Hibernate基本配置整理

Hibernate配置说明

hibernate.cfg.xml格式如下: <!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<hibernate-configuration>

<session-factory>

<!--SessionFactory的配置信息-->

<!--mapping的配置信息-->

</session-factory>

</hibernate-configuration>

hibernate.cfg.xml是hibernate用于连接数据库的文件,默认放在class目录下,Configuration需要根据此文件创造SessionFactory

Sessionfactory需要配置的元素属性有:

dialect:连接数据库的方言

connection.url:连接的url connection.

driver_class:连接的数据库驱动

connection.username:数据库登录名

connection.password:数据库登录密码

或者使用JNDI

connection.datasource:datasource名称

Sessionfactory其它的配置元素属性:

transaction.factory_class:指定一个Transaction实例工厂类

show_sql:是否在控制台上显示

SQL format_sql:是否按表准格式输出

SQL default_schema:在生成的SQL中，将给定的

schema/atblespace附加于非全限定名的表上

default_catalog:在生成的SQL中，将给定的

catalog附加于非全限定名的表上

session_factory_name:绑定JNDI的名称

max_fetch_depth:外联结抓取的最大深度

default_entity_mode:批量抓取的最大数量

order_updates:已更新数据主键为基准为SQL排序

generate_statistics:是否收集性能数据

user_identifer_rollback:对象被删除后表示是否被设置为默认值

_sql_comments:在SQL中输出注释信息

连接SQLserver2000的配置: <?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">sa</property>

<property name="connection.password">123</property>

<property name="connection.url"> jdbc:microsoft:sqlserver://localhost:1433 </property>

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

<property name="connection.driver_class"> com.microsoft.jdbc.sqlserver.SQLServerDriver </property>

<!--mapping的配置信息-->

</session-factory>

</hibernate-configuration>

连接MySQL的配置: <?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">root</property>

<property name="connection.password">123</property>

<property name="connection.url"> jdbc:mysql://localhost:3306/db_database </property>

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

<property name="connection.driver_class"> com.mysql.jdbc.Drive </property>

<!--mapping的配置信息-->

</session-factory>

</hibernate-configuration>

连接Oracle的配置: <?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">SYSTEM</property>

<property name="connection.password">123</property>

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

<property name="dialect">org.hibernate.dialect.Oracle9Dialect</property>

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

<!--mapping的配置信息--> </session-factory>

</hibernate-configuration>

连接使用JNDI的配置: <?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"> <!-- Generated by MyEclipse Hibernate Tools. -->

<hibernate-configuration>

<session-factory>

<property name="connection.datasource"> java:comp/env/jdbc/TestDB </property>

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

<property name="myeclipse.connection.profile">JDBC</property>

<!--mapping的配置信息-->

</session-factory>

</hibernate-configuration>

XXX.hbm.xml格式如下: <?xml version="1.0"?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"> <!-- Mapping file autogenerated by MyEclipse - Hibernate Tools -->

<hibernate-mapping>

<class name="classname" table="tablename" schema="dbo" catalog="hibernatExercise">

<!--对象和数据影射的属性-->

</class>

</hibernate-mapping>

映射文件将被配置在hibernate.cfg.xml下mapping中,它将一张表对应一个持久化类

hibernatemapping配置元素属性: class元素的name属性:久化类名称 class元素的table属性:对应表的名称 id子元素:表主键和类属性的映射 property子元素:表字段和类属性的影射 generator子元素:对象表示的生成方式

Java Hibernate SQL数据类型对应关系:

String String varchar()

String text text

int int int

char character char()

boolean boolean bit

byte[] binary blob

Date date date

Timestamp timestamp timestamp

外键关联:

one-to-one 一对一

many-to-one 多对一

one-to-many 一对多

many-to-many 多对多

name 映射属性的名称

cascade 对关联对象的级联操作

lazy 是否进行延迟检索

column 映射为对应表的外键

class 映射的类型

<one-to-one name="right" class="com.bo.Student" cascade="all" lazy="false">

使用Spring配置管理sessionFactory的写法: <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">

<beans>

<bean id = "dataSource" class="org.springframework.jndi.JndiObjectFactoryBean">

<property name="jndiName">

<value>java:comp/env/jdbc/TestDB</value>

</property>

</bean>

<bean id = "sessionFactory" class = "org.springframework.orm.hibernate3.LocalSessionFactoryBean">

<property name="dataSource">

<ref local="dataSource"/>

</property>

<property name="mappingResources">

<list>

<value>

<!--mapping的配置信息-->

</value>

</list>

</property>

<property name="hibernateProperties">

<props>

<prop key="hibernate.dialect"> org.hibernate.dialect.SQLServerDialect </prop>

</props>

</property>

</bean>

<bean id="hibernateTemplate" class="org.springframework.orm.hibernate.HibernateTemplate">

<property name="sessionFactory">

<ref bean="sessionFactory"/>

</property>

</bean>

</beans>

如上所示由spring来管理sessionFactory.