Spring + Hibernate + JPA [closed]

Question

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?

Answer 1

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.