U can use
First method:
<html:messages id="message">
<bean:write name="message"/>
</html:messages>
Or, you can place specific messages at different locations
<html:messages id="message" property="<%=
org.apache.struts.action.ActionMessages.GLOBAL_MESSAGE %>">
<bean:write name="message"/>
</html:messages>
<table>
<tr>
<td align="left">
<html:text property="username" size="16" maxlength="16"/>
</td>
</tr>
<tr>
<td align="left">
<html:text property="activationDate" size="10" maxlength="10"/>
<br>
<html:messages id="message" property="activationDate">
<bean:write name="message"/><br>
</html:messages>
</td>
</tr>
</table>