Spring 3 doesn't inject DAO bean - spring

Question

I'm using Spring 3 and UserServiceImpl. The service does not see the Dao bean.
This is my UserDao:
#Repository
public class UserDaoImpl implements UserDao {
private SessionFactory sessionFactory;
public SessionFactory getSessionFactory() {
return this.sessionFactory;
}
#Autowired
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
private Session currentSession() {
return sessionFactory.getCurrentSession();
}
}
Then the Service bean :
public class UserServiceImpl implements UserService {
#Autowired
private UserDao userDao;
public void setUserDao(UserDao userDao) {
this.userDao = userDao;
}
public String testeoDAO() {
return userDao.funciona();
}
}
The testeoDAO method had writeen only for testing the DAO.The applicationContext
<context:annotation-config/>
<bean id="userDao" class="com.apress.usermanager.dao.hibernate.UserDaoImpl">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<bean id="userService" class="com.apress.usermanager.service.UserServiceImpl">
<property name="userDao" ref="userDao"/>
</bean>
<bean class="org.springframework.beans.factory.annotation.RequiredAnnotationBeanPostProcessor"/>
<bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"
autowire="byName">
<property name="dataSource" ref="dataSource"/>
<property name="packagesToScan" value="com.apress.usermanager"/>
<property name="configLocation" value="classpath:hibernate.cfg.xml"/>
<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect
hibernate.query.substitutions=true 'Y', false 'N'
hibernate.cache.use_second_level_cache=true
hibernate.cache.provider_class=org.hibernate.cache.EhCacheProvider
hibernate.hbm2ddl.auto=update
hibernate.use_sql_comments=true
hibernate.show_sql=true
hibernate.current_session_context_class=thread
</value>
</property>
</bean>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClassName}"/>
<property name="url" value="${jdbc.url}"/>
<property name="username" value="${jdbc.username}"/>
<property name="password" value="${jdbc.password}"/>
<property name="maxActive" value="100"/>
<property name="maxWait" value="1000"/>
<property name="poolPreparedStatements" value="true"/>
<property name="defaultAutoCommit" value="true"/>
<property name="testOnBorrow" value="true"/>
<property name="validationQuery" value="select 1=1"/>
</bean>
<bean id="staticDataImporter" class="com.apress.usermanager.support.StaticDataImporter" depends-on="sessionFactory">
<property name="dataSource" ref="dataSource"/>
<property name="staticData" value="classpath:default-data.xml"/>
</bean>
<bean class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
And the error :
java.lang.NullPointerException
at com.apress.usermanager.service.UserServiceImpl.testeoDAO(UserServiceImpl.java:49)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)

Answer 1

I think you need to add
<context:component-scan base-package="com.a,com.b">
</context:component-scan>
To scan package com.a and com.b. This allows the classpath scan and add all #Component and so forth to it.
Annote UserServiceImpl with #Service.
Regards.