hibernate session操作

最新推荐文章于 2024-08-15 11:20:06 发布

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最新推荐文章于 2024-08-15 11:20:06 发布

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分类专栏： hibernate

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本文介绍Hibernate框架中SessionFactory的创建过程及配置文件hibernate.cfg.xml的详细设置，包括数据库连接参数、方言设置、SQL显示控制等内容。

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sessionFactory获取：

import org.hibernate.SessionFactory;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.cfg.Configuration;

public class SessionFactoryUtil {

	private static final SessionFactory sessionFactiry = getSessionFactoryInstance();
	private static SessionFactory getSessionFactoryInstance(){
		Configuration configuration = new Configuration().configure();
		StandardServiceRegistry standardServiceRegistry = new StandardServiceRegistryBuilder().applySettings(configuration.getProperties()).build();
		return configuration.buildSessionFactory(standardServiceRegistry);
	}
	public static SessionFactory getSessionFactory(){
		return sessionFactiry;
	}
}

hibernate.cfg.xml

<?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>

    <session-factory>

        <!--数据库连接设置 -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/db_hibernate</property>
        <property name="connection.username">root</property>
        <property name="connection.password">123456</property>

       
        <!-- 方言 -->
        <property name="dialect">org.hibernate.dialect.MySQL5Dialect</property>
	
        <!-- 控制台显示SQL -->
        <property name="show_sql">true</property>
        <!-- 事务隔离级别 -->
		<property name="connection.isolation ">2</property>
        <!-- 自动更新表结构 -->
        <property name="hbm2ddl.auto">update</property>
        
  		<mapping resource="com/java1111/model/Student.hbm.xml"/>
  		<mapping class="com.java1111.model.Class"/>

    </session-factory>

</hibernate-configuration>

Student.hbm.xml

<hibernate-mapping package="com.java1234.model">

	<class name="Student" table="t_student">
		
		<id name="id" column="id">
			<generator class="native"></generator>
		</id>
		<property name="name" column="name"></property>
		<property name="password" column="psd"></property>
		<many-to-one name="c" column="classId" class="com.java1111.model.Class" cascade="save-update"></many-to-one>
	</class>

</hibernate-mapping>