Java Struts错误：找不到Struts dispatcher

这是什么原因造成的，我如何修复它？

堆栈跟踪似乎证实了异常消息的解释：您可能试图呈现login.jsp页面，而此jsp使用了一些struts标记。但是由于请求没有通过Struts过滤器，因此标记无法工作

在Struts（以及其他所有基于动作的框架AFAIK）中，每个URL（图像、脚本等静态资源除外）都应该指向cebtral servlet或过滤器，它将发送到动作，而动作本身将转发到JSP。如果直接调用JSP，它就不再是MVC了，标记也不能工作

The Struts dispatcher cannot be found.  This is usually caused by using Struts tags without the associated filter. Struts tags are only usable when the request has passed through its servlet filter, which initializes the Struts dispatcher needed for this tag. - [unknown location]
        at org.apache.struts2.views.jsp.TagUtils.getStack(TagUtils.java:60)
        at org.apache.struts2.views.jsp.StrutsBodyTagSupport.getStack(StrutsBodyTagSupport.java:44)
        at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:48)
        at jsp_servlet.__login._jsp__tag0(__login.java:115)
        at jsp_servlet.__login._jspService(__login.java:84)
        at weblogic.servlet.jsp.JspBase.service(JspBase.java:34)
        at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
        at weblogic.servlet.internal.StubSecurityHelper.invokeServlet(StubSecurityHelper.java:125)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:292)
        at weblogic.servlet.internal.ServletStubImpl.onAddToMapException(ServletStubImpl.java:408)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:318)
        at weblogic.servlet.internal.ServletStubImpl.execute(ServletStubImpl.java:175)
        at weblogic.servlet.internal.WebAppServletContext$ServletInvocationAction.run(WebAppServletContext.java:3495)
        at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
        at weblogic.security.service.SecurityManager.runAs(Unknown Source)
        at weblogic.servlet.internal.WebAppServletContext.securedExecute(WebAppServletContext.java:2180)
        at weblogic.servlet.internal.WebAppServletContext.execute(WebAppServletContext.java:2086)
        at weblogic.servlet.internal.ServletRequestImpl.run(ServletRequestImpl.java:1406)
        at weblogic.work.ExecuteThread.execute(ExecuteThread.java:201)
        at weblogic.work.ExecuteThread.run(ExecuteThread.java:173)