struts2页面使用fck编辑器，出现Servlet.service() for servlet jsp threw exception异常

jsp引用了struts2的标签

项目使用struts2框架

现在一个jsp页面需要使用fck编辑器，jsp使用代码如下：

<td colspan="2">
       <input type="hidden" name="content" id="content" value="">
    <!-- 必须与 editor.html?id=diary_content id所对应的隐藏域-->
    <iframe id="editor" src="${pageContext.request.contextPath}/editor/editor.html?id=content" frameborder="0" scrolling="no" width="600" height="320"></iframe>
    <br><br>
    <s:hidden name="diary_type" value="%{#request.diary_type}"></s:hidden>
    <input type="button" value="保存" onclick="save();" />
    <input type="button" onclick="clearContent();" value="清空">
</td>

现在页面可以正常打开，功能好像也都没问题，但控制有异常。。。。。

将红色FCK的那句去掉就没用异常了。。

org.apache.catalina.core.ApplicationDispatcher invoke

严重: Servlet.service() for servlet jsp threw exception
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:52)
 at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:49)
 at org.apache.jsp.err404_jsp._jspx_meth_s_005fproperty_005f0(err404_jsp.java:159)
 at org.apache.jsp.err404_jsp._jspService(err404_jsp.java:90)
 at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
 at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
 at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
 at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:438)
 at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
 at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
 at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:424)
 at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:343)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:144)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
 at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:857)
 at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:565)
 at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1509)
 at java.lang.Thread.run(Thread.java:619)
2010-1-19 14:13:39 org.apache.catalina.core.StandardHostValve custom
严重: Exception Processing ErrorPage[errorCode=404, location=/err404.jsp]
org.apache.jasper.JasperException: 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.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:522)
 at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:416)
 at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:342)
 at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:267)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
 at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:630)
 at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:438)
 at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:374)
 at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:302)
 at org.apache.catalina.core.StandardHostValve.custom(StandardHostValve.java:424)
 at org.apache.catalina.core.StandardHostValve.status(StandardHostValve.java:343)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:144)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
 at org.apache.coyote.http11.Http11AprProcessor.process(Http11AprProcessor.java:857)
 at org.apache.coyote.http11.Http11AprProtocol$Http11ConnectionHandler.process(Http11AprProtocol.java:565)
 at org.apache.tomcat.util.net.AprEndpoint$Worker.run(AprEndpoint.java:1509)
 at java.lang.Thread.run(Thread.java:619)
Caused by: 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:52)
 at org.apache.struts2.views.jsp.ComponentTagSupport.doStartTag(ComponentTagSupport.java:49)
 at org.apache.jsp.err404_jsp._jspx_meth_s_005fproperty_005f0(err404_jsp.java:159)
 at org.apache.jsp.err404_jsp._jspService(err404_jsp.java:90)
 at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
 at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
 ... 19 more