我想使用以下库连接到我的MySQL数据库:
这是我的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: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.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd">
<context:component-scan base-package="dao,service" />
<!-- Configuration du transaction manager -->
<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="entity" />
<property name="jpaVendorAdapter">
<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"/>
</property>
<property name="jpaProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">validate</prop>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="current_session_context_class">thread</prop>
<prop key="hibernate.cache.provider_class">org.hibernate.cache.internal.NoCacheProvider</prop>
<!-- used for debug -->
<prop key="hibernate.show_sql">true</prop>
<!-- EhCache -->
<prop key="hibernate.cache.provider_configuration_file_resource_path">classpath:ehcache.xml</prop>
<prop key="hibernate.cache.region.factory_class">org.hibernate.cache.ehcache.EhCacheRegionFactory</prop>
<prop key="hibernate.cache.provider_class">org.hibernate.cache.SingletonEhCacheProvider</prop>
<prop key="hibernate.cache.use_second_level_cache">true</prop>
<prop key="hibernate.cache.use_query_cache">true</prop>
<prop key="hibernate.generate_statistics">true</prop>
<!-- configuration pool via c3p0, see https://community.jboss.org/wiki/HowToConfigureTheC3P0ConnectionPool -->
<prop key="hibernate.connection.provider_class">org.hibernate.service.jdbc.connections.internal.C3P0ConnectionProvider</prop>
<prop key="hibernate.c3p0.acquire_increment">1</prop> <prop key="hibernate.c3p0.max_size">5</prop>
<prop key="hibernate.c3p0.max_statements">100</prop> <prop key="hibernate.c3p0.min_size">1</prop>
<prop key="hibernate.c3p0.timeout">100</prop> <prop key="hibernate.checkoutTimeout">1000</prop>
<prop key="hibernate.c3p0.idleConnectionTestPeriod">30</prop> <prop key="hibernate.c3p0.preferredTestQuery">SELECT 1
</prop>
</props>
</property>
</bean>
<!-- Configuration de la BDD -->
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="com.mysql.jdbc.Driver" />
<property name="url" value="jdbc:mysql://localhost:3306/mydb?autoReconnect=true" />
<property name="username" value="user" />
<property name="password" value="password" />
</bean>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<property name="entityManagerFactory" ref="entityManagerFactory" />
</bean>
<tx:annotation-driven />
<bean class="org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor" />
</beans>
我没有收到任何错误,但我不确定c3p0和ehCache是否有效:/
答案 0 :(得分:1)
有点晚了,但无论如何。
您的XML中的一个错误是您尝试在hibernate.c3p0
bean中配置数据源和entityManagerFactory
。当你这样做时,hibernate不会考虑任何hibernate.c3p0
属性(因为在这种情况下它不会实例化DataSource
)。
因此,如果您将datasource设置为EntityManagerFactory(或SessionFactory),您应该考虑在数据源端配置连接池,如下所示(C3P0):
<bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver" />
<property name="jdbcUrl" value="jdbc:mysql://localhost:3306/mydb?autoReconnect=true" />
<property name="user" value="user" />
<property name="password" value="password" />
<property name="maxPoolSize" value="2"/>
<property name="minPoolSize" value="1"/>
<property name="idleConnectionTestPeriod" value="3000"/>
</bean>
或您喜欢的任何其他方式。
这种行为在Spring文档中几乎没有记录,这里是what I have found。
对于ComboPooledDataSource,请参阅c3p0 documentation
与hibernate缓存相关,它应该正常工作。