hibernate 操作工具类

package cn.itcast.lucene.utils;

import org.hibernate.Session;
import org.hibernate.SessionFactory;
import org.hibernate.cfg.Configuration;

/**
 * hibernate 操作工具类
 * 
 * @author liao
 * 
 */
public class HibernateUtils {
	private static Configuration configuration;
	private static SessionFactory sessionFactory;

	static {
		configuration = new Configuration().configure();
		sessionFactory = configuration.buildSessionFactory();
	}

	public static Session openSession() {
		return sessionFactory.openSession();
	}

	//检测是否能连接数据库
	public static void main(String[] args) {

	}
}

<?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>
	<!-- JDBC基本连接参数 -->
	<session-factory> <!-- 理解为连接池 -->
		<property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
		<property name="hibernate.connection.url">jdbc:mysql:///hibernate3day1</property>
		<property name="hibernate.connection.username">root</property>
		<property name="hibernate.connection.password">abc</property>
		<!-- 配置方言 -->
		<property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
		
		<!-- 常见其它配置 -->
		<property name="hibernate.show_sql">true</property> <!-- 控制台上打印SQL -->
		<property name="hibernate.format_sql">true</property> <!-- 控制台输出时，对SQL语句格式化 -->
		<!-- 测试环境 create/ create-drop 正式环境 update validate -->
		<property name="hibernate.hbm2ddl.auto">update</property> <!-- 自动建表 -->
		
		<property name="hibernate.connection.autocommit">true</property>
		
		<!-- 在核心配置文件中 引用 mapping 映射文件 -->

	</session-factory>
</hibernate-configuration>