Forum:

Struts

logic:iterate problem

Greenhorn

Posts: 25

posted 6 years ago

i use struts1.3 hibernate4 in tomcat6 i want to list table list with hibernate
but when i run localhost:8080/strutsh i got

Etat HTTP 500 -

type Rapport d'exception

message

description Le serveur a rencontré une erreur interne () qui l'a empêché de satisfaire la requête.

exception

org.apache.jasper.JasperException: javax.servlet.ServletException: javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:502)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:412)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
cause mère

javax.servlet.ServletException: javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:865)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:794)
org.apache.jsp.index_jsp._jspService(index_jsp.java:142)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
cause mère

javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:864)
org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:236)
org.apache.jsp.index_jsp._jspService(index_jsp.java:92)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
note La trace complète de la cause mère de cette erreur est disponible dans les fichiers journaux de Apache Tomcat/6.0.35.

Apache Tomcat/6.0.35

index.jsp

HibAction.java

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletContext;

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 org.hibernate.SessionFactory;
import org.hibernate.Query;
import org.hibernate.Session;
import java.util.*;

public class HibAction extends Action {

public ActionForward execute(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,
		HttpServletResponse response) throws Exception{

HibForm formObj = (HibForm)form;

ServletContext context = request.getSession().getServletContext();

SessionFactory factory = (SessionFactory)
                context.getAttribute(HibernatePlugIn.SESSION_FACTORY_KEY);

Session session =factory.openSession();

try {
			test t = new test();
      			t.setId(formObj.getId());
			t.setT(formObj.getT());
       			t.setTt(formObj.getTt());

session.beginTransaction();
			session.save(t);
         		session.getTransaction().commit();

Query query=session.createQuery("SELECT t FROM test t");
                        ArrayList list=(ArrayList)query.list();
                        request.setAttribute("list",list);

} catch(Exception e) {
          		session.getTransaction().rollback();
		}

session.close();

return mapping.findForward("success");
	}

}

Joe Ess

Bartender

Posts: 9462

I like...

posted 6 years ago

You are probably getting an exception but you 'd never know because you aren't logging anything in your catch block. This is a Very Bad Idea.
Another best practice would be to set the list attribute outside the try block so even if you get an exception, your JSP will not break.

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oussama jlassi

Greenhorn

Posts: 25

posted 6 years ago

i removed ty catch but nothing is changing

Etat HTTP 500 -

type Rapport d'exception

message

description Le serveur a rencontré une erreur interne () qui l'a empêché de satisfaire la requête.

exception

org.apache.jasper.JasperException: javax.servlet.ServletException: javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:502)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:412)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
cause mère

javax.servlet.ServletException: javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:865)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:794)
org.apache.jsp.index_jsp._jspService(index_jsp.java:142)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
cause mère

javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:864)
org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:236)
org.apache.jsp.index_jsp._jspService(index_jsp.java:92)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
note La trace complète de la cause mère de cette erreur est disponible dans les fichiers journaux de Apache Tomcat/6.0.35.

Apache Tomcat/6.0.35

Joe Ess

Bartender

Posts: 9462

I like...

posted 6 years ago

I didn't tell you to remove the try-catch block. I told you to log the exception you are probably getting.

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oussama jlassi

Greenhorn

Posts: 25

posted 6 years ago

Joe Ess i added log to catch i dont know i did it right or not but in browser i get the same message

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletContext;

public class HibAction extends Action {

public ActionForward execute(
		ActionMapping mapping,
		ActionForm form,
		HttpServletRequest request,
		HttpServletResponse response) throws Exception{

HibForm formObj = (HibForm)form;

ServletContext context = request.getSession().getServletContext();

SessionFactory factory = (SessionFactory)
                context.getAttribute(HibernatePlugIn.SESSION_FACTORY_KEY);

Session session =factory.openSession();

Logger log = Logger.getLogger("");
try {  
			test t = new test();
      			t.setId(formObj.getId());
			t.setT(formObj.getT());
       			t.setTt(formObj.getTt());

session.beginTransaction();
			session.save(t);
         		session.getTransaction().commit();

Query query=session.createQuery("SELECT t FROM test t");
                        ArrayList list=(ArrayList)query.list();
                        request.setAttribute("list",list);
   
 } catch(Exception e) {  
                session.getTransaction().rollback();
log.log(Level.WARNING,e.getMessage());  
 }
		
		session.close();

return mapping.findForward("success");
	}

}

Joe Ess

Bartender

Posts: 9462

I like...

posted 6 years ago

I don't know how the Java Logging functionality is set up by default, so you should probably look at the documentation and see where your log message ends up. With Tomcat, you could probably just use e.printStackTrace() and see the exception (if it is indeed happening) in the server console.

