Spring + Hibernate + JPA [英] Spring + Hibernate + JPA

问题描述

到目前为止，我有一个持久化的Spring应用程序。但是现在我想使用Hibernate和JPA来完成我所有的数据库活动。我想用一个实体管理器来做这件事。

我一直在阅读关于这个问题的许多文档和教程，我一直在困惑我是否需要一个persistence.xml文件。另外，我也一直对如何设置我的applicationContext.xml文件感到困惑。

有人知道使用EntityManager学习Spring + Hibernate + JPA +的好网站吗？

解决方案

我刚刚花了几周的时间尝试设置相同类型的项目。

您需要一个persistence.xml文件，并且它属于META-INF

以下是一个示例我的spring bean文件用于持久化：

 < beans xmlns =http://www.springframework.org/schema/ beans
 xmlns：xsi =http://www.w3.org/2001/XMLSchema-instance
 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 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
 /schema/tx/spring-tx-3.0.xsd 
 http://www.springframework.org/schema/context 
 http://www.springframework.org/schema/context/spring-context -3.0.xsd> 
 
< context：property-placeholder location =/ WEB-INF / config.properties/> 
 
< tx：annotation-driven /> 
 
< bean id =transactionManagerclass =org.springframework.orm.jpa.JpaTransactionManager> 
< property name =entityManagerFactoryref =entityManagerFactory/> 
< / bean> 
 
< bean id =jpaTemplateclass =org.springframework.orm.jpa.JpaTemplate> 
< property name =entityManagerFactoryref =entityManagerFactory/> 
< / bean> 
 
< bean id =dataSourceclass =org.springframework.jdbc.datasource.DriverManagerDataSource> 
< property name =driverClassNamevalue =$ {db.driver}/> 
< property name =urlvalue =$ {db.url}/> 
< property name =usernamevalue =$ {db.user}/> 
< property name =passwordvalue =$ {db.password}/> 
< / bean> 
 
< bean id =entityManagerFactoryclass =org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean> 
< property name =persistenceUnitNamevalue =whatisayis/> 
< property name =dataSourceref =dataSource/> 
< property name =jpaVendorAdapter> 
< bean class =org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter> 
< property name =databasePlatformvalue =org.hibernate.dialect.MySQL5InnoDBDialect/> 
< property name =showSqlvalue =true/> 
< property name =generateDdlvalue =true/> 
< / bean> 
< / property> 
< / bean> 
 
< bean id =leDAOclass =com.noisyair.whatisayis.dao.jpa.JpaLearningEntryDAO> 
< property name =jpaTemplateref =jpaTemplate/> 
< / bean> 
< bean id =sampleDAOclass =com.noisyair.whatisayis.dao.jpa.JpaSampleDAO> 
< property name =jpaTemplateref =jpaTemplate/> 
< / bean> 
< bean id =tagDAOclass =com.noisyair.whatisayis.dao.jpa.JpaTagDAO> 
< property name =jpaTemplateref =jpaTemplate/> 
< / bean> 
< / beans> 
  

另外，我正在使用Maven来拉入我需要的spring3和hibernate依赖项。

编辑：对于学习资源我强烈建议Spring Recipes A Problem-Solution Approach由Gary Mac http://www.apress.com/book/view/9781590599792 。这是我读过的最好的技术书籍之一，它肯定会帮助你启动并运行Spring / JPA / Hibernate。

As of now I have a working Spring application with persistence. However now I want to use Hibernate with JPA to do all of my database activities. I want to do this using an entitymanager.

I've been reading many documents and tutorials on this matter, I've been getting confused on whether I need a persistence.xml file or not. Also I've been getting confused on how to setup my applicationContext.xml file as well.

Does anybody know of a good site to look at in order to learn Spring + Hibernate + JPA + using EntityManager?

解决方案

I've just spent the last couple of weeks trying to set up the same kind of project.

You do need a persistence.xml file, and it belongs in META-INF

Here is an example of my spring beans file for persistence:

<beans  xmlns="http://www.springframework.org/schema/beans" 
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
    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/context 
http://www.springframework.org/schema/context/spring-context-3.0.xsd">

<context:property-placeholder location="/WEB-INF/config.properties" />

    <tx:annotation-driven />

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

<bean id="jpaTemplate" class="org.springframework.orm.jpa.JpaTemplate"> 
    <property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>

<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
    <property name="driverClassName" value="${db.driver}" /> 
    <property name="url" value="${db.url}" /> 
    <property name="username" value="${db.user}" /> 
    <property name="password" value="${db.password}" />
</bean>

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean"> 
    <property name="persistenceUnitName" value="whatisayis" />
    <property name="dataSource" ref="dataSource" />
    <property name="jpaVendorAdapter"> 
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 
            <property name="databasePlatform" value="org.hibernate.dialect.MySQL5InnoDBDialect" /> 
            <property name="showSql" value="true" /> 
            <property name="generateDdl" value="true" />
        </bean> 
    </property>
</bean>

<bean id="leDAO" class="com.noisyair.whatisayis.dao.jpa.JpaLearningEntryDAO">
    <property name="jpaTemplate" ref="jpaTemplate" />
</bean> 
<bean id="sampleDAO" class="com.noisyair.whatisayis.dao.jpa.JpaSampleDAO">
    <property name="jpaTemplate" ref="jpaTemplate" />
</bean>
    <bean id="tagDAO" class="com.noisyair.whatisayis.dao.jpa.JpaTagDAO">
    <property name="jpaTemplate" ref="jpaTemplate" />
</bean>
</beans>

Also, I am using Maven to pull in the spring3 and hibernate dependencies i need.

edit: for a learning resource I highly recommend "Spring Recipes A Problem-Solution Approach" by Gary Mac http://www.apress.com/book/view/9781590599792. This is one of the best technical books I've ever read, and it will surely help you get up and running with Spring/JPA/Hibernate.

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