ActionMessage in struts

Question

hi
ActionError was deprecated in struts 1.2.so instead of "ActionError" we are using " ActionMessage". my doubts are
1.What actually "ActionMesages" class will do .is it's functioning is similar to
"ActionErrors" class. anyway "ActionErrors" was not deprecated.so what is
the need of "ActionMessages" class.
2.to display "ActionErrors" in our jsp we use <html:errors/>.can we use this for "ActionMessages" errors or we have to use "<html:messagesPresent>".
please clear me usage and concepts of "ActionMessage" ,"ActionMessages".

Answer 1

thnks for your reply .I tried an example by using both "ActionMessages" and "ActionMessage".but the problem is "eventhough there is an error it's not displaying that error.if i used "ActionErrors" iam able to see that error.I am mentioning hte code .plz tell me where the mistake is ..
Jsp file:---------------------
<%@ page language="java" contentType="text/html;charset=UTF-8"%>
<%@ taglib uri="netui-tags-databinding.tld" prefix="netui-data"%>
<%@ taglib uri="netui-tags-html.tld" prefix="netui"%>
<%@ taglib uri="netui-tags-template.tld" prefix="netui-template"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic"%>
<!--
<html:errors />
-->
<logic:messagesPresent>
<html:messages id="msg" locale="fr">
<b><bean:write name="msg" /></b><br><br><hr>
</html:messages>
</logic:messagesPresent>
<html:form action="/myservice2">
<bean:message key="app.user" />:::
<html:text property="user"/>
<br>
<bean:message key="app.name" />:::
<html:text property="name"/>
<html:submit value="submit"/>
</html:form>
Action class--------------------
package com.action;
import com.form.Lookform;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.Globals;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.action.ActionMessage;
import org.apache.struts.action.ActionMessages;
public class actionmess extends Action
public ActionForward execute(ActionMapping mapping,ActionForm form,
HttpServletRequest req,HttpServletResponse res)
{String target;
Lookform f=(Lookform) form;
String user=f.getUser();
if(user.endsWith("88"))
target="failure";
ActionMessages errors=new ActionMessages();
errors.add("myerror",new ActionMessage("myerror.errors"));
saveMessages(req,errors);
else
target="success";
return mapping.findForward(target);
validate() method in Action form returns only ActionErrors.that's why i mention "ActionMessages" in "execute()" method of Action class.
I tried both <html:errors/> ,<html:messages> but i am unable to see errors.