1 <bean id="parentDataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">  
 2     </bean>  
 3       
 4     <bean id="mySqlDataSource" parent="parentDataSource">  
 5         <property name="driverClassName" value="com.mysql.jdbc.Driver"></property>  
 6         <property name="url" value="jdbc:mysql://localhost:3306/test"></property>  
 7         <property name="username" value="root"></property>  
 8         <property name="password" value="root"></property>  
 9     </bean>  
10       
11     <bean id="oracleDataSource" parent="parentDataSource">  
12         <property name="driverClassName" value="oracle.jdbc.driver.OracleDriver"></property>  
13         <property name="url" value="jdbc:oracle:thin:@10.16.17.40:1531:addb"></property>  
14         <property name="username" value="trac"></property>  
15         <property name="password" value="trac"></property>  
16     </bean>  
17       
18     <bean id="dataSource" class="com.trac.dao.datasource.DataSources">  
19         <property name="targetDataSources">  
20             <map key-type="java.lang.String">  
21                 <entry value-ref="mySqlDataSource" key="MYSQL"></entry>  
22                 <entry value-ref="oracleDataSource" key="ORACLE"></entry>  
23             </map>  
24         </property>  
25         <property name="defaultTargetDataSource" ref="oracleDataSource"></property>  
26     </bean>  
27   
28     <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  
29         <property name="dataSource" ref="dataSource" />  
30     </bean>  
31   
32     <!-- 创建SqlSessionFactory，同时指定数据源和mapper -->  
33     <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  
34         <property name="dataSource" ref="dataSource" />  
35         <property name="mapperLocations" value="classpath*:com/trac/ibatis/dbcp/*.xml" />  
36     </bean>  
37   
38     <bean id="sqlSession" class="org.mybatis.spring.SqlSessionTemplate">  
39         <constructor-arg index="0" ref="sqlSessionFactory" />  
40     </bean>  
41   
42     <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  
43         <property name="basePackage" value="com.trac.dao" />  
44     </bean>  

1 public class DataSourceInstances{  
2     public static final String MYSQL="MYSQL";  
3     public static final String ORACLE="ORACLE";  
4 }  

 1 import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;  
 2   
 3 public class DataSources extends AbstractRoutingDataSource{  
 4   
 5     @Override  
 6     protected Object determineCurrentLookupKey() {  
 7         return DataSourceSwitch.getDataSourceType();  
 8     }  
 9   
10 }  

public class DataSourceSwitch{  
    private static final ThreadLocal contextHolder=new ThreadLocal();  
      
    public static void setDataSourceType(String dataSourceType){  
        contextHolder.set(dataSourceType);  
    }  
      
    public static String getDataSourceType(){  
        return (String) contextHolder.get();  
    }  
      
    public static void clearDataSourceType(){  
        contextHolder.remove();  
    }  
}