Hibernate基于注解_Oracle

不细说了直接上代码

代码中的注释可以参考Hibernate-学习笔记01

1、hibernate.cfg.xml

<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

    <session-factory>
        <property name="connection.username">its</property>
        <property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>
        <property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>
        <property name="connection.password">its</property>
        <property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>
    
    
    	<property name="current_session_context_class">thread</property>  
    	
    	<property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>  
    	
    	<property name="show_sql">true</property>  
    	<property name="format_sql">true</property>  
    	<property name="hbm2ddl.auto">update</property>    
    	
    	<!-- 配饰AnnotationConfiguration时使用的  --> 
    	<mapping class="com.scal.entity.Teacher"/> 
    	
    </session-factory>

</hibernate-configuration>

2、log4j.properties

### direct log messages to stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L - %m%n

### set log levels - for more verbose logging change 'info' to 'debug' ###

log4j.rootLogger=warn, stdout

#log4j.logger.org.hibernate=info
#log4j.logger.org.hibernate=debug

### log HQL query parser activity
#log4j.logger.org.hibernate.hql.ast.AST=debug

### log just the SQL
#log4j.logger.org.hibernate.SQL=debug

### log JDBC bind parameters ###
###log4j.logger.org.hibernate.type=info
#log4j.logger.org.hibernate.type=debug

### log schema export/update ###
log4j.logger.org.hibernate.tool.hbm2ddl=debug

### log HQL parse trees
#log4j.logger.org.hibernate.hql=debug

### log cache activity ###
#log4j.logger.org.hibernate.cache=debug

### log transaction activity
#log4j.logger.org.hibernate.transaction=debug

### log JDBC resource acquisition
#log4j.logger.org.hibernate.jdbc=debug

### enable the following line if you want to track down connection ###
### leakages when using DriverManagerConnectionProvider ###
#log4j.logger.org.hibernate.connection.DriverManagerConnectionProvider=trace

3、HibernateSessionFactory

package com.scal.entity;

import org.hibernate.HibernateException;
import org.hibernate.Session;
import org.hibernate.cfg.AnnotationConfiguration;
import org.hibernate.cfg.Configuration;

/**
 * Configures and provides access to Hibernate sessions, tied to the
 * current thread of execution.  Follows the Thread Local Session
 * pattern, see {@link http://hibernate.org/42.html }.
 */
public class HibernateSessionFactory {

    /** 
     * Location of hibernate.cfg.xml file.
     * Location should be on the classpath as Hibernate uses  
     * #resourceAsStream style lookup for its configuration file. 
     * The default classpath location of the hibernate config file is 
     * in the default package. Use #setConfigFile() to update 
     * the location of the configuration file for the current session.   
     */
    private static String CONFIG_FILE_LOCATION = "/hibernate.cfg.xml";
	private static final ThreadLocal<Session> threadLocal = new ThreadLocal<Session>();
    private  static Configuration configuration = new Configuration();    
    private static org.hibernate.SessionFactory sessionFactory;
    private static String configFile = CONFIG_FILE_LOCATION;

	static {
    	try {
    		/* 使用配置文件的获取config */
			configuration.configure(configFile);
			sessionFactory = configuration.buildSessionFactory();
		} catch (Exception e) {
			try{
				/* 使用注解的获取config */
				configuration = new AnnotationConfiguration().configure();   
				sessionFactory = configuration.buildSessionFactory();
			}catch (Exception es) {
				System.err.println("%%%% Error Creating SessionFactory %%%%");
				es.printStackTrace();
			}
			
		}
    }
    private HibernateSessionFactory() {
    }
	
	/**
     * Returns the ThreadLocal Session instance.  Lazy initialize
     * the <code>SessionFactory</code> if needed.
     *
     *  @return Session
     *  @throws HibernateException
     */
    public static Session getSession() throws HibernateException {
        Session session = (Session) threadLocal.get();

		if (session == null || !session.isOpen()) {
			if (sessionFactory == null) {
				rebuildSessionFactory();
			}
			session = (sessionFactory != null) ? sessionFactory.openSession()
					: null;
			threadLocal.set(session);
		}

        return session;
    }

	/**
     *  Rebuild hibernate session factory
     *
     */
	public static void rebuildSessionFactory() {
		try {
			configuration.configure(configFile);
			sessionFactory = configuration.buildSessionFactory();
		} catch (Exception e) {
			System.err
					.println("%%%% Error Creating SessionFactory %%%%");
			e.printStackTrace();
		}
	}

	/**
     *  Close the single hibernate session instance.
     *
     *  @throws HibernateException
     */
    public static void closeSession() throws HibernateException {
        Session session = (Session) threadLocal.get();
        threadLocal.set(null);

        if (session != null) {
            session.close();
        }
    }

	/**
     *  return session factory
     *
     */
	public static org.hibernate.SessionFactory getSessionFactory() {
		return sessionFactory;
	}

	/**
     *  return session factory
     *
     *	session factory will be rebuilded in the next call
     */
	public static void setConfigFile(String configFile) {
		HibernateSessionFactory.configFile = configFile;
		sessionFactory = null;
	}

	/**
     *  return hibernate configuration
     *
     */
	public static Configuration getConfiguration() {
		return configuration;
	}

}

4、Teacher （基于注解的实体）

package com.scal.entity;

import java.io.Serializable;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.SequenceGenerator;

@Entity
public class Teacher implements Serializable{

	private static final long serialVersionUID = 729474527745209202L;
	@Id 
	@GeneratedValue(strategy=GenerationType.SEQUENCE, generator="TEACHER_SEQ")      
	@SequenceGenerator(name="TEACHER_SEQ",allocationSize=1,initialValue=1, sequenceName="TEACHER_SEQ")
	private Long id;
	private String name;
	private String age;
	
	
	public Long getId() {
		return id;
	}
	
	public void setId(Long id) {
		this.id = id;
	}
	
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}

	public String getAge() {
		return age;
	}
	public void setAge(String age) {
		this.age = age;
	}
	public static long getSerialVersionUID() {
		return serialVersionUID;
	}
	
	
}

5、DoTest

package com.scal.run;

import org.hibernate.Session;
import org.hibernate.SessionFactory;

import com.scal.entity.HibernateSessionFactory;
import com.scal.entity.Teacher;

public class DoTest {

		public static void main(String[] args) {
			SessionFactory sf= HibernateSessionFactory.getSessionFactory();
			Session session = sf.getCurrentSession();
			
			Teacher teacher = new Teacher();
			teacher.setAge("10");
			teacher.setName("tom");
			
			session.beginTransaction();
			session.save(teacher);
			session.getTransaction().commit();
			
			sf.close();
			
		}
}