequest) request;
		HttpSession session = re.getSession();
		//redirect to action
		
		request.getRequestDispatcher("loadindex.action?id=xxx").forward(
				request, response);
		System.out.println("i am filter");
	}
         ......
}

struts.xml中配置了interceptor,拦截用户的请求,在action执行之前,load页面信息,然后继续.

		<interceptors>
			<interceptor name="LoadHeaderFooter"
				class="loadHeaderFooter">
			</interceptor>
			<interceptor-stack name="InterceptorStack">
				<interceptor-ref name="defaultStack" />			
				<interceptor-ref name="LoadHeaderFooter" />
			</interceptor-stack>
		</interceptors>
		<action name="loadindex" class="companyInfoAction"
			method="loadCompanyInfo">
			<result name="success">/index.jsp</result>
			<interceptor-ref name="LoadHeaderFooter"></interceptor-ref>
		</action>

......
public String intercept(ActionInvocation invocation) throws Exception {
		//System.out.println("Before Action");
		//get header & footer infomation
		List result = ci.getHeaderFooter("xxx");
		......
		System.out.println("i am interceptor");	

		final String res = invocation.invoke();
		//System.out.println("After Action");
		return res;
	}
......

我理解的执行顺序是(<welcome-file-list>)index.jsp->(filter)"loadindex.action?id=xxx"->(interceptor)"loadHeaderFooter"->(Action)"loadindex"->(jsp)index.jsp
可是现在执行的顺序是先interceptor再filter,程序运行打印结果是:
i am interceptor
loading company info of null
i am filter

去掉了interceptor,发现还是先执行的action再进的filter. Struts2的执行顺序一定是先action再filter? 已经把FilterDispatcher放到web.xml最上面了.

[woming66]

<filter>
<filter-name>indexfilter</filter-name>
<filter-class>com.prodinfo.filter.IndexFilter</filter-class>
</filter>
<filter-mapping>
<filter-name>indexfilter</filter-name>
<url-pattern>/index.jsp</url-pattern>
</filter-mapping>

你肯定配置在FilterDispatcher的下边了，如果你把indexfilter配置在FilterDispatcher上面，结果就不一样了

[CoLinM]

大体执行是这样的：
(filter in)->(interceptor in)->(Action)-> (interceptor out)->(jsp)index.jsp ->(filter out)

[javaors]

这个跟拦截器和过滤器放的前后顺序有关吗，貌似有可能

[jinancf]

顺序应该有关系的.

[chenxiaomingit]

你把<url-pattern>/index.jsp </url-pattern> 换成<url-pattern>/* </url-pattern>
看看顺序有没有变化哈

[nojave]

问题解决, struts2 的执行顺序是 <welcome-file-list> => filter => interceptor => action => jsp => filter

[nojave]

[Quote=引用 1 楼 woming66 的回复:]
<filter>
        <filter-name>indexfilter </filter-name>
        <filter-class>com.prodinfo.filter.IndexFilter </filter-class>
    </filter>
    <filter-mapping>
        <filter-name>indexfilter </filter-name>
        <url-pattern>/index.jsp </url-pattern>
    </filter-mapping>

你肯定配置在FilterDispatcher的下边了，如果你把indexfilter配置在FilterDispatcher上面，结果就不一样了
[/Quote]

谢谢回答, 这种方法试过了(其实一开始就是这样的,后来才改成FilterDispatcher在最上面), 可是顺序还是不对,先interceptor后filter. 一摸一样.