Hibernate dialect issue with Spring configuration

hibernate, java, jpa, mysql, spring

Solution

Not sure why it won't work with your configuration. Maybe something goes wrong with using the p: annotation. I'll post my code (which works for my config) to try if it will fix your code! :)

<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
    <property name="dataSource" ref="dataSource"/>
    <property name="jpaVendorAdapter">
        <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter">
            <property name="showSql" value="false"/>
            <property name="generateDdl" value="true"/>
            <property name="databasePlatform" value="org.hibernate.dialect.MySQL5Dialect"/>
        </bean>
    </property>
</bean>

Good luck!

Problem

I use Hibernate (through JPA) configured by Spring and when I launch my application (war deployed on Tomcat 6), I get this error: ``` org.hibernate.HibernateException: Connection cannot be null when 'hibernate.dialect' not set ``` It seems strange because I've set the hibernate dialect as follows: ``` p:databasePlatform="org.hibernate.dialect.MySQL5Dialect ``` For more information, here my full applicationContext.xml: ``` <?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:context="http://www.springframework.org/schema/context" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.1.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd"> <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource" p:driverClassName="com.mysql.jdbc.Driver" p:url="jdbc:mysql://localhost/room_management" p:username="root" p:password=""/> <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean" p:dataSource-ref="dataSource" p:persistenceUnitName="RoomManagement"> <property name="jpaVendorAdapter"> <bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter" p:database="MYSQL" p:databasePlatform="org.hibernate.dialect.MySQL5Dialect" p:showSql="true"/> </property> </bean> <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager" p:entityManagerFactory-ref="entityManagerFactory"/> <context:annotation-config/> <context:component-scan base-package="com.parisdescartes.roommanagement.*"/> <tx:annotation-driven/> </beans> ``` So, I decided to precise Hibernate Dialect within META-INF/persistence.xml file, and this time that works. Here how I precised it: ``` <properties> <property name="hibernate.dialect" value="org.hibernate.dialect.MySQL5Dialect"/> </properties> ``` Do you have an idea why Hibernate Dialect is not set using Spring configuration ?

Original source