hibernate 4.1.5 学习笔记(1) -

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hibernate 4.1.5 学习笔记(1)

博客分类：

hibernate

hibernate

hibernate 学习记录：

1. 在eclipse中新建一个web项目，然后添加hibernate 4.1.5中的jar包到项目中，主要是“hibernate-release-4.1.5.Final\lib\required” 目录中的jar包

2. 由于我使用的mysql 5.0 ，所以要添加 mysql-connector的jar包到项目中。

3. 添加junit的jar包到项目中，因为项目测试要用到这个jar包

4.在mysql 中建立一个数据库，在hibernate的配置文件中要用到，例如：buy360

5.在项目的src 目录下添加 hibernate.cfg.xml 内容如下：

<?xml version='1.0' encoding='utf-8'?>
<!--
  ~ Hibernate, Relational Persistence for Idiomatic Java
  ~
  ~ Copyright (c) 2010, Red Hat Inc. or third-party contributors as
  ~ indicated by the @author tags or express copyright attribution
  ~ statements applied by the authors.  All third-party contributions are
  ~ distributed under license by Red Hat Inc.
  ~
  ~ This copyrighted material is made available to anyone wishing to use, modify,
  ~ copy, or redistribute it subject to the terms and conditions of the GNU
  ~ Lesser General Public License, as published by the Free Software Foundation.
  ~
  ~ This program is distributed in the hope that it will be useful,
  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  ~ or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
  ~ for more details.
  ~
  ~ You should have received a copy of the GNU Lesser General Public License
  ~ along with this distribution; if not, write to:
  ~ Free Software Foundation, Inc.
  ~ 51 Franklin Street, Fifth Floor
  ~ Boston, MA  02110-1301  USA
  -->
<!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>

        <!-- Database connection settings -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost/buy360</property>
        <property name="connection.username">root</property>
        <property name="connection.password">root</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">1</property>

        <!-- SQL dialect -->
        <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <property name="hbm2ddl.auto">create</property>

        <mapping resource="com/buy/user/Event.hbm.xml"/>

    </session-factory>

</hibernate-configuration>

6. 然后创建一个实体类（javabean），代码如下：

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package com.buy.user;

import java.util.Date;

public class Event {
	private Long id;

	private String title;
	private Date date;

	public Event() {
		// this form used by Hibernate
	}

	public Event(String title, Date date) {
		// for application use, to create new events
		this.title = title;
		this.date = date;
	}

	public Long getId() {
		return id;
	}

	private void setId(Long id) {
		this.id = id;
	}

	public Date getDate() {
		return date;
	}

	public void setDate(Date date) {
		this.date = date;
	}

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}
}

7. 在实体类的目录下，添加 Events.hbm.xml , 内容如下：

<?xml version="1.0"?>

<!--
  ~ Hibernate, Relational Persistence for Idiomatic Java
  ~
  ~ Copyright (c) 2010, Red Hat Inc. or third-party contributors as
  ~ indicated by the @author tags or express copyright attribution
  ~ statements applied by the authors.  All third-party contributions are
  ~ distributed under license by Red Hat Inc.
  ~
  ~ This copyrighted material is made available to anyone wishing to use, modify,
  ~ copy, or redistribute it subject to the terms and conditions of the GNU
  ~ Lesser General Public License, as published by the Free Software Foundation.
  ~
  ~ This program is distributed in the hope that it will be useful,
  ~ but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  ~ or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
  ~ for more details.
  ~
  ~ You should have received a copy of the GNU Lesser General Public License
  ~ along with this distribution; if not, write to:
  ~ Free Software Foundation, Inc.
  ~ 51 Franklin Street, Fifth Floor
  ~ Boston, MA  02110-1301  USA
  -->

<!DOCTYPE hibernate-mapping PUBLIC
        "-//Hibernate/Hibernate Mapping DTD 3.0//EN"
        "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd">

<hibernate-mapping package="com.buy.user">

    <class name="Event" table="EVENTS">
        <id name="id" column="EVENT_ID">
            <generator class="increment"/>
        </id>
        <property name="date" type="timestamp" column="EVENT_DATE"/>
        <property name="title"/>
    </class>

</hibernate-mapping>

8. 然后创建一个测试类AnnotationsIllustrationTest.java ，代码如下：

/*
 * Hibernate, Relational Persistence for Idiomatic Java
 *
 * Copyright (c) 2010, Red Hat Inc. or third-party contributors as
 * indicated by the @author tags or express copyright attribution
 * statements applied by the authors.  All third-party contributions are
 * distributed under license by Red Hat Inc.
 *
 * This copyrighted material is made available to anyone wishing to use, modify,
 * copy, or redistribute it subject to the terms and conditions of the GNU
 * Lesser General Public License, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
 * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU Lesser General Public License
 * for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this distribution; if not, write to:
 * Free Software Foundation, Inc.
 * 51 Franklin Street, Fifth Floor
 * Boston, MA  02110-1301  USA
 */
package com.buy.user.test;

import java.util.Date;
import java.util.List;

import junit.framework.TestCase;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;
import org.hibernate.service.ServiceRegistry;
import org.hibernate.service.ServiceRegistryBuilder;

import com.buy.user.Event;

/**
 * Illustrates the use of Hibernate native APIs.  The code here is unchanged from the {@code basic} example, the
 * only difference being the use of annotations to supply the metadata instead of Hibernate mapping files.
 *
 * @author Steve Ebersole
 */
public class AnnotationsIllustrationTest extends TestCase {
	private SessionFactory sessionFactory;
	private ServiceRegistry serviceRegistry;

