Error: Bean property 'userDAO' is not writable or has an invalid setter method.

[vikas sharmaa]

i am getting below wiring error while trying to integrate Spring 3 with hibernate. I followed this site vaannila

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userService' defined in ServletContext resource [/WEB-INF/dispatcher-servlet.xml]: Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'userDAO' of bean class [com.myworld.service.UserServiceImpl]: Bean property 'userDAO' is not writable or has an invalid setter method. Does the parameter type of the setter match the return type of the getter?
	org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1344)

here is my code:

userService defined in dispatcher-servlet.xml:

	<bean id="userService" class="com.myworld.service.UserServiceImpl">
		<property name="userDAO" ref="myUserDAO" /> 
	</bean>

myUserDAO defined in dispatcher-servlet.xml:

	<bean id="myUserDAO" class="com.myworld.dao.UserDAOImpl">
		<property name="sessionFactory" ref="mySessionFactory"/>
	</bean>

UserServiceImpl class:

public class UserServiceImpl implements UserService {

	@Autowired
	private UserDAO userDAO;

	@Override
	public void add(User user) {
		
		userDAO.saveUser(user);
                 }
}

UserDAOImpl class:

public class UserDAOImpl implements UserDAO {

	private HibernateTemplate hibernateTemplate;

	public void setSessionFactory(SessionFactory sessionFactory) { 

		this.hibernateTemplate = new HibernateTemplate(sessionFactory); 
	} 

	@Override
	public void saveUser(User user) {
		hibernateTemplate.saveOrUpdate(user);
	}
}

please let me know, where i am going wrong. thank you.

[vikas sharmaa]

please some expert respond to my query. or do i need to provide more code. please help.

[vikas sharmaa]

please, anybody here to help me out. Thank you.

[Lorand Komaromi]

Remove the @Autowired annotation from userDAO (you're specifying explicitly the dependency with the property tag...), and add a public setter for userDAO!

[vikas sharmaa]

Thank you very much Lonard, its now working after removing the Autowired!

But, I have a confusion. I am explicitly specifying the dependency of userService bean also with the property tag. And am able to Autowired userService bean as shown below:

public class UserController {

	@Autowired
	private UserService userService;
}

Please guide me, why Autowired annotation is working here. Thank you.