Exception creating bean of class

[Simionu Ursache]

Hi there !

I am getting this error when accesing pages/tiles/bodys/PersonalBody.jsp (see stuts-config.xml)

org.apache.jasper.JasperException: Exception creating bean of class databeans.Personal: {1}
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:512)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:377)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
 

root cause 
 
javax.servlet.ServletException: Exception creating bean of class databeans.Personal: {1}
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:848)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:781)
org.apache.jsp.pages.tiles.bodys.PersonalBody_jsp._jspService(PersonalBody_jsp.java:307)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
 

root cause 
 
javax.servlet.jsp.JspException: Exception creating bean of class databeans.Personal: {1}
org.apache.struts.taglib.html.FormTag.initFormBean(FormTag.java:563)
org.apache.struts.taglib.html.FormTag.doStartTag(FormTag.java:520)
org.apache.jsp.pages.tiles.bodys.PersonalBody_jsp._jspx_meth_html_form_1(PersonalBody_jsp.java:341)
org.apache.jsp.pages.tiles.bodys.PersonalBody_jsp._jspService(PersonalBody_jsp.java:295)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:97)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:334)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
 

I have the following configuration:

struts-config.xml:

<struts-config>
<!--========================beans for HTML form data=======================-->
<form-beans>
<form-bean name="loginBean" type="databeans.LoginExistingUserForm"/>
        <form-bean name="ss_PersSelected" type="databeans.CompartPersSelectedBean"/>
        <form-bean name="ss_DatePers" type="databeans.Personal"/>
        <form-bean name="ss_ModelDatePontaj" type="databeans.ModelJTableGeneralizat"/>
</form-beans>
....................
<action path="/selectAngajat" type="formactions.SelectAngajatAction" name="ss_PersSelected" input="/pages/tiles/bodys/PersonalBody.jsp" scope="session">
<forward name="succes" path="pages/DatePersonal.jsp" redirect="true"/>
</action>

class databeans.Personal:

package databeans;
 
import java.sql.Timestamp;
 
import java.util.ArrayList;
import java.util.Date;
 
public class Personal extends ObiectPersistent {
    protected java.math.BigDecimal marca = new java.math.BigDecimal(0);
    protected java.lang.String numepren = "Angajat Nou";

Is there a problem because my Personal class extentds ObiectPersonal class and it should extend ActionForm ?

[Christophe Verré]

Did you check PersonalBody_jsp.java, line 307 ? (it's the translated version of your jsp file).

[Bear Bibeault]

Please be sure to ask Struts question in the Struts forum. I have moved this post there for you.

[Milan Jagatiya]

well, your form bean must sub class of ActionForm.

[Simionu Ursache]

so if i extend the class to ActionForm how can i still use the relation to ObiectPersistent class ?

[Milan Jagatiya]

i am not getting your problem actually why you want to relate ObiectPersistent in actionForm bean. ....
use ActionForm only for communicate controller and view....
Please describe your problem....

[Merrill Higginson]

In Struts, it's generally a good idea to have two different objects -- one that is part of the Model, and may be persistent, such as your Personal bean. The other is the ActionForm. They may have the same property names, but the ActionForm properties will be Strings, while the model object properties may be numeric datatypes. The commons BeanUtils class that is included with Struts has a handy method copyProperties that will copy all properties of the same name from one bean to another.

A Struts ActionForm bean does not handle data types like BigDecimal. So, your Personal bean wouldn't work as an ActionForm anyway, even aside from the inheritance problem.

[Simionu Ursache]

Ok...so here is the scenario :

I have two tables that keeps info's about Departments(Compartimente) of a company and staff (Personal) of every department. The relation between these two is held by relational column compartid.

For every table i have created a control class (Personal.class , Compartimente.class) with setter and getter methods. This classes are extending the ObiectPersistent.class in which i do the insert, update, delete methods of the records.

