<?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>

<!-- Hibernate 连接数据库的基本信息 -->

<property name="connection.username">scott</property>

<property name="connection.password">java</property>

<property name="connection.driver_class">oracle.jdbc.driver.OracleDriver</property>

<property name="connection.url">jdbc:oracle:thin:@localhost:1521:orcl</property>

<!-- Hibernate 的基本配置 -->

<!-- Hibernate 使用的数据库方言 -->

<property name="dialect">org.hibernate.dialect.Oracle10gDialect</property>

<!-- 运行时是否打印 SQL -->

<property name="show_sql">true</property>

<!-- 运行时是否格式化 SQL -->

<property name="format_sql">true</property>

<!-- 生成数据表的策略 -->

<property name="hbm2ddl.auto">update</property>

<!-- 设置 Hibernate 的事务隔离级别 -->

<property name="connection.isolation">2</property>

<!-- 删除对象后, 使其 OID 置为 null -->

<property name="use_identifier_rollback">true</property>

<!-- 配置 C3P0 数据源 -->

<!--

<property name="hibernate.c3p0.max_size">10</property>

<property name="hibernate.c3p0.min_size">5</property>

<property name="c3p0.acquire_increment">2</property>

<property name="c3p0.idle_test_period">2000</property>

<property name="c3p0.timeout">2000</property>

<property name="c3p0.max_statements">10</property>

-->

<!-- 设定 JDBC 的 Statement 读取数据的时候每次从数据库中取出的记录条数 -->

<property name="hibernate.jdbc.fetch_size">100</property>

<!-- 设定对数据库进行批量删除，批量更新和批量插入的时候的批次大小 -->

<property name="jdbc.batch_size">30</property>

<!-- 启用二级缓存 -->

<property name="cache.use_second_level_cache">true</property>

<!-- 配置使用的二级缓存的产品 -->

<property name="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</property>

<!-- 配置启用查询缓存 -->

<property name="cache.use_query_cache">true</property>

<!-- 配置管理 Session 的方式 -->

<property name="current_session_context_class">thread</property>

<!-- 需要关联的 hibernate 映射文件 .hbm.xml -->

<mapping resource="com/atguigu/hibernate/entities/Department.hbm.xml"/>

<mapping resource="com/atguigu/hibernate/entities/Employee.hbm.xml"/>

<class-cache usage="read-write" class="com.atguigu.hibernate.entities.Employee"/>

<class-cache usage="read-write" class="com.atguigu.hibernate.entities.Department"/>

<collection-cache usage="read-write" collection="com.atguigu.hibernate.entities.Department.emps"/>

</session-factory>

</hibernate-configuration>