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oussama jlassi

Greenhorn

Posts: 25

posted 6 years ago

tomcat log

mars 13, 2012 9:13:16 PM org.apache.catalina.core.StandardWrapperValve invoke
Grave: "Servlet.service()" pour la servlet jsp a généré une exception
javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
at org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:864)
at org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:236)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:107)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)

mars 13, 2012 9:13:25 PM org.apache.catalina.core.StandardWrapperValve invoke
Grave: "Servlet.service()" pour la servlet jsp a généré une exception
javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
at org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:864)
at org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:236)
at org.apache.jsp.index_jsp._jspService(index_jsp.java:107)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:602)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)

Jimmy Clark

Ranch Hand

Posts: 2187

posted 6 years ago

When your index.jsp file is being processed by the JSP Engine and then the Servlet Container, the bean does not exist at this time. Hence, it cannot be found when the container is generating the HTML data to send back to your browser. This is the source of your exception. There are a few other things that are not correct as well.

I suggest that you first learn a bit more about the execution path and timing in regards to when things happen. Also, for beginners it is better to keep (1) the JSP containing the button to execute the action that creates the bean and (2) the JSP that displays the data in the bean separate. Right now you are attempting to combine them and are not clearly able to determine where your errors and are located.

oussama jlassi

Greenhorn

Posts: 25

posted 6 years ago

i use the same java action and i put the part of the display in a new jsp file named list with the path hib1 when i run localost:8080/strutsh/hib1.do i get

Etat HTTP 500 -

type Rapport d'exception

message

description Le serveur a rencontré une erreur interne () qui l'a empêché de satisfaire la requête.

exception

javax.servlet.ServletException: org.hibernate.TransactionException: Transaction not successfully started
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:286)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
cause mère

org.hibernate.TransactionException: Transaction not successfully started
org.hibernate.engine.transaction.spi.AbstractTransactionImpl.rollback(AbstractTransactionImpl.java:200)
HibAction.execute(HibAction.java:53)
org.apache.struts.chain.commands.servlet.ExecuteAction.execute(ExecuteAction.java:58)
org.apache.struts.chain.commands.AbstractExecuteAction.execute(AbstractExecuteAction.java:67)
org.apache.struts.chain.commands.ActionCommandBase.execute(ActionCommandBase.java:51)
org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
org.apache.commons.chain.generic.LookupCommand.execute(LookupCommand.java:305)
org.apache.commons.chain.impl.ChainBase.execute(ChainBase.java:191)
org.apache.struts.chain.ComposableRequestProcessor.process(ComposableRequestProcessor.java:283)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:449)
javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
note La trace complète de la cause mère de cette erreur est disponible dans les fichiers journaux de Apache Tomcat/6.0.35.

Apache Tomcat/6.0.35

and in localhost:8080/strutsh/list.jsp

Etat HTTP 500 -

type Rapport d'exception

message

description Le serveur a rencontré une erreur interne () qui l'a empêché de satisfaire la requête.

exception

org.apache.jasper.JasperException: javax.servlet.ServletException: javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:502)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:412)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
cause mère

javax.servlet.ServletException: javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:865)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:794)
org.apache.jsp.list_jsp._jspService(list_jsp.java:141)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
cause mère

javax.servlet.jsp.JspException: Cannot find bean: "list" in any scope
org.apache.struts.taglib.TagUtils.lookup(TagUtils.java:864)
org.apache.struts.taglib.logic.IterateTag.doStartTag(IterateTag.java:236)
org.apache.jsp.list_jsp._jspService(list_jsp.java:92)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:388)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:313)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:260)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
note La trace complète de la cause mère de cette erreur est disponible dans les fichiers journaux de Apache Tomcat/6.0.35.

Apache Tomcat/6.0.35

Jimmy Clark

Ranch Hand

Posts: 2187

posted 6 years ago

I would first make sure that your Hibernate code is correct. This should be done from a simple command-line program with no interaction with a web server, JSP or servlet code.

Once you have properly functioning Hibernate code, put this to the side for a minute.

Second, you should make sure that you can use the Struts iterate element to properly display data from a collection of objects.

Once you have a good understanding of the iterate element and can use it without error, then you are ready to (1) integrate the Hibernate code to create a collection of objects and (2) use the iterate element to display data from these objects in a HTML page.

Right now you have many errors coming from different places and it is most likely interferring with your ability to learn.

Aside, Struts Action classes are a part of an application's Controller. It is a bad practice to code logic such as database access and/or data retrieval in Controller code. This type of code is part of an application's business object model and should be located in classes that do not have code-level dependencies on any particular presentation technology, e.g. Servlet Framework.

oussama jlassi

Greenhorn

Posts: 25

posted 6 years ago

my hibernate insert code is working fine when i remove the pat of listing data in both jsp and java file

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