Hibernate 的初始化

public static void main(String[] args) {
		//方法1.使用hibernate.cfg.xml作为hibernate的配置文件的时候
		/**
		 * new Configuration().configure()会负责加载 上面的配置文件
		 */
		Configuration conf=new Configuration().configure();

		//方法2.使用hibernate.properties 文件做为hibernate 的配置文件的时候
		/**
		 * Configuration conf=new Configuration()
		 * conf.addResource("Item.hbm.xml");
		 * conf.addResource("News.hbm.xml");
		 * 来添加文件
		 */
		//方法3.没有配置文件的时候 使用 下面的方法来添加 参数
		/*conf.setProperties(properties); //或者将下面的一些属性放到 Propeties文件中
			conf.setProperty("hibernate.driver_class","com.mysql.jdbc.Driver")
			.setProperty("hibernate.connection.url","jdbc:mysql://localhost:3306/test")
			.setProperty("hibernate.dialect","org.hibernate.dialect.MySQLInnoDBDialet")
			.addClass( com.crazyit.app.domain.News.class)
			.addResource("News.hbm.xml");
			conf.addClass(com.crazyit.app.domain.News.class);
		*/
		SessionFactory sf= conf.buildSessionFactory();
		Session sess=sf.openSession();
		Transaction tr=sess.beginTransaction();
		sess.save(new Object());
		tr.commit();
		sess.close();
		sf.close();
	}

<?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="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="hibernate.connection.url">jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8</property>
        <property name="hibernate.connection.password">123456</property>
        <property name="hibernate.connection.username">root</property>
        <property name="hibernate.dialect">org.hibernate.dialect.MySQLInnoDBDialect</property>
        <property name="hibernate.c3p0.max_size">20</property> 
		<property name="hibernate.c3p0.min_size">2</property> 
		<property name="hibernate.c3p0.timeout">5000</property> 
		<property name="hibernate.c3p0.max_statements">100</property> 
		<property name="hibernate.c3p0.idle_test_period">3000</property> 
		<property name="hibernate.c3p0.acquire_increment">2</property>
		<property name="hibernate.c3p0.validate">false</property>
		<!-- 设置指定是否需要根据hibernate 映射文件来创建数据库 -->
		<property name="hibernate.hbm2ddl.auto">update</property>
		<!-- 设置是否显示sql语句 -->
		<property name="hibernate.show_sql">true</property>
		<!-- 设置是否格式化sql语句 -->
		<property name="hibernate.format_sql">true</property>
		<!-- 采用配置文件 -->
		<mapping resource="com/crazyit/app/domain/News.hbm.xml"/>

		<!-- 采用注解 配置持久化类 -->
		<mapping class="com.crazyit.app.domain.anno.StudentAnn"/>
    </session-factory>
</hibernate-configuration>