	@Override
	protected void setUp() throws Exception {
		// A SessionFactory is set up once for an application
		Configuration cfg = new Configuration();  
        cfg.configure(); 
		serviceRegistry = new ServiceRegistryBuilder().applySettings(cfg.getProperties()).buildServiceRegistry();
        sessionFactory = new Configuration()
                .configure() // configures settings from hibernate.cfg.xml
                .buildSessionFactory(serviceRegistry);
	}

	@Override
	protected void tearDown() throws Exception {
		if ( sessionFactory != null ) {
			sessionFactory.close();
		}
	}

	@SuppressWarnings({ "unchecked" })
	public void testBasicUsage() {
		// create a couple of events...
		Session session = sessionFactory.openSession();
		session.beginTransaction();
		session.save( new Event( "Our very first event!", new Date() ) );
		session.save( new Event( "A follow up event", new Date() ) );
		session.getTransaction().commit();
		session.close();

		// now lets pull events from the database and list them
		session = sessionFactory.openSession();
        session.beginTransaction();
        List result = session.createQuery( "from Event" ).list();
		for ( Event event : (List<Event>) result ) {
			System.out.println( "Event (" + event.getDate() + ") : " + event.getTitle() );
		}
        session.getTransaction().commit();
        session.close();
	}
}

9. 运行测试类，出现下列结果，表示成功。

2012-7-18 14:27:37 org.hibernate.annotations.common.Version <clinit>
INFO: HCANN000001: Hibernate Commons Annotations {4.0.1.Final}
2012-7-18 14:27:37 org.hibernate.Version logVersion
INFO: HHH000412: Hibernate Core {4.1.5.Final}
2012-7-18 14:27:37 org.hibernate.cfg.Environment <clinit>
INFO: HHH000206: hibernate.properties not found
2012-7-18 14:27:37 org.hibernate.cfg.Environment buildBytecodeProvider
INFO: HHH000021: Bytecode provider name : javassist
2012-7-18 14:27:37 org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
2012-7-18 14:27:37 org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
2012-7-18 14:27:38 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: com/buy/user/Event.hbm.xml
2012-7-18 14:27:38 org.hibernate.cfg.Configuration doConfigure
INFO: HHH000041: Configured SessionFactory: null
2012-7-18 14:27:38 org.hibernate.cfg.Configuration configure
INFO: HHH000043: Configuring from resource: /hibernate.cfg.xml
2012-7-18 14:27:38 org.hibernate.cfg.Configuration getConfigurationInputStream
INFO: HHH000040: Configuration resource: /hibernate.cfg.xml
2012-7-18 14:27:38 org.hibernate.cfg.Configuration addResource
INFO: HHH000221: Reading mappings from resource: com/buy/user/Event.hbm.xml
2012-7-18 14:27:38 org.hibernate.cfg.Configuration doConfigure
INFO: HHH000041: Configured SessionFactory: null
2012-7-18 14:27:39 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000402: Using Hibernate built-in connection pool (not for production use!)
2012-7-18 14:27:39 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000115: Hibernate connection pool size: 1
2012-7-18 14:27:39 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000006: Autocommit mode: false
2012-7-18 14:27:39 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000401: using driver [com.mysql.jdbc.Driver] at URL [jdbc:mysql://localhost/buy360]
2012-7-18 14:27:39 org.hibernate.service.jdbc.connections.internal.DriverManagerConnectionProviderImpl configure
INFO: HHH000046: Connection properties: {user=root, password=****}
2012-7-18 14:27:40 org.hibernate.dialect.Dialect <init>
INFO: HHH000400: Using dialect: org.hibernate.dialect.MySQL5Dialect
2012-7-18 14:27:40 org.hibernate.engine.jdbc.internal.LobCreatorBuilder useContextualLobCreation
INFO: HHH000423: Disabling contextual LOB creation as JDBC driver reported JDBC version [3] less than 4
2012-7-18 14:27:40 org.hibernate.engine.transaction.internal.TransactionFactoryInitiator initiateService
INFO: HHH000399: Using default transaction strategy (direct JDBC transactions)
2012-7-18 14:27:40 org.hibernate.hql.internal.ast.ASTQueryTranslatorFactory <init>
INFO: HHH000397: Using ASTQueryTranslatorFactory
2012-7-18 14:27:41 org.hibernate.tool.hbm2ddl.SchemaExport execute
INFO: HHH000227: Running hbm2ddl schema export
Hibernate: drop table if exists EVENTS
Hibernate: create table EVENTS (EVENT_ID bigint not null, EVENT_DATE datetime, title varchar(255), primary key (EVENT_ID))
2012-7-18 14:27:41 org.hibernate.tool.hbm2ddl.SchemaExport execute
INFO: HHH000230: Schema export complete
Hibernate: select max(EVENT_ID) from EVENTS
Hibernate: insert into EVENTS (EVENT_DATE, title, EVENT_ID) values (?, ?, ?)
Hibernate: insert into EVENTS (EVENT_DATE, title, EVENT_ID) values (?, ?, ?)
Hibernate: select event0_.EVENT_ID as EVENT1_0_, event0_.EVENT_DATE as EVENT2_0_, event0_.title as title0_ from EVENTS event0_
Event (2012-07-18 14:27:41.0) : Our very first event!
Event (2012-07-18 14:27:41.0) : A follow up event

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