java 中 springmvc + openjpa 配置注解

最新推荐文章于 2024-09-02 10:06:50 发布

mayunshui

最新推荐文章于 2024-09-02 10:06:50 发布

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文章标签： java bean class sqlserver jpa dao

本文链接：https://blog.youkuaiyun.com/mayunshui/article/details/8054699

本文详细介绍了如何在Spring MVC项目中整合JPA，并使用OpenJPA作为持久层解决方案。包括配置persistence.xml和Spring配置文件，以及解决将DAO和服务层打包为独立JAR的问题。

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前提： openjpa 包,spring 3.0以上 java6

jpa：在ecplise 中创建 jpa 项目，配置persistence.xml 如下:

<?xml version="1.0" encoding="UTF-8"?>
<persistence version="2.0" 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_2_0.xsd">
<persistence-unit name="bankJpa" transaction-type="RESOURCE_LOCAL">

<provider>org.apache.openjpa.persistence.PersistenceProviderImpl</provider>

<class>model.City</class>
<properties>

<property name="openjpa.ClassLoadEnhancement" value="true" />
<property name="openjpa.DynamicEnhancementAgent" value="true" />
<property name="openjpa.RuntimeUnenhancedClasses" value="supported" />
</properties>
</persistence-unit>
</persistence>

注意在发布后，这个jpa项目中不要含有 persistence.xml ,这个文件要放到 web 项目的 WEB-INF\classes\meta-info\persistence.xml 下面，不然会出现错误

2 springmvc 中配置，

<?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:tx="http://www.springframework.org/schema/tx"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:mvc="http://www.springframework.org/schema/mvc"
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
http://www.springframework.org/schema/mvc
http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd">



<context:component-scan base-package="com.notes.face" />
<context:component-scan base-package="com.notes.services" />
<context:component-scan base-package="com.notes.control" ></context:component-scan>


<mvc:annotation-driven />

<bean class="org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter" />

<bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="viewClass">
<value>org.springframework.web.servlet.view.InternalResourceView</value>
</property>
</bean>





<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" >
<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"/>
<property name="url" value="jdbc:sqlserver://10.94.3.200:1433;databaseName=Tree"/>
<property name="username" value="sa"/>
<property name="password" value="Foxconn99"/>
</bean>

<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor"/>
<bean class="org.springframework.aop.framework.autoproxy.DefaultAdvisorAutoProxyCreator"/>




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

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.OpenJpaVendorAdapter">

<property name="showSql" value="true"/>
<property name="generateDdl" value="true"/>

<property name="databasePlatform" value="org.apache.openjpa.jdbc.sql.SQLServerDictionary"/>


</bean>
</property>

<property name="loadTimeWeaver">
<bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver"/>

</property>
</bean>

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

</bean>




</beans>