jpa+spring配置多数据源
采用jpa+spring技术配置多数据源
persistence.xml配置多数据源
<?
xml version
=
"
1.0
"
?>
<
persistence 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_1_0.xsd
"
version
=
"
1.0
"
>
<!--
配置mysql数据源
-->
<
persistence
-
unit name
=
"
mysql
"
transaction
-
type
=
"
RESOURCE_LOCAL
"
>
<
provider
>
org.hibernate.ejb.HibernatePersistence
</
provider
>
<
properties
>
<
property name
=
"
hibernate.dialect
"
value
=
"
org.hibernate.dialect.MySQL5Dialect
"
/>
<
property name
=
"
hibernate.connection.driver_class
"
value
=
"
org.gjt.mm.mysql.Driver
"
/>
<
property name
=
"
hibernate.connection.username
"
value
=
"
root
"
/>
<
property name
=
"
hibernate.connection.password
"
value
=
"
mysql
"
/>
<
property name
=
"
hibernate.connection.url
"
value
=
"
jdbc:mysql://localhost:3306/test?useUnicode=true&characterEncoding=UTF-8
"
/>
<
property name
=
"
hibernate.hbm2ddl.auto
"
value
=
"
update
"
/>
</
properties
>
</
persistence
-
unit
>
<!--
配置oracle数据源
-->
<
persistence
-
unit name
=
"
oracle
"
transaction
-
type
=
"
RESOURCE_LOCAL
"
>
<
provider
>
org.hibernate.ejb.HibernatePersistence
</
provider
>
<
properties
>
<
property name
=
"
hibernate.dialect
"
value
=
"
org.hibernate.dialect.Oracle10gDialect
"
/>
<
property name
=
"
hibernate.connection.driver_class
"
value
=
"
oracle.jdbc.driver.OracleDriver
"
/>
<
property name
=
"
hibernate.connection.username
"
value
=
"
test
"
/>
<
property name
=
"
hibernate.connection.password
"
value
=
"
test
"
/>
<
property name
=
"
hibernate.connection.url
"
value
=
"
jdbc:oracle:thin:@localhost:1521:orcl
"
/>
<
property name
=
"
hibernate.hbm2ddl.auto
"
value
=
"
update
"
/>
</
properties
>
</
persistence
-
unit
>
</
persistence
>
beans.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:aop
=
"
http://www.springframework.org/schema/aop
"
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-2.5.xsd
http:
//
www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http:
//
www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd
http:
//
www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
">
<
bean id
=
"
entityManagerFactory
"
class
=
"
org.springframework.orm.jpa.LocalEntityManagerFactoryBean
"
>
<
property name
=
"
persistenceUnitName
"
value
=
"
mysql
"
/>
</
bean
>
<
bean id
=
"
entityManagerFactory2
"
class
=
"
org.springframework.orm.jpa.LocalEntityManagerFactoryBean
"
>
<
property name
=
"
persistenceUnitName
"
value
=
"
oracle
"
/>
</
bean
>
<
bean id
=
"
txManager
"
class
=
"
org.springframework.orm.jpa.JpaTransactionManager
"
>
<
property name
=
"
entityManagerFactory
"
ref
=
"
entityManagerFactory
"
/>
</
bean
>
<
tx:annotation
-
driven transaction
-
manager
=
"
txManager
"
/>
</
beans
>
PersonServiceTest测试类
package
junit.test;
import
javax.annotation.Resource;
import
javax.persistence.EntityManager;
import
javax.persistence.EntityManagerFactory;
import
javax.persistence.Persistence;
import
javax.persistence.PersistenceContext;
import
org.junit.Test;
/**
* 测试多数据源配置是否成功
*
*
@author
jiqinlin
*
*/
public
class
PersonServiceTest {
//
@PersistenceContext(unitName="mysql")
//
private EntityManager mysqlEm;
//
@PersistenceContext(unitName="oracle")
//
private EntityManager oracleEm;
@Test
public
void
test() {
EntityManagerFactory mysql
=
Persistence.createEntityManagerFactory(
"
mysql
"
);
EntityManagerFactory oracle
=
Persistence.createEntityManagerFactory(
"
oracle
"
);
System.out.println(mysql
+
"
:
"
+
oracle);
}
}
运行时如果能打印出factory对象，表示多数据源配置成功，如下所示
