inject like following, it'll work fine
@Autowired
@Qualifier("sessionFactory")
private SessionFactory sessionFactory;
public Session getSession() {
return sessionFactory.getCurrentSession();
}
Hope to help you:)
Question
My SessionFactory isn't being injected to SessionFactory variable. My configuration is as follows:
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd
http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-3.2.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-3.2.xsd">
<mvc:annotation-driven/>
<tx:annotation-driven/>
<context:annotation-config/>
<!-- Scans the package for contents -->
<context:component-scan base-package="com.csu.library.mvc"/>
<!-- Maps static resources like images, css, javascript files -->
<mvc:resources location="/resources/" mapping="/resources/**"/>
<bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name = "viewClass" value = "org.springframework.web.servlet.view.JstlView"/>
<property name = "prefix" value = "/WEB-INF/jsps/"/>
<property name = "suffix" value = ".jsp"/>
</bean>
<bean id="dataSource" destroy-method="close" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver"/>
<property name="url" value="jdbc:mysql://localhost:3306/csu_library"/>
<property name="username" value="csulibrary"/>
<property name="password" value="csulibrary"/>
<!-- Pool Properties -->
<property name="initialSize" value="5" />
<property name="maxIdle" value="5" />
<property name="maxActive" value="10" />
</bean>
<bean id = "hibernateProperties" class = "java.util.Properties">
<constructor-arg index="0">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
<prop key="hibernate.cglib.use_reflection_optimizer">true</prop>
<prop key="hibernate.cache.provider_class">org.hibernate.cache.HashtableCacheProvider</prop>
</props>
</constructor-arg>
</bean>
<bean id = "sessionFactory" class = "org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="packagesToScan" value = "com.csu.library.mvc"/>
<property name="dataSource" ref = "dataSource"/>
<property name="hibernateProperties" ref = "hibernateProperties"/>
</bean>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name = "sessionFactory" ref = "sessionFactory"/>
</bean>
</beans>
HibernateUtil.class
package com.csu.library.mvc.hibernate;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.orm.hibernate4.HibernateExceptionTranslator;
import org.springframework.orm.hibernate4.HibernateTransactionManager;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@org.springframework.context.annotation.Configuration
@EnableTransactionManagement
public class HibernateUtil {
@Autowired
@Qualifier("sessionFactory")
private SessionFactory sessionFactory;
public SessionFactory getSessionFactory() {
return sessionFactory;
}
@Bean
public HibernateTransactionManager transactionManager() {
return new HibernateTransactionManager(getSessionFactory());
}
@Bean
public HibernateExceptionTranslator exceptionTranslator() {
return new HibernateExceptionTranslator();
}
}
The program throws NullPointerException when getSessionFactory() method is called. Obviously, sessionFactory isn't being injected. The program starts up fine. What could be the problem?
La solution
inject like following, it'll work fine
@Autowired
@Qualifier("sessionFactory")
private SessionFactory sessionFactory;
public Session getSession() {
return sessionFactory.getCurrentSession();
}
Hope to help you:)
Autres conseils
In some Spring versions, sub folders are not scanned. Either move your class in the package com.csu.library.mvc or add the package com.csu.library.mvc.hibernate in the scanned packages and give it a try.
You'll want to use the org.springframework.beans.factory.annotation.Autowired
annotation instead of javax.inject.Inject
.
@Autowired
private SessionFactory sessionFactory;
Note that only looks for annotations on beans in the same application context it is defined in. This means that, if you put in a WebApplicationContext for a DispatcherServlet, it only checks for @Autowired beans in your controllers, and not your services.