hiberante4连接oracle数据库入门
2015-09-01 11:45
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一个简单入门案例:
1.项目目录结构:
2.org.hibernate.tutorial.domain
hibernate.cfg.xml
HibernateUtil.java
1.项目目录结构:
2.org.hibernate.tutorial.domain
package org.hibernate.tutorial.domain; import java.util.Date; public class Event { private Long id; private String title; private Date date; public Event() { } public Long getId() { return id; } public void setId(Long id) { this.id = id; } public String getTitle() { return title; } public void setTitle(String title) { this.title = title; } public Date getDate() { return date; } public void setDate(Date date) { this.date = date; } }Event.hbm.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="org.hibernate.tutorial.domain"> <class name="org.hibernate.tutorial.domain.Event" table="TB_Event"> <id name="id" column="EVENT_ID" type="long"> <generator class="native"></generator> </id> <property name="title" column="EVENT_TITLE" type="string"></property> <property name="date" column="EVENT_DATE" type="timestamp"></property> </class> </hibernate-mapping>
hibernate.cfg.xml
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <property name="hibernate.connection.driver_class">oracle.jdbc.driver.OracleDriver</property> <property name="hibernate.connection.url">jdbc:oracle:thin:@localhost:1521:mrdb</property> <property name="hibernate.connection.username">claim</property> <property name="hibernate.connection.password">admin</property> <property name="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</property> <property name="hibernate.show_sql">true</property> <property name="hibernate.format_sql">true</property> <property name="hibernate.hbm2ddl.auto">update</property> <property name="hibernate.jdbc.fetch_size">100</property> <property name="hibernate.jdbc.batch_size">30</property> <!-- 配置二级缓存 <property name="hibernate.cache.use_second_level_cache">true</property> <property name="hibernate.cache.use_query_cache">true</property> --> <!-- Hibernate4 这里和Hibernate3不一样 要特别注意!!! <property name="hibernate.cache.region.factory_class">org.hibernate.cache.EhCacheRegionFactory</property> --> <!-- Hibernate3 --> <!-- <property name="hibernate.cache.provider_class">org.hibernate.cache.EhCacheProvider</property> --> <!-- 配置C3P0 --> <property name="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider</property> <property name="hibernate.c3p0.max_size">10</property> <property name="hibernate.c3p0.min_size">1</property> <property name="hibernate.c3p0.max_statements">3</property> <property name="hibernate.c3p0.timeout">30</property> <property name="hibernate.c3p0.acquire_increment">1</property> <property name="hibernate.c3p0.idle_test_periodt">10</property> <mapping resource="org/hibernate/tutorial/domain/Event.hbm.xml" /> </session-factory> </hibernate-configuration>3.org.hibernate.tutorial.util
HibernateUtil.java
package org.hibernate.tutorial.util; import org.hibernate.SessionFactory; import org.hibernate.cfg.Configuration; import org.hibernate.service.ServiceRegistry; import org.hibernate.service.ServiceRegistryBuilder; public class HibernateUtil { private static SessionFactory bulidSessionFactory(){ try{ Configuration cfg = new Configuration().configure(); ServiceRegistry serviceRegistry = new ServiceRegistryBuilder().applySettings(cfg.getProperties()).buildServiceRegistry(); SessionFactory sessionFactory = cfg.buildSessionFactory(serviceRegistry); return sessionFactory; }catch(Exception ex){ System.err.println("Initial SessionFactory creation failed." + ex); throw new ExceptionInInitializerError(ex); } } private static final SessionFactory sessionFactory = bulidSessionFactory(); public static SessionFactory getSessionFactory() { return sessionFactory; } }4.用来测试的
package org.hibernate.tutorial.test; import java.util.Date; import org.hibernate.Session; import org.hibernate.SessionFactory; import org.hibernate.tutorial.domain.Event; import org.hibernate.tutorial.util.HibernateUtil; public class EventManager { public static void main(String[] args) { SessionFactory sessionFactory = HibernateUtil.getSessionFactory(); Session session = sessionFactory.openSession(); session.beginTransaction(); Event theEvent = new Event(); theEvent.setTitle("开学啦"); theEvent.setDate(new Date()); session.save(theEvent); session.getTransaction().commit(); session.close(); } }
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