how to connect to the database using hibernate

hi,
i am a beginner.i have a code with me.now i need to connect this code to the database through hibernate.as far as i know in hibernate we need to create a .cfg file, .xml file, pojo class and one main class.In vaadin do i need to create any such files?can anyone help me out.i need to do this today itself.

meghana vemuri: hi,
i know in hibernate we need to create a .cfg file, .xml file, pojo class and one main class.

If you are using Netbeans, then there is a plugin that will create you the necessary files. Coming vaadin application creates the Application with Table and as a data source use HbnContainer. Detail info http://vaadin.com/wiki/-/wiki/Main/Using%20Hibernate%20with%20Vaadin

i have written the code to connect to the database using hibernate.but i got this error.not able to understand the problem.plz help.

HTTP Status 500 -

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: java.lang.NoClassDefFoundError: org/hibernate/Session
com.vaadin.terminal.gwt.server.AbstractApplicationServlet.handleServiceException(AbstractApplicationServlet.java:738)
com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:419)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

java.lang.NoClassDefFoundError: org/hibernate/Session
com.zoraly.agridoc.AgridocApplication.<init>(AgridocApplication.java:94)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
java.lang.reflect.Constructor.newInstance(Unknown Source)
java.lang.Class.newInstance0(Unknown Source)
java.lang.Class.newInstance(Unknown Source)
com.vaadin.terminal.gwt.server.ApplicationServlet.getNewApplication(ApplicationServlet.java:82)
com.vaadin.terminal.gwt.server.AbstractApplicationServlet.createApplication(AbstractApplicationServlet.java:706)
com.vaadin.terminal.gwt.server.AbstractApplicationServlet.findApplicationInstance(AbstractApplicationServlet.java:567)
com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:336)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

root cause

java.lang.ClassNotFoundException: org.hibernate.Session
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1387)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1233)
java.lang.ClassLoader.loadClassInternal(Unknown Source)
com.zoraly.agridoc.AgridocApplication.<init>(AgridocApplication.java:94)
sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
java.lang.reflect.Constructor.newInstance(Unknown Source)
java.lang.Class.newInstance0(Unknown Source)
java.lang.Class.newInstance(Unknown Source)
com.vaadin.terminal.gwt.server.ApplicationServlet.getNewApplication(ApplicationServlet.java:82)
com.vaadin.terminal.gwt.server.AbstractApplicationServlet.createApplication(AbstractApplicationServlet.java:706)
com.vaadin.terminal.gwt.server.AbstractApplicationServlet.findApplicationInstance(AbstractApplicationServlet.java:567)
com.vaadin.terminal.gwt.server.AbstractApplicationServlet.service(AbstractApplicationServlet.java:336)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)

note The full stack trace of the root cause is available in the Apache Tomcat/6.0.20 logs.
Apache Tomcat/6.0.20

meghana vemuri: i have written the code to connect to the database using hibernate.but i got this error.not able to understand the problem.plz help.

java.lang.ClassNotFoundException: org.hibernate.Session

It seems that there is no hibernate library in your CLASSPATH

In order to run hibernate you need to install several libraries; those for hibernate itself, and the libraries that hibernate requires. A bit of Googling gave me the following list: http://www.benmccann.com/dev-blog/minimum-libraries-required-for-hibernate/.

You will normally find these jars in the Hibernate binary distribution, and you need to copy them in your WEB-INF/lib folder (WebContent/WEB-INF/lib if you are using a Vaadin Project under Eclipse).

k.thank you.i got it.