Using Multiple Properties Files in Struts Framework

Hi Everybody!
I just to know how to use a multiple message-resources files in a Struts Framework.
I've 2 properties file :
1. ApplicationResources_A.properties
2. ApplicationResources_B.propertiesI put the files under WEB-INF/classes dir.
My configuration in struts-config file something like below:

     <message-resources key="A" parameter="ApplicationResources_A" />
     <message-resources key="B" parameter="ApplicationResources_B" />

</struts-config>
if my JSP code is like below , this error is thrown:
org.apache.jasper.JasperException: Cannot find message resources under key A
<tr>
    <td width="17%">Language A</td>
    <td width="83%"><bean:message bundle="A" key="user.lang.desc"/></td>
</tr>
<tr>
    <td width="17%">Language B</td>
    <td width="83%"><bean:message bundle="B" key="user.lang.desc"/></td>
</tr>
but if I change the JSP code like below it work fine:
<tr>
    <td width="17%">Language A</td>
    <td width="83%"><bean:message key="user.lang.desc"/></td>
</tr>
<tr>
    <td width="17%">Language B</td>
    <td width="83%"><bean:message key="user.lang.desc"/></td>
</tr>
In this code , I dont know which resources file is used.
So how do I solve this problem. Thanks you.

I have defined the following:
struts-config.xml
<message-resources key="ldap" parameter="com/project/struts/ldap"/>
Action.java
In execute method:
MessageResources messageResources= MessageResources.getMessageResources("com/project/struts/ldap");
System.out.println("INITIAL_CONTEXT_FACTORY"+messageResources.getMessage("INITIAL_CONTEXT_FACTORY"));
and it is working, however I have to change "com/project/struts/ldap" value in Action.java file whenever there is any change in name or location of ldap.properties.
Can I access this properties in such way that I don't have to change parameter path manually in Action.java (modifying in struts-config.xml is okay)? like access through key="ldap" or something.
Thanks and regards,

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