Personal.class

package databeans;
 
import java.sql.Timestamp;
 
import java.util.ArrayList;
import java.util.Date;
 
public class Personal extends ObiectPersistent {
    protected java.math.BigDecimal marca = new java.math.BigDecimal(0);
    protected java.lang.String numepren = "New Employee";
    protected java.math.BigDecimal compartid;
 
 public java.math.BigDecimal getMarca() {
        return this.marca;
    }
 
    public java.lang.String getNumepren() {
        return this.numepren;
    }
 
    public java.math.BigDecimal getCompartid() {
        return this.compartid;
    }
 
  public void setMarca(java.math.BigDecimal valNoua) {
        if (valNoua == null ? marca != valNoua : !valNoua.equals(marca)) {
            this.marca = valNoua;
            this.setStare(ObiectPersistent.MODIFICAT);
        }
    }
 
    public void setNumepren(java.lang.String valNoua) {
        if (valNoua == null ? numepren != valNoua : 
            !valNoua.equals(numepren)) {
            this.numepren = valNoua;
            this.setStare(ObiectPersistent.MODIFICAT);
        }
    }
 
    public void setCompartid(java.math.BigDecimal valNoua) {
        if (valNoua == null ? compartid != valNoua : 
            !valNoua.equals(compartid)) {
            this.compartid = valNoua;
            this.setStare(ObiectPersistent.MODIFICAT);
        }
    }

Compartimente.class

package databeans;
 
import java.math.BigDecimal;
 
import java.util.ArrayList;
 
public class Compartimente extends ObiectPersistent {
    protected java.math.BigDecimal compartid;
    protected java.lang.String numecompart;
 
public java.math.BigDecimal getCompartid() {
        return this.compartid;
    }
 
    public java.lang.String getNumecompart() {
        return this.numecompart;
    }
 public void setCompartid(java.math.BigDecimal valNoua) {
        if (valNoua == null ? compartid != valNoua : 
            !valNoua.equals(compartid)) {
            this.compartid = valNoua;
            this.setStare(ObiectPersistent.MODIFICAT);
        }
    }
 
    public void setNumecompart(java.lang.String valNoua) {
        if (valNoua == null ? numecompart != valNoua : 
            !valNoua.equals(numecompart)) {
            this.numecompart = valNoua;
            this.setStare(ObiectPersistent.MODIFICAT);
        }
    }

I would like to see in a page all the staff from one department. so i have a first form with a select option that show all the departments and a refresh button. When i click the refresh button, the second form on the page load the info about the staff from the compartiment selected.

Here is the source:

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<%@ page contentType="text/html;charset=windows-1252"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-bean" prefix="bean"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-html" prefix="html"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-logic" prefix="logic"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-nested" prefix="nested"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-template"
           prefix="template"%>
<%@ taglib uri="http://jakarta.apache.org/struts/tags-tiles" prefix="tiles"%>
 
<%@ page import="databeans.*"%> 
<%@ page import="java.sql.Connection"%>
<jsp:useBean id="ss_PersSelected" class="databeans.CompartPersSelectedBean" scope="session"/> 
<html:form action="/selectAngajat.do">
<table width="600" border="1">
<tr>
<td width="174">Selectati un Compartiment:</td>
<td width="213">
<html:select property="codcompartiment">
<%
Connection conn=Utilitati.getConexiune();
java.util.ArrayList listaCompartimente=
    ObiectPersistent.getObjects(Compartimente.class,conn,null); 
conn.close();
for(int i=0;i<listaCompartimente.size();i++) { 
%>
<html :-o	 ption value="<%=((Compartimente)listaCompartimente.get(i)).getCompartid().toString()%>">
<%=((Compartimente)listaCompartimente.get(i)).getNumecompart()%> 
</html :-o	 ption>
<%}%> <%-- s-a inchis for-ul--%>
</html:select>
 
