Hi,

I'm trying to integrate Spring (3.0.2) with Struts (1.3.8).

At first, I build my project using Struts only and its working.

Then I tried to integrate it into Spring:

web.xml
Code:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.0" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
    <!--<filter>
        <filter-name>springSecurityFilterChain</filter-name>
        <filter-class>org.springframework.web.filter.DelegatingFilterProxy</filter-class>
    </filter>
    <filter-mapping>
        <filter-name>springSecurityFilterChain</filter-name>
        <url-pattern>/*</url-pattern>        
    </filter-mapping>-->    
    <context-param>
        <param-name>contextConfigLocation</param-name>
        <param-value>
                /WEB-INF/applicationContext.xml       
        </param-value>
    </context-param>
    <listener>
        <listener-class>
            org.springframework.web.context.ContextLoaderListener
        </listener-class>
    </listener>
    <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>detail</param-name>
            <param-value>2</param-value>
        </init-param>
        <load-on-startup>2</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>action</servlet-name>
        <url-pattern>*.do</url-pattern>
    </servlet-mapping>
    <session-config>
        <session-timeout>
            30
        </session-timeout>
    </session-config>
    <welcome-file-list>
        <welcome-file>index.jsp</welcome-file>
    </welcome-file-list>
</web-app>
At my struts-config.xml:
Code:
...
<action-mappings>
        <action path="/Welcome" forward="/WEB-INF/jsp/login.jsp"/>
        <action path="/login" 
                type="org.springframework.web.struts.DelegatingActionProxy"
                name="LoginForm" 
                validate="true"
                scope="request"
                parameter="method"
                input="/WEB-INF/jsp/login.jsp"
                >
                <forward name="successLogin" path="/welcomeStruts.jsp"/>
        </action>
    </action-mappings>
...
And at my applicationContext.xml:
Code:
...
<bean name="/login" class="com.myapp.login.LoginAction"/>
...
LoginAction class is extending LookupDispatchAction class.

I am always getting this error when i call /login.do
Code:
javax.servlet.ServletException: java.lang.NullPointerException
	org.apache.struts.action.RequestProcessor.processException(RequestProcessor.java:520)
	org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:427)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)

root cause

java.lang.NullPointerException
	org.apache.struts.action.Action.getResources(Action.java:339)
	org.apache.struts.actions.LookupDispatchAction.initLookupMap(LookupDispatchAction.java:171)
	org.apache.struts.actions.LookupDispatchAction.getLookupMapName(LookupDispatchAction.java:220)
	org.apache.struts.actions.LookupDispatchAction.getMethodName(LookupDispatchAction.java:272)
	org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:157)
	org.apache.struts.actions.LookupDispatchAction.execute(LookupDispatchAction.java:146)
	org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:113)
	org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
	org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
	org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:641)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:722)
	org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)