jpa框架与spring框架的整合

1：spring-framework-2.5.4

首先将dist文件夹下的spring.jar复制到WEB-INF/lib目录下面，然后把lib/aspectj文件夹下的aspectjrt.jar和aspectjrtwaver.jar复制到WEB-INF/lib目录下面，然后把cglib目录下的cglib-nodep-2.1_3.jar复制到WEB-INF/lib目录下面，j2ee目录下的common-annotations.jar,jakara-commons目录下的commons-dbcp.jar,commons-pool.jar,commons-logging.jar。至此，需要的spring的jar包就拷贝完了。

2：spring的配置文件beans.xml

beans.xml:

<?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:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
<!-- spring2.5的新特性，扫描机制，通过扫描com.itcast目录下的类文件来创建相应类别的bean实例 -->
<context:component-scan base-package="com.itcast"/>
<!-- 使用数据源和指定persistence.xml位置的方式创建entityManagerFactory,如果使用的不是hibernate JPA实现,
需要在tomcat作一些特殊配置.具体参考手册
注意:使用该方式需要把persistence.xml中的hibernate.connection.driver_class,hibernate.connection.username,hibernate.connection.password,hibernate.connection.url配置删除-->
<context:property-placeholder location="classpath:jdbc.properties"/>
<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${driverClassName}"/>
<property name="url" value="${url}"/>
<property name="username" value="${username}"/>
<property name="password" value="${password}"/>
<property name="initialSize" value="${initialSize}"/>
<property name="maxActive" value="${maxActive}"/>
<property name="maxIdle" value="${maxIdle}"/>
<property name="minIdle" value="${minIdle}"/>
</bean>

<!-- spring容器为jpa生成的管理工厂-->
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="persistenceXmlLocation" value="classpath:META-INF/persistence.xml" />
<property name="loadTimeWeaver">
<bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver"/>
</property>
</bean>

<!--
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
<property name="persistenceUnitName" value="itcast"/>
</bean>
-->
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory"/>
</bean>
<!-- Activates @Transactional for DefaultImageDatabase -->
<!-- 规定事务采用注解的方式来声明 -->

<tx:annotation-driven transaction-manager="transactionManager"/>

</beans>

对应的jdbc.properties:

driverClassName=org.gjt.mm.mysql.Driver
url=jdbc:mysql://localhost:3306/itcast?useUnicode=true&characterEncoding=UTF-8
username=root
password=root
initialSize=1
maxActive=100
maxIdle=8
minIdle=1

对应的persistence.xml:

<?xml version="1.0"?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/persistence http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">
<!-- file:///D:\hibernate\hibernate-entitymanager-3.3.2.CR1\resources\org\hibernate\ejb\persistence_1_0.xsd -->
<persistence-unit name="itcast" transaction-type="RESOURCE_LOCAL">
<provider>org.hibernate.ejb.HibernatePersistence</provider>
<properties>
<property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/>

<property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/itcast?useUnicode=true&amp;characterEncoding=UTF-8"/>
<property name="hibernate.max_fetch_depth" value="3"/>
<property name="hibernate.hbm2ddl.auto" value="update"/>
<property name="hibernate.jdbc.fetch_size" value="18"/>
<property name="hibernate.jdbc.batch_size" value="10"/>
<property name="hibernate.show_sql" value="false"/>
<property name="hibernate.format_sql" value="false"/>
</properties>
</persistence-unit>
</persistence>