what caused this error,I have rewrote my struts-config.xml.
org.apache.jasper.JasperException: java.lang.NullPointerException: Module 'null' not found. My struts-config.xml <?xml version="1.0" encoding="ISO-8859-1" ?>
<struts-config>
<form-beans>
<form-bean name="messageFormBean"
type="test.MessageFormBean"/>
</form-bean>
<action
path="/messageLogin"
type="test.MessageActionClass"
name="messageFormBean"
scope="request"
<forward name="path"
path="/WEB-INF/view/messageSuccess.jsp"/>
</action>
<message-resources parameter="MessageResources" />
<message-resources parameter="TestMessageResources"
null="false" />
</struts-config>
My JSP <%@ taglib uri="http://struts.apache.org/tags-bean"
prefix="bean" %>
<%@ taglib uri="http://struts.apache.org/tags-html"
prefix="html" %>
<html>
<head>
<Title> Login </title>
</head>
<body>
<Center>
<html:form action="/messageLogin">
<bean:message key="form.firstName" /> :
<html:text property="firstName"/><br>
<bean:message key="form.lastName" /> :
<html:text property="lastName"/><br>
<bean:message key="form.emailID" /> :
<html:text property="emailID"/><br>
<html:submit>
Submit
</html:submit>
</html:form>
</center>
</body>
</html>