Greetings.
I am trying to use DynaActionForm with standard java bean and getting
error while submitting the request. The error is
javax.servlet.ServletException: BeanUtils.populate()
....
root cause
java.lang.IllegalArgumentException: No bean specified
...
The details are.
struts-config.xml
...
<form-beans>
<form-bean
name="Sample3Form"
dynamic="true"
type="org.apache.struts.action.DynaActionForm">
<form-property name="ContactDTO"
type="com.JFSample.model.vo.Sample3"/>
</form-bean>
</form-beans>
...
<form-beans>
<action-mappings>
<action path="/editSample3"
type="com.JFSample.struts.Sample3Action"
name="Sample3Form"
scope="request">
<forward name="success" path="/Sample3Detail.jsp" />
<forward name="failure" path="/Sample3Detail.jsp" />
</action>
<action-mappings>
The standard java bean class (ValueObject/DTO)
package com.JFSample.model.vo;
public class Sample3
{
public Sample3 () { }
public Integer getContactID() { return contactID; }
public void setContactID ( Integer _value) { contactID =
_value; }
public String getFirstName() { return firstName; }
public void setFirstName ( String _value) { firstName = _value; }
public String getLastName() { return lastName; }
public void setLastName ( String _value) { lastName = _value; }
public String getEmailAddress() { return emailAddress; }
public void setEmailAddress ( String _value) { emailAddress =
_value; }
private Integer contactID = 0;
private String firstName = " ";
private String lastName = " ";
private String emailAddress = " ";
}
Action form (Sample3Action)
package com.JFSample.struts;
import java.io.IOException;
import java.util.Hashtable;
import java.util.Locale;
import java.sql.Timestamp;
import java.util.*;
import javax.servlet.RequestDispatcher;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.*;
import org.apache.commons.beanutils.*;
import org.apache.struts.util.MessageResources;
import com.JFSample.model.vo.Sample3;
public final class Sample3Action extends Action {
static final String SUCCESS_MAPPING = "success";
static final String FAILURE_MAPPING = "failure";
public Sample3Action() { super(); }
protected ActionForward newSample3(HttpServletRequest request,
ActionMapping mapping,
ActionErrors errors,
ActionForm form,
HttpSession session) {
System.out.println("Reached newSample3");
DynaActionForm formData = (DynaActionForm) form;
Sample3 valueObj = new Sample3();
valueObj.setContactID(new Integer(1));
valueObj.setFirstName("MyFirstName");
valueObj.setLastName("MyLastName");
valueObj.setEmailAddress("MyEmailAddress");
try {
PropertyUtils.setNestedProperty(formData, "ContactDTO",
valueObj);
} catch (Exception e) {.... }
return (mapping.findForward(SUCCESS_MAPPING));
}
public ActionForward execute(ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response)
throws IOException, ServletException {
HttpSession session = request.getSession();
ActionErrors errors = new ActionErrors();
Locale locale = (Locale)
session.getAttribute(Action.LOCALE_KEY);
MessageResources messages = getResources();
String action = request.getParameter("action");
if (action == null )
action = "new";
if (action.equals("new")) {
return newSample3( request, mapping, errors, form, session);
}
if (action.equals("update")) { return updateSample3( request,
mapping, errors, form, session); }
return (mapping.findForward(FAILURE_MAPPING));
}
protected ActionForward updateSample3(HttpServletRequest request,
ActionMapping mapping,
ActionErrors errors,
ActionForm form,
HttpSession session) {
DynaActionForm formData = (DynaActionForm) form;
Sample3 valueObj = null;
try {
valueObj = (Sample3)
PropertyUtils.getNestedProperty(formData, "ContactDTO");
} catch (Exception e) {System.out.println(e.getMessage()); }
Integer contactID = new Integer(0);
String firstName = "";
String lastName = "";
String emailAddress = "";
contactID = valueObj.getContactID();
firstName = valueObj.getFirstName();
lastName = valueObj.getLastName();
emailAddress = valueObj.getEmailAddress();
System.out.println("ContactID = " + contactID.toString());
System.out.println("FirstName = " + firstName);
System.out.println("LastName = " + lastName);
System.out.println("Email = " + emailAddress);
return (mapping.findForward(SUCCESS_MAPPING));
}
}
The JSP part (Sample3Detail.jsp)
<%@ page language="java" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-logic.tld" prefix="logic" %>
<html>
<link rel="StyleSheet" href="css/style.css" type="text/css">
<head><title>Edit Sample3</title><script language=Javascript
src="js/validations.js"></script>
<script language=Javascript>
function validate( vForm) {
vForm.submit();
}
</script>
</head><body class=bodyStyle>
<span class=errorMessageStyle>
<html:errors/></span>
<html:form action="/editSample3.do?action=update">
<TABLE cellpadding=0 cellspacing=0 class=tableBorderStyle>
<tr> <td class=formTitleStyle>Edit Sample1</td> </tr>
<tr><td> <TABLE class=tableStyle> <TR>
<td class=formLabelStyle>ContactID</td>
<td class=formInputStyle><html:text
styleClass="formInputStyle"
property="ContactDTO.contactID" size="30"/></td>
</tr>
<TR> <td class=formLabelStyle>FirstName</td>
<td class=formInputStyle><html:text
styleClass="formInputStyle"
property="ContactDTO.firstName" size="30"/></td>
</tr>
<TR>
<td class=formLabelStyle>LastName</td>
<td class=formInputStyle><html:text
styleClass="formInputStyle"
property="ContactDTO.lastName" size="30"/></td>
</tr>
<TR> <td class=formLabelStyle>EmailAddress</td>
<td class=formInputStyle><html:text styleClass="formInputStyle"
property="ContactDTO.emailAddress" size="30"/></td>
</tr>
<tr> <td colspan=2>
<html:button styleClass="formButtonStyle" property="ok"
onclick="validate(this.form)" value="Submit"/>
<html:reset styleClass="formButtonStyle"/>
</td>
</tr> </TABLE> </td></tr></TABLE></html:form></body></html>
Test sceneario...
from browser if we do
http://localhost:8080/.../editSample3.do?action=new it works
while submitting the request (
http://localhost:8080/.../editSample3.do?action=update ) we get the
above error.
The above error we get before even reaching the action class execute
method.
We did refer to the document from
http://www.apache.org/~jvanzyl/jakarta-commons/beanutils/apidocs/org/apa
che/commons/beanutils/package-summary.html#dynamic
Our understand is the existing javabean(DTO/ValueObjects) can be used
with DynaActionForm and we need not create DynaBean.
Could some one guide us please.
Thanks for your cooperation and help.
-guna
