1、首先配置两个数据库
<bean id="dataSourceA" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
<property name="driverClassName" value="${jdbc.driverClassName}" />
<property name="url" value="${jdbc.url}" />
<property name="username" value="${jdbc.username}" />
<property name="password" value="${jdbc.password}" />
<property name="maxActive" value="${jdbc.maxActive}" />
<property name="maxWait" value="${jdbc.maxWait}" />
</bean>
<bean id="dataSourceB" class="org.apache.commons.dbcp.BasicDataSource">
<property name="driverClassName" value="${vjdbc.driverClassName}" />
<property name="url" value="${vjdbc.url}" />
<property name="username" value="${vjdbc.username}" />
<property name="password" value="${vjdbc.password}" />
<property name="maxActive" value="${jdbc.maxActive}" />
<property name="maxWait" value="${jdbc.maxWait}" />
</bean>
2、再配置一个dataSource 管理 key 值和value值对应，默认选择dataSourceA ，其他配置按照正常的spring mvc 配置即可。
<bean id="dataSource" class="com.broadengate.util.DynamicDataSource">
<!-- 通过key-value的形式来关联数据源 -->
<property name="targetDataSources">
<map key-type="java.lang.String">
<entry value-ref="dataSourceA" key="dataSourceA"></entry>
<entry value-ref="dataSourceB" key="dataSourceB"></entry>
</map>
</property>
<property name="defaultTargetDataSource" ref="dataSourceA" >
</property>
</bean>
3、sessionFactory 中使用 dataSource做数据源。
4、新建一个DynamicDataSource类继承AbstractRoutingDataSource。
public class DynamicDataSource extends AbstractRoutingDataSource{
public static final String DATA_SOURCE_A = "dataSourceA";
public static final String DATA_SOURCE_B = "dataSourceB";
private static final ThreadLocal<String> contextHolder = new ThreadLocal<String>();
public static void setCustomerType(String customerType) {
contextHolder.set(customerType);
}
public static String getCustomerType() {
return contextHolder.get();
}
public static void clearCustomerType() {
contextHolder.remove();
}
@Override
protected Object determineCurrentLookupKey() {
return getCustomerType();
}
}
5、切换数据源,这一步必须在进入业务层之前切换。
DynamicDataSource.setCustomerType(DynamicDataSource.DATA_SOURCE_A);
作者：李果
Java spring mvc多数据源配置
http://www.itpub.net/thread-1906608-1-1.html
(出处: ITPUB论坛－中国最专业的IT技术社区)