cannot find message resources under key org.apache.struts.action.message 问题解决

在学习logic标签的iterate时，老是报cannot find message resources under key org.apache.struts.action.message 的错：

源代码如下：

<%
 HashMap hp = new HashMap();
 String veg[] = {"tomato","pepper"};
 String fruit[] = {"banana","apple","pair","orange"};
 String flowers[] = {"chrysanthemum","rose"};
 String trees[] = {"willow"} ;
 
 hp.put("vegetable", veg);
 hp.put("fruit", fruit);
 hp.put("flowers", flowers);
 hp.put("trees", trees);
 
 request.setAttribute("hasmap",hp);
%>
<logic:iterate id="element1" name="hasmap" indexId="ind1" >
    <bean:write name="ind1"/>...<bean:write name="element1" property="key"/><br>
    <logic:iterate name = "element1" property="value" id="element2">
       <bean:write name="element2"/><br>
    </logic:iterate>
</logic:iterate>

解决办法：

上面代码是正确的。只是web.xml的设置有问题，在使用struts的标签时，比如bean标签，有时会发生这个错误。

错误原因：
  web.xml中配置缺失：
    <init-param>
      <param-name>application</param-name>
      <param-value>ApplicationResources</param-value>
    </init-param>
造成原因：可能是JBuilder造成的，呵呵
解决方法：添加上，位置如下：
    <servlet>
    <servlet-name>action</servlet-name>
    <servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
    <init-param>
      <param-name>config</param-name>
      <param-value>/WEB-INF/struts-config.xml</param-value>
    </init-param>
    <init-param>
      <param-name>debug</param-name>
      <param-value>2</param-value>
    </init-param>
    <init-param>
      <param-name>application</param-name>
      <param-value>ApplicationResources</param-value>
    </init-param>
    <load-on-startup>2</load-on-startup>
  </servlet>