Spring整合Hibernate配置(使用hibernate.cfg.xml文件)

本文主要记录spring整合hibernate的时候，直接使用hibernate.cfg.xml文件注入SessionFactory，applicationContext.xml文件配置如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	   xmlns:aop="http://www.springframework.org/schema/aop"
	   xsi:schemaLocation="
http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

   <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
   	<property name="configLocations">
   		<value>classpath:hibernate.cfg.xml</value>
   	</property>
  </bean>
	
  <bean id="userDao" class="com.dao.impl.UserDaoImpl" >
  	<property name="sessionFactory" ref="sessionFactory"></property>
  </bean>
  
  <bean id="userService" class="com.service.UserService" >
  	<property name="userDao" ref="userDao"></property>
  </bean>
  
</beans>

hibernate.cfg.xml配置文件如下：

<?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>

        <!-- Database connection settings -->
        <property name="connection.driver_class">com.mysql.jdbc.Driver</property>
        <property name="connection.url">jdbc:mysql://localhost:3306/hibernate</property>
        <property name="connection.username">root</property>
        <property name="connection.password">***</property>

        <!-- JDBC connection pool (use the built-in) -->
        <property name="connection.pool_size">10</property>

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

        <!-- Enable Hibernate's automatic session context management -->
        <property name="current_session_context_class">thread</property>

        <!-- Disable the second-level cache  -->
        <property name="cache.provider_class">org.hibernate.cache.NoCacheProvider</property>

        <!-- Echo all executed SQL to stdout -->
        <property name="show_sql">true</property>
        <property name="format_sql">true</property>

        <!-- Drop and re-create the database schema on startup -->
        <property name="hbm2ddl.auto">update</property>

        <mapping resource="com/model/User.hbm.xml"/>
<!--        <mapping class="com.model.User"/>-->

    </session-factory>

</hibernate-configuration>

由于hibernate.cfg.xml文件和applicationContext文件独立开来了，这样更便于hibernate自己独立配置管理，而spring所起的作用只是注入SessionFactory，这样思路更明确，而不是在applicationContext.xml中既要配置Datasource,又要配置SessionFactory,很麻烦，分工明确思路清晰

配置的核心就是：

 <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
   	<property name="configLocations">
   		<value>classpath:hibernate.cfg.xml</value>
   	</property>
  </bean>