Error creating bean with name 'dao' - eclipse

Question

i dont know ahy i got this error when i wanna test my app using spring beans this the main test :
public class Test {
public static void main(String[] args) {
ClassPathXmlApplicationContext context=
new ClassPathXmlApplicationContext(new String[]
{"applicationContext.xml"});
IBanqueMetier metier=(IBanqueMetier) context.getBean("metier");
metier.addClient(new Client("C1", "AD1"));
metier.addClient(new Client("C2", "AD2"));
}
and this the 1rst error :
Exception in thread "main"org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'dao': Injection of persistence dependencies
failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [applicationContext.xml]: Invocation of init method failed; nested exception is org.hibernate.AnnotationException: Illegal attempt to map a non collection as a #OneToMany, #ManyToMany or #CollectionOfElements: org.gestion.bp.entities.Compte.employe
at org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor.postProcessPropertyValues(PersistenceAnnotationBeanPostProcessor.java:342)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1106)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:517)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:139)
at org.springframework.context.support.ClassPathXmlApplicationContext.<init>(ClassPathXmlApplicationContext.java:93)

Answer 1

With Spring exceptions, it's important that you read the whole message up to the very end. I usually split the message into several lines to make it more readable:
Exception in thread "main"org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'dao': Injection of persistence dependencies failed;
nested exception is org.springframework.beans.factory.BeanCreationException:
Error creating bean with name 'entityManagerFactory' defined in class path resource [applicationContext.xml]:
Invocation of init method failed;
nested exception is org.hibernate.AnnotationException:
Illegal attempt to map a non collection as a #OneToMany, #ManyToMany or #CollectionOfElements:
org.gestion.bp.entities.Compte.employe
As you can see, you made an error in the definition of the field org.gestion.bp.entities.Compte.employe