１.使用Spring的配置文件完成多数据库连接：

　1.1 applicationContext.xml [spring核心配置文件]

<?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-3.0.xsd">
  
  	<!-- 知识管理数据库 -->
	<bean id="km_source" class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"></property>
		<property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=docmanager"></property>
		<property name="username" value="sa"></property>
		<property name="password" value="123"></property>
	</bean>
	
	<!-- 框架数据库 --> 
	<bean id="ma_source" class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"></property>
		<property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=framemanager"></property>
		<property name="username" value="sa"></property>
		<property name="password" value="123"></property>
		<property name="maxActive" value="100000"></property>  
        <property name="maxIdle" value="20"></property>  
        <property name="maxWait" value="1000"></property>  
	</bean>
	  
	<!-- 用户组织数据库 -->
	<bean id="um_source" class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"></property>
		<property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=usermanager"></property>
		<property name="username" value="sa"></property>
		<property name="password" value="123"></property>
	</bean>
	 
	 <!-- 工作流数据库 -->
	<bean id="wfe_source" class="org.apache.commons.dbcp.BasicDataSource">
		<property name="driverClassName" value="com.microsoft.sqlserver.jdbc.SQLServerDriver"></property>
		<property name="url" value="jdbc:sqlserver://localhost:1433;databaseName=wfemanager"></property>
		<property name="username" value="sa"></property>
		<property name="password" value="123"></property>
	</bean>
	  
	<bean id="myDataSource" class="com.smartcom.util.jdbcUtil.DynamicDataSource">
          <property name="targetDataSources">
             <map> 
             	<entry key="ma_source" value-ref="ma_source"/> 
               	<entry key="um_source" value-ref="um_source"/> 
              </map>
          </property>
          <property name="defaultTargetDataSource" ref="km_source"/>
   </bean>

	<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" abstract="false" lazy-init="false" autowire="default">
        <property name="dataSource" ref="myDataSource"/>
    </bean> 
         
  	<import resource="config/ma/beans_pojo.xml"/>
	<import resource="config/ma/beans_dao.xml"/>
	<import resource="config/ma/beans_service.xml"/>
	<import resource="config/ma/beans_action.xml"/>
	<import resource="config/ma/beans_ajax.xml"/> 
	
</beans>

?

　１.２　JdbcContext.java [建立一个获得和设置上下文的类]

package com.smartcom.util.jdbcUtil;
/**
 * 建立一个获得和设置上下文的类
 * @author Liyongbin
 * 此类正在使用
 */
public class JdbcContext {
	
       private static final ThreadLocal<String> contextHolder =  new ThreadLocal<String>();
		
       /**
		 * XXXXX
		 */
		public static void setJdbcType(String jdbcType) { 
			contextHolder.set(jdbcType); 
		} 
		
		/**
		 * XXXXX
		 */ 
		public static String getJdbcType()