Java 整合JPA和SpringIOc

嗨，我写了一个小应用程序，正在尝试连接jpa。 在我的spring配置文件中，我写了以下内容：

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

<bean id="entityManagerFactory"
    class="org.springframework.orm.jpa.LocalEntityManagerFactoryBean">
    <property name="dataSource">
        <ref bean="dataSource" />
    </property>
    <property name="packagesToScan">
        <list>
            <value>com.epam.newsmanagement.entity</value>
        </list>
    </property>
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
            <property name="database" value="ORACLE" />
        </bean>
    </property>
</bean>

<bean id="jpaDao" class="com.epam.newsmanagement.dao.JPANewsDao" />

---

请帮助）

org.springframework.orm.jpa.LocalEntityManagerFactoryBean未定义dataSource/getDataSource（）字段/方法。这就是为什么你会得到这个例外

改用LocalContainerEntityManagerFactoryBean

---

如果您在

LocalContainerEntityManagerFactoryBean

中配置

PersistenceUnit

，可能有助于集成

JPA

和

Spring

。确保在

persistence.xml

和

springbean.xml

中使用相同名称的

PersistenceUnit

。如果是这样，

DataSource

本地EntityManagerFactoryBean的配置可能是可选的。您可能需要配置

JpaTransactionManager

（假设：

jpa configuration.xml

可能是Springbean配置。）

可选：

org.springframework.orm.jpa.vendor.hibernatejpailect

或

com.company.util.hibernateextendedjpailect

用于

jpailect

示例：spring-bean.xml

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

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

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <!--<property name="dataSource" ref="dataSource"/>-->
    <property name="persistenceUnitName" value="your_persistence_unit_name"/>
    <property name="jpaVendorAdapter" ref="jpaVendorAdapter"/>
    <property name="jpaDialect">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect"/>
    </property>
    <!--<property name="jpaPropertyMap"></property>-->
    <property name="loadTimeWeaver">
        <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver">
        </bean>
    </property>
</bean>

<bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
    <!-- For MySQL-->
    <property name="databasePlatform" value="org.hibernate.dialect.MySQL5Dialect"/>
    <property name="generateDdl" value="false"/>
    <property name="showSql" value="true"/>
</bean>

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

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

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <!--<property name="dataSource" ref="dataSource"/>-->
    <property name="persistenceUnitName" value="your_persistence_unit_name"/>
    <property name="jpaVendorAdapter" ref="jpaVendorAdapter"/>
    <property name="jpaDialect">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaDialect"/>
    </property>
    <!--<property name="jpaPropertyMap"></property>-->
    <property name="loadTimeWeaver">
        <bean class="org.springframework.instrument.classloading.InstrumentationLoadTimeWeaver">
        </bean>
    </property>
</bean>

<bean id="jpaVendorAdapter" class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
    <!-- For MySQL-->
    <property name="databasePlatform" value="org.hibernate.dialect.MySQL5Dialect"/>
    <property name="generateDdl" value="false"/>
    <property name="showSql" value="true"/>
</bean>