Hibernate4学习（一）入门

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    笔者的第一个hibernate框架应用入门例子 hibernate版本号是 4.3.11

1. hibernate核心配置文件hibernate.cfg.xml, 笔者将配置文件放在conf.hibernate包下，配置内容如下

   
   
   
   
       
   
           
           com.mysql.jdbc.Driver
           
           	jdbc:mysql://127.0.0.1:3306/lian?autoReconnect=true&useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&useSSL=false
           
           root
           root
   		
           
           5
   		
   		
           
           org.hibernate.dialect.MySQL5InnoDBDialect
   
           
           thread
   
           
           org.hibernate.cache.internal.NoCacheProvider
   
           
           true
   
           
           update
   		
           
   
       
   
   

    
2. 实体类映射文件Music.hbm.xml，该配置文件放在conf.hibernate.domain路径下
    
3. 实体类org.lian.domain.Music.java

   public class Music {
   	private String id;
   	/**
   	 * 名称
   	 */
   	private String name;
   	/**
   	 * 歌手
   	 */
   	private String singer;
   	/**
   	 * 专辑
   	 */
   	private String album;
   	/**
   	 * 歌曲时长
   	 */
   	private String duration;
   	//作词
   	private String author;
   	//作曲
   	private String composer;
   	//风格
   	private String style;
   

    
4. hibernateUtil.java 根据配置文件Hibernate创建SessionFactory

   public class HibernateUtil {
   	private static final SessionFactory sessionFactory = buildSessionFactory();
   
   	private static SessionFactory buildSessionFactory() {
   		try {
   			// Create the SessionFactory from hibernate.cfg.xml
   			// return new
   			// Configuration().configure("/conf/hibernate/hibernate.cfg.xml")
   			// .buildSessionFactory(new StandardServiceRegistryBuilder().build());
   			Configuration configuration = new Configuration();
   			configuration.configure("/conf/hibernate/hibernate.cfg.xml");
   			ServiceRegistry serviceRegistry = new StandardServiceRegistryBuilder()
   					.applySettings(configuration.getProperties()).build();
   			SessionFactory sessionFactory = configuration
   					.buildSessionFactory(serviceRegistry);
   			return sessionFactory;
   
   		} catch (Throwable ex) {
   			// Make sure you log the exception, as it might be swallowed
   			System.err.println("Initial SessionFactory creation failed." + ex);
   			throw new ExceptionInInitializerError(ex);
   		}
   	}
   
   	public static SessionFactory getSessionFactory() {
   		return sessionFactory;
   	}
   
   }

    
5. 测试类Main.java

   public class Main {
   
   	public static void main(String[] args) {
   		// 获取session连接
   		Session session = HibernateUtil.getSessionFactory().getCurrentSession();
   		session.beginTransaction();
   		Music music = new Music();
   		music.setName("红色高跟鞋");
   		music.setAuthor("蔡健雅");
   		music.setSinger("蔡健雅");
   		music.setComposer("蔡健雅");
   		music.setAlbum("若你碰到他");
   		music.setDuration("03:26");
   		session.save(music);
   		session.getTransaction().commit();
   		// 关闭session工厂
   		HibernateUtil.getSessionFactory().close();
   	}
   }