Spring采用properties配置多个数据库

比如在一个项目中有这样的需求:上海和武汉采用不同的系统，每个系统都有自己的数据库，但是在上海的系统需要访问武汉的数据库，这就要在项目中配置两个数据源，下面是我给的SSH采用properties配置数据源的方法。

1.要有两个properties文件

第一个文件是本地数据库文件dataResources.properties

ConnectString=jdbc:mysql://192.168.1.110:3306/tplis?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true
UserID=root
Password=root
JdbcDriverName=com.mysql.jdbc.Driver

第二个文件是武汉数据库文件wuhanDataResources.properties

wuhan.ConnectString=jdbc:mysql://localhost:3306/tplis?useUnicode=true&characterEncoding=utf-8&zeroDateTimeBehavior=convertToNull&transformedBitIsBoolean=true
wuhan.UserID=root
wuhan.Password=root
wuhan.JdbcDriverName=com.mysql.jdbc.Driver

2.配置dataSource

在applicationContext-database.xml文件中

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

<bean id="propertyConfigurer"
    class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
    <property name="locations">
    	<list>
    		<value>/WEB-INF/classes/net/bolue/resources/dataResources.properties</value>
    		<value>/WEB-INF/classes/net/bolue/resources/wuhanDataResources.properties</value>
    	</list>
    </property>
  </bean>

  <bean id="dataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName">
      <value>${JdbcDriverName}</value>
    </property>
    <property name="url">
      <value>${ConnectString}</value>
    </property>
    <property name="username">
      <value>${UserID}</value>
    </property>
    <property name="password">
      <value>${Password}</value>
    </property>
  </bean>

 <bean id="transactionManager"
		class="org.springframework.orm.hibernate3.HibernateTransactionManager">
		<property name="sessionFactory">
			<ref bean="sessionFactory" />
		</property>
	</bean>

	<bean id="txProxyTemplate" abstract="true"
		class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
		<property name="transactionManager">
			<ref bean="transactionManager" />
		</property>
		<property name="transactionAttributes">
			<props>
				<prop key="*">PROPAGATION_REQUIRED</prop>
			</props>
		</property>
	</bean>
	
	<bean id="wuhanDataSource"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName">
      <value>${wuhan.JdbcDriverName}</value>
    </property>
    <property name="url">
      <value>${wuhan.ConnectString}</value>
    </property>
    <property name="username">
      <value>${wuhan.UserID}</value>
    </property>
    <property name="password">
      <value>${wuhan.Password}</value>
    </property>
  </bean>
</beans>

3.配置sessionFactory

<bean id="sessionFactory"
    class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    <property name="dataSource"><ref bean="dataSource" /></property>
    <property name="hibernateProperties">
      <props>
        <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
        <prop key="hibernate.show_sql">true</prop>
      </props>
    </property>
    <property name="mappingResources">
      <list>
        <!-- bu -->
        <value>net/bolue/bu/vo/BlBuDriver.hbm.xml</value>
        <value>net/bolue/basic/vo/BlBasicUser.hbm.xml</value>
      </list>
    </property>
  </bean>

<bean id="wuhanSessionFactory"
    class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
    <property name="dataSource"><ref bean="wuhanDataSource" /></property>
    <property name="hibernateProperties">
      <props>
        <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
        <prop key="hibernate.show_sql">true</prop>
      </props>
    </property>
    <property name="mappingResources">
      <list>
        <!-- bu -->
        <value>net/bolue/bu/vo/BlBuDriver.hbm.xml</value>
        <value>net/bolue/basic/vo/BlBasicUser.hbm.xml</value>
      </list>
    </property>
  </bean>

4.在DAO中注入sessionFactory

<bean id="blBuDriverService" parent="txProxyTemplate">
    <property name="target">
      <bean class="net.bolue.bu.service.impl.BlBuDriverServiceImpl">
        <property name="blBuDriverDAO"><ref bean="blBuDriverDAO" /></property>
        <property name="blBuTransDAO"><ref bean="blBuTransDAO" /></property>
        <property name="wuhanBlBuDriverDAO"><ref bean="wuhanBlBuDriverDAO" /></property>
      </bean>
    </property>
  </bean>

<bean id="blBuCustrelateService" parent="txProxyTemplate">
    <property name="target">
      <bean class="net.bolue.bu.service.impl.BlBuCustrelateServiceImpl">
        <property name="blBuCustrelateDAO"><ref bean="blBuCustrelateDAO" /></property>
      </bean>
    </property>
  </bean>

5.在service中使用两个不同的DAO

private BlBuDriverDAO blBuDriverDAO;
private BlBuDriverDAO wuhanBlBuDriverDAO;