NullPointerException

Greenhorn

Posts: 18

posted 17 years ago

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struts-cofig.xml
---------------------------------
<?xml version="1.0" encoding="ISO-8859-1" ?>
 
<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.2//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_2.dtd">
<struts-config>
<form-beans>
<form-bean name = "LoginForm" type = "com.example.LoginForm" />
<form-bean name = "UserDetailsForm" type = "com.example.UserDetailsForm" />
</form-beans>
<global-forwards>
<forward name = "UserDet" path="UserDetails.jsp"></forward>
</global-forwards>
<action-mappings>
<action
path = "/confirm"
type = "com.example.UserDetailsAction"
name = "UserDetailsForm"
>
<forward name = "success" path = "/Success.jsp" />
</action>
 
</action-mappings>
 
<message-resources parameter="com.example.messageProperties" />
</struts-config>
--------------------------------------------------
UserDetails.jsp
--------------------------------------------------
<%@ taglib uri = "/WEB-INF/struts-html" prefix = "html" %>
<%@ taglib uri = "/WEB-INF/struts-bean" prefix = "bean" %>
 
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html:html>
<head>
<title>User Details</title>
</head>
<body>
<html:form action="confirm">
First Name:<html:text property = "fname" value = "asdf" /><br>
Middle Name:<html:text property = "mname" value = "asdf" /><br>
Last Name:<html:text property = "lname" value = "asdf" />
 
</html:form>
</body>
</html:html>
--------------------------------------------
UserDetailsForm.java
---------------------------------------------
package com.example;
 
import javax.servlet.http.HttpServletRequest;
 
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
 
public class UserDetailsForm extends ActionForm 
{
String fname=null;
String mname=null;
String lname=null;
public String getFname() {
return fname;
}
public void setFname(String fname) {
this.fname = fname;
}
public String getLname() {
return lname;
}
public void setLname(String lname) {
this.lname = lname;
}
public String getMname() {
return mname;
}
public void setMname(String mname) {
this.mname = mname;
}
}
--------------------------------------------
UserDetailsAction.java
--------------------------------------------
package com.example;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
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 javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
public class UserDetailsAction extends Action 
{
public ActionForward execute(ActionMapping mapping, ActionForm fm, HttpServletRequest request, HttpServletResponse response)
{
System.out.println("Inside Actrion");
String target = "success";
return mapping.findForward(target);
}
}
*****************************************************
The error that is getting generated
******************************************************
java.lang.NullPointerException
at org.apache.struts.config.FormBeanConfig.createActionForm(FormBeanConfig.java:212)
at org.apache.struts.util.RequestUtils.createActionForm(RequestUtils.java:292)
at org.apache.struts.util.RequestUtils.createActionForm(RequestUtils.java:191)
at org.apache.struts.taglib.html.FormTag.initFormBean(FormTag.java:477)
at org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:457)
at org.apache.jsp.UserDetails_jsp._jspx_meth_html_form_0(UserDetails_jsp.java:122)
at org.apache.jsp.UserDetails_jsp._jspx_meth_html_html_0(UserDetails_jsp.java:98)
at org.apache.jsp.UserDetails_jsp._jspService(UserDetails_jsp.java:68)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:324)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:252)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:173)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardContextValve.invokeInternal(StandardContextValve.java:198)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:152)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:137)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:118)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:102)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.core.StandardValveContext.invokeNext(StandardValveContext.java:104)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:520)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:929)
at org.apache.coyote.tomcat5.CoyoteAdapter.service(CoyoteAdapter.java:160)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:799)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.processConnection(Http11Protocol.java:705)
at org.apache.tomcat.util.net.TcpWorkerThread.runIt(PoolTcpEndpoint.java:577)
at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:684)
at java.lang.Thread.run(Thread.java:534)
--------------------------------------------
Thanks in advance

Merrill Higginson

Ranch Hand

Posts: 4864

posted 17 years ago