</td>
<td width="191">
<input type="submit" name="Submit" value="Reincarcare Angajati">
</td>
</tr> 
<tr>
<td width="174">Selectati Angajatul:</td> 
<td width="213">
<html:select property="marcaselectata">
<% Connection conn=Utilitati.getConexiune();
if (ss_PersSelected.getCodcompartiment() != null) //exista un compartiment selectat
{ java.util.ArrayList listaAngajati = 
    ObiectPersistent.getObjects(Personal.class,conn,
" where compartid="+ss_PersSelected.getCodcompartiment());
conn.close();
for(int i=0;i<listaAngajati.size();i++){%>
<html :-o	 ption value="<%=((Personal)listaAngajati.get(i)).getMarca().toString()%>">
<%=((Personal)listaAngajati.get(i)).getNumepren()%>
</html :-o	 ption>
<%}}%> <%-- inchidem FOR si IF --%>
</html:select>
</td>
<td width=" 191 ">
<input type="submit" name="Submit2" value="Refresh Date Personale">
</td> 
</tr> 
</table>
 
</html:form>
 
<%if (request.getSession().getAttribute("ss_DatePers") != null){%> 
<tiles:insert page="/DatePersonal.jsp"/> <%} 
    else if (ss_PersSelected.getCodcompartiment() != null){%> 
    <html:form action="/dateAngajat.do">
<html:hidden property="actiune" value="newObject"/> 
<html:submit property="add" value="Angajat Nou" /> 
</html:form>
<%}%>

I can see the list of compartiments, but when i click the refreh button i get the error.

Other files:
struts-config.xml

 
<form-beans>
        <form-bean name="ss_PersSelected" type="databeans.CompartPersSelectedBean"/>
        <form-bean name="ss_DatePers" type="databeans.Personal"/>
</form-beans>
 
<action path="/selectAngajat" type="formactions.SelectAngajatAction" name="ss_PersSelected" input="/pages/tiles/bodys/PersonalBody.jsp" scope="session">
<forward name="succes" path="pages/DatePersonal.jsp" redirect="true"/>
</action>

CompartPersSelectedBean.class

package databeans;
 
import java.math.BigDecimal;
 
import org.apache.struts.action.ActionForm;
 
public class CompartPersSelectedBean extends ActionForm {
 
    public CompartPersSelectedBean() {
    }
 
    private BigDecimal codcompartiment;
    private BigDecimal marcaselectata;
 
    public BigDecimal getCodcompartiment() {
        return this.codcompartiment;
    }
 
    public BigDecimal getMarcaselectata() {
        return this.marcaselectata;
    }
 
    public void setCodcompartiment(BigDecimal valNoua) {
        if (!valNoua.equals(this.codcompartiment) && 
            this.codcompartiment != null) {
            // daca a selectat alt compartiment 
            this.marcaselectata = new BigDecimal(-1);
        }
        this.codcompartiment = valNoua;
    }
 
    public void setMarcaselectata(BigDecimal valNoua) {
        if (this.marcaselectata != null && 
            this.marcaselectata.intValue() == -1)
            this.marcaselectata = null;
        else
            this.marcaselectata = valNoua;
    }
}

SelectAngajatAction.class

package formactions;
 
import databeans.CompartPersSelectedBean;
 
import databeans.ObiectPersistent;
import databeans.Personal;
import databeans.Utilitati;
 
import java.io.IOException;
 
import javax.servlet.ServletException;
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;
 
public class SelectAngajatAction extends Action {
 
    public ActionForward perform(ActionMapping mapping, ActionForm form, 
                                 HttpServletRequest request, 
                                 HttpServletResponse response) throws IOException, 
                                                                      ServletException {
        CompartPersSelectedBean formBean = (CompartPersSelectedBean)form;
        java.sql.Connection conn = null;
 
        if (formBean.getMarcaselectata() != null && 
            formBean.getMarcaselectata().intValue() != -1)
            try { // incarc in sesiune obiectul Personal corespunzator marcii selectate de utilizator 
                conn = Utilitati.getConexiune();
                Personal objPersCurent = 
                    (Personal)ObiectPersistent.getObjects(Personal.class, conn, 
                                                          "where marca=" + 
                                                          formBean.getMarcaselectata().toString()).get(0);
                // ATENTIE! Identificatorul atributului trebuie sl fie cel definit in Struts-Contig.xml 
                request.getSession().setAttribute("ss_DatePers", 
                                                  objPersCurent);
 

                conn.close();
 
