Please help : Exception ClassNotFound

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exlipzSnx7

Post subject: Please help : Exception ClassNotFound

Posted: Sep 22, 2008 - 02:27 PM

Joined: Sep 17, 2008
Posts: 17

Hi, am using MyEclipse. The tutorial is on Hibernate & Spring ...

Code:

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
at org.springframework.beans.factory.support.AbstractBeanFactory.<init>(AbstractBeanFactory.java:94)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.<init>(AbstractAutowireCapableBeanFactory.java:109)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.<init>(AbstractAutowireCapableBeanFactory.java:118)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.<init>(DefaultListableBeanFactory.java:87)
at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:72)
at org.springframework.beans.factory.xml.XmlBeanFactory.<init>(XmlBeanFactory.java:61)
at com.myeclipse.hibernatespring.BusinessLogic.main(BusinessLogic.java:23)

I do have the commons-loggin.jar added to the Java Build Path ...

My class ...

Code:

package com.myeclipse.hibernatespring;

import org.springframework.beans.factory.BeanFactory;
import org.springframework.beans.factory.xml.XmlBeanFactory;
import org.springframework.core.io.ClassPathResource;

public class BusinessLogic
{
public static void main(String[] args)
{
   /* 1. Create new user */
   Integer id = new Integer(1);
   User user = new User();

   user.setUserId(id);
   user.setUsername("snx20");
   user.setPassword("102077");
   user.setFirstName("Sonx");
   user.setLastName("Nkukwi");
   user.setDateCreated(Integer.valueOf((int) System.currentTimeMillis()));

   /* 2. Load the Spring bean configuration and create a bean factory */
   BeanFactory beanFactory = new XmlBeanFactory(new ClassPathResource ("applicationContext.xml"));

   /* 3. Create instance of PersistanceLayer */
   PersistenceLayer persistenceLayer = (PersistenceLayer) beanFactory.getBean("persistenceLayer");

   /* 4. Save the new user to the database */
   persistenceLayer.addUser(user);

   /* 5. Confirm that your user was added */
   User userLoadedFromDB = persistenceLayer.findUserById(id);

   System.out.print("User Loaded from DB [username="
         + userLoadedFromDB.getUsername() + ", password="
         + userLoadedFromDB.getPassword() + ", firstName="
         + userLoadedFromDB.getFirstName() + ", lastName="
         + userLoadedFromDB.getLastName() + "]");

   /* 6. Update the user */
   userLoadedFromDB.setFirstName("Lungile");
   persistenceLayer.updateUser(userLoadedFromDB);

   /* Confirm that the update worked */
   User userLoadedFromDBAgain = persistenceLayer.findUserById(id);
   System.out.print("User Loaded from DB Again [fistName="
         + userLoadedFromDBAgain.getFirstName() + "]");

   /* 8. Delete the user */
   persistenceLayer.deleteUser(user);
}
}

What is MyEclipse classpath anyway? is it the Build path

support-nipun

Post subject: RE: Please help : Exception ClassNotFound

Posted: Sep 22, 2008 - 05:36 PM

Registered Member

Joined: Apr 18, 2007
Posts: 5657

If you have the jar added to your project build path then you should not get this error. Import the classes using the import statement at the top of your BusinessLogic. Do the classes show in the dropdown ?

_________________
Nipun
MyEclipse Support

exlipzSnx7

Post subject: Re: RE: Please help : Exception ClassNotFound

Posted: Sep 23, 2008 - 07:50 AM

Joined: Sep 17, 2008
Posts: 17

support-nipun wrote:

When i import it [org.apache.commons.logging.logFactory] , its underlined yellow [warning] and says is never used ...

The error may have to do with BeanFactory class i'm using which is imported from [org.springframework.beans.factory.BeanFactory] ... I have tried the next for the whol of last week, i can't seem to get the solution to this!!!

exlipzSnx7

Post subject:

Posted: Sep 23, 2008 - 08:18 AM

Joined: Sep 17, 2008
Posts: 17

This [http://www.myeclipseide.com/documentation/quickstarts/hibernateandspring/] is the tutorial i'm using and something is not making sense here

Code:

package com.myeclipse.hibernatespring;

public class BusinessLogic {
public static void main(String[] args) {
/* 1. Create a new user */
Integer id = new Integer(1);
User user = new User();
user.setId(id);
user.setUsername("jdoe");
user.setPassword("1234");
user.setFirstName("John");
user.setLastName("Doe");
user.setDateCreated(Long.valueOf(System.currentTimeMillis()));

/* 2. Load the Spring bean configuration and create a bean factory */
BeanFactory beanFactory = new XmlBeanFactory(new ClassPathResource(
"applicationContext.xml"));

/* 3. Create instance of PersistenceLayer */
PersistenceLayer persistenceLayer = (PersistenceLayer) beanFactory
.getBean("persistenceLayer");

/* 4. Save the new user to the database */
persistenceLayer.addUser(user);

/* 5. Confirm that our user was saved */
User userLoadedFromDB = persistenceLayer.findUserById(id);
System.out.println("User Loaded from DB [username="
+ userLoadedFromDB.getUsername() + ", password="
+ userLoadedFromDB.getPassword() + ", firstName="
+ userLoadedFromDB.getFirstName() + ", lastName="
+ userLoadedFromDB.getLastName() + "]");

/* 6. Update the user */
userLoadedFromDB.setFirstName("Johnathan");
persistenceLayer.updateUser(userLoadedFromDB);

/* 7. Confirm that the update worked */
User userLoadedFromDBAgain = persistenceLayer
.findUserById(id);
System.out.println("User Loaded from DB Again [firstName="
+ userLoadedFromDBAgain.getFirstName() + "]");

/* 8. Delete the user */
persistenceLayer.deleteUser(user);
}
}

This class does not import anything ... If i copy and paste it i get errors BeanFactory cannot be resolve, which is the reason i imported the suggested classes... This tut as i said before is not very clear at some points

Support-Brian

Post subject:

Posted: Sep 24, 2008 - 09:38 PM

Moderator

Joined: Aug 21, 2004
Posts: 1294

Could you please paste the contents of the .classpath file in your project here? The .classpath file is in the root of your project, it may be filtered in the Package Explorer so you can either unhide it or access the file from windows explorer.

_________________
Brian
MyEclipse Support

exlipzSnx7

Post subject:

Posted: Sep 25, 2008 - 09:38 AM

Joined: Sep 17, 2008
Posts: 17

Support-Brian wrote:

here...

Code:

<?xml version="1.0" encoding="UTF-8"?>
<classpath>
<classpathentry kind="src" path="src"/>
<classpathentry kind="con" path="org.eclipse.jdt.launching.JRE_CONTAINER"/>
<classpathentry kind="con" path="melibrary.com.genuitec.eclipse.hibernate.MYECLIPSE_HIBERNATE3_2_EM"/>
<classpathentry kind="con" path="melibrary.com.genuitec.eclipse.hibernate.MYECLIPSE_HIBERNATE3_2_CORE"/>
<classpathentry kind="lib" path="lib/mysql-connector-java-5.1.6-bin.jar"/>
<classpathentry kind="con" path="melibrary.com.genuitec.eclipse.springframework.MYECLIPSE_SPRING25_CORE"/>
<classpathentry kind="con" path="org.eclipse.jdt.USER_LIBRARY/Springframework-2.5-User"/>
<classpathentry kind="lib" path="C:/Spring-framework-2.5.5/lib/hibernate/commons-logging-1.1.1.jar"/>
<classpathentry kind="output" path="bin"/>
</classpath>