spring 整合 jpa

1配置一个数据源

<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>

加载jdbc配置文件的话<context:property-override location="classpath:jdbc.properties"/>

2.配置一个实体管理器

<bean id="myEmf" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
  <property name="persistenceXmlLocations" value="classpath:META-INF/persistence.xml"></property>
  <property name="dataSource" ref="dataSource"/>
  <property name="loadTimeWeaver">
    <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver"/>
  </property>
 </bean>

3配置一个事务管理器

<bean id="myTxManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    <property name="entityManagerFactory" ref="myEmf"/>
  </bean>

4.打开注解管理实务<tx:annotation-driven transaction-manager="myTxManager"/>

如果使用此注解前面的注解打开可以省略

如果不使用注解可以用spring的面向切面配置，详情查看docs

 

整体就是

 

<?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:p="http://www.springframework.org/schema/p"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="
        http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
        http://www.springframework.org/schema/tx
     http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
     http://www.springframework.org/schema/aop
     http://www.springframework.org/schema/aop/spring-aop-3.0.xsd
        http://www.springframework.org/schema/context
        http://www.springframework.org/schema/context/spring-context-3.0.xsd">

    <context:component-scan base-package="com.lee"/>
 <context:property-override 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>
   
 <bean id="myEmf" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
  <property name="persistenceXmlLocations" value="classpath:META-INF/persistence.xml"></property>
  <property name="dataSource" ref="dataSource"/>
  <property name="loadTimeWeaver">
    <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver"/>
  </property>
 </bean>
 <bean id="myTxManager" class="org.springframework.orm.jpa.JpaTransactionManager">
    <property name="entityManagerFactory" ref="myEmf"/>
  </bean>
 <tx:annotation-driven transaction-manager="myTxManager"/>
</beans>