            } catch (Exception e) {
                e.printStackTrace();
                if (conn != null)
                    try {
                        conn.close();
                    } catch (Exception err) {
                    err.printStackTrace();
                    }
                return mapping.findForward("eroareBD");
            }
        else // daca marca e null elimin eventualul atribut ss_DatePers anterior
            request.getSession().removeAttribute("ss_DatePers");
 
        return mapping.findForward("success");
    }
}

getObjects from ObiectPersistent.class

 public static ArrayList getObjects(Class objectClass, Connection conn, 
                                       String whereFiltru) throws Exception {
        boolean conexiuneNula = false;
        if (conn == null) {
            conn = Utilitati.getConexiune();
            conexiuneNula = true;
        }
        Statement stmt = conn.createStatement();
        ArrayList listaObiecteNoi = new ArrayList();
        try {
            String numeClasa = objectClass.getName();
            // iau numai numele clasei fara numele package-ului
            String numeTabela = 
                numeClasa.substring(numeClasa.lastIndexOf('.') + 1);
            String frazaSelect = 
                "select rowid," + numeTabela + ".* from " + numeTabela;
            if (whereFiltru != null)
                frazaSelect += " " + whereFiltru;
            ResultSet rs = stmt.executeQuery(frazaSelect);
            String numeAtributTabela;
            Field atributObiect;
            ArrayList atributePersistente = 
                getSetAtributePersistente(objectClass, false);
            Field atributIdLinieBD = objectClass.getField("idLinieBD");
            atributIdLinieBD.setAccessible(true);
 
            while (rs.next()) { // obtin un obiect nou
                Object obiectNou = objectClass.newInstance();
                // incarc datele de pe inregistrarea curenta in obiect
                for (int i = 0; i < atributePersistente.size(); i++) {
                    atributObiect = (Field)atributePersistente.get(i);
                    numeAtributTabela = atributObiect.getName();
                    Object valoareAtribut = rs.getObject(numeAtributTabela);
                    // setez atributul obiectului cu valoarea de mai sus
                    /**
                    System.out.print(numeAtributTabela);
                    System.out.print(" ");
                    System.out.flush();
                    System.out.print(valoareAtribut.getClass().getName());
                    System.out.print(" ");
                    System.out.println(valoareAtribut);
                    */
                    atributObiect.set(obiectNou, valoareAtribut);
                }
                // extrag si rowid-ul
                atributIdLinieBD.set(obiectNou, 
                                     ((oracle.jdbc.OracleResultSet)rs).getROWID("rowid"));
 
                ((ObiectPersistent)obiectNou).setStare(ObiectPersistent.SINCRONIZAT);
                listaObiecteNoi.add(obiectNou);
            }
            stmt.close();
            if (conexiuneNula) // daca nu am primit conexiunea o inchid
                conn.close();
        } catch (Exception e) {
            if (stmt != null)
                stmt.close();
            if (conexiuneNula)
                conn.close();
            throw e;
        } finally {
        }
        return listaObiecteNoi;
    }

[Merrill Higginson]

Since you're not using the Personal bean as the form bean for an Action class, it is completely unneccessary to define it as a form bean at all. Remove the line:

<form-bean name="ss_DatePers" type="databeans.Personal"/>

from your struts-config.xml file and it should work.

A couple of observations, though:

1. It is considered very bad form to include database access code in a JSP as you have done. Struts is a Model/View/Controller framework that helps you separate these three functions into separate componenents. By putting database access code in your JSP, you're mixing model logic into a view component.

2. If you read a bit about the <htmlptionsCollection> tag, you will see that it is much easier to use this tag than the method you're using. Here is the link to the documentation.
[ February 01, 2007: Message edited by: Merrill Higginson ]

[Milan Jagatiya]

if you are using struts...you should follow struts rules..you are breaking struts rules here...

[Simionu Ursache]

I have solved the problems but got into another one. Now when i submit the date i get a blank .do page

If i go back and the refresh(F5) the data that should be displayed is displayed!

And this happens at all pages. I have done a very simple login page that just outputs the entered data and everything is ok.

Do you have any ideas ?

[Simionu Ursache]

could it be a bug of Struts ?