Hibernate Annotations and Spring
Let us make the previous Hibernate Application to Spring application with the same entity class Item.java and Sale.java
Step 1:
Let us make DAO classes MyDAO.java and MyDAOImpl.java
//MyDAO.java
package me.gs.dao;
import me.gs.model.Item;
import me.gs.model.Sale;
public interface MyDAO {
public void saveItem(Item item);
public void saveSale(Sale sale);
}
//MyDAOImpl.java
package me.gs.dao;
import me.gs.model.Item;
import me.gs.model.Sale;
import org.hibernate.SessionFactory;
import org.springframework.beans.factory.annotation.Autowired; import org.springframework.orm.hibernate3.HibernateTemplate;
import org.springframework.stereotype.Repository;
@Repository("MyDAO")
public class MyDAOImpl implements MyDAO
{
private HibernateTemplate hibernateTemplate;
@Autowired
public void createHibernateTemplate(SessionFactory sessionFactory)
{
this.hibernateTemplate = new HibernateTemplate(sessionFactory);
}
public void saveItem(Item item)
{
hibernateTemplate.save(item);
}
public void saveSale(Sale sale)
{
hibernateTemplate.save(sale);
}
}
Step 2:
Add jdbc.properties file inside the WEB-INF directory with bellow code
jdbc.driverClassName=com.mysql.jdbc.Driver jdbc.url=jdbc:mysql://localhost:3306/my jdbc.username=root jdbc.password=
Step 3:
we may remove bellow code from hibernate.cfg.xml or comment or let it be exist in fact its not needed as we added jdbc.properties file
< property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect < /property> <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property> <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/my</property> <property name="hibernate.connection.username">root</property>
Step 4:
Locate the applicationContext.xml and edit with the bellow code inside the WEB-INF folder
Step 5: Let us make a jUnit test class to test the application this time.
import me.gs.dao.MyDAO;
import me.gs.model.Item;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.FileSystemXmlApplicationContext;
public class TestSpring
{
public TestSpring()
{
}
@Test
public void testSpringHB()
{
ApplicationContext context = new FileSystemXmlApplicationContext("web/WEB-INF/applicationContext.xml");
MyDAO idao = (MyDAO) context.getBean("MyDAO");
Item item = new Item();
item.setName("item3");
item.setCode("code3");
idao.saveItem(item);
}
}
Output comes as bellow:
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