final SqlSession sqlSession = getSqlSession( 
 SqlSessionTemplate.this.sqlSessionFactory, 
 SqlSessionTemplate.this.executorType, 
 SqlSessionTemplate.this.exceptionTranslator); 

public class EjsSqlSessionTemplate extends SqlSessionTemplate { 
 
 private Map<String, SqlSessionFactory> targetSqlSessionFactory = new HashMap<String, SqlSessionFactory>(); 
 public void setTargetSqlSessionFactory(Map<String, SqlSessionFactory> targetSqlSessionFactory) { 
  this.targetSqlSessionFactory = targetSqlSessionFactory; 
 } 

<bean id="sqlSessionTemplate" class="com.ejushang.spider.datasource.EjsSqlSessionTemplate"> 
  <constructor-arg ref="sqlSessionFactory" /> 
  <property name="targetSqlSessionFactory"> 
   <map> 
    <entry value-ref="sqlSessionFactory" key="spider"/> 
    <entry value-ref="sqlSessionFactoryTb" key="sysinfo"/> 
   </map> 
  </property> 
 </bean> 
 <bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 
  <property name="basePackage" value="com.foo.bar.**.mapper*" /> 
  <property name="sqlSessionTemplateBeanName" value="sqlSessionTemplate"/> 
 </bean> 

/** 
  * 重写得到SqlSessionFactory的方法 
  * @return 
  */ 
 @Override 
 public SqlSessionFactory getSqlSessionFactory() { 
 
  SqlSessionFactory targetSqlSessionFactory = this.targetSqlSessionFactory.get(SqlSessionContextHolder.getDataSourceKey()); 
  if (targetSqlSessionFactory != null) { 
   return targetSqlSessionFactory; 
  } else if ( this.getSqlSessionFactory() != null) { 
   return this.getSqlSessionFactory(); 
  } 
  throw new IllegalArgumentException("sqlSessionFactory or targetSqlSessionFactory must set one at least"); 
 } 

public class SqlSessionContextHolder { 
 private static final ThreadLocal<String> contextHolder = new ThreadLocal<String>(); 
 private static Logger logger = LoggerFactory.getLogger(SqlSessionContextHolder.class); 
 public static void setSessionFactoryKey(String dataSourceKey) { 
  contextHolder.set(dataSourceKey); 
 } 
 public static String getDataSourceKey() { 
  String key = contextHolder.get(); 
  logger.info("当前线程Thread:"+Thread.currentThread().getName()+" 当前的数据源 key is "+ key); 
  return key; 
 } 
} 

final SqlSession sqlSession = getSqlSession(    
EjsSqlSessionTemplate.this.getSqlSessionFactory(),    
EjsSqlSessionTemplate.this.getExecutorType(),     
EjsSqlSessionTemplate.this.getPersistenceExceptionTranslator()); 

public SqlSessionTemplate(SqlSessionFactory sqlSessionFactory, ExecutorType executorType, 
 PersistenceExceptionTranslator exceptionTranslator) { 
 notNull(sqlSessionFactory, "Property 'sqlSessionFactory' is required"); 
 notNull(executorType, "Property 'executorType' is required"); 
 this.sqlSessionFactory = sqlSessionFactory; 
 this.executorType = executorType; 
 this.exceptionTranslator = exceptionTranslator; 
 this.sqlSessionProxy = (SqlSession) newProxyInstance( 
  SqlSessionFactory.class.getClassLoader(), 
  new Class[] { SqlSession.class }, 
  new SqlSessionInterceptor()); 
} 

public EjsSqlSessionTemplate(SqlSessionFactory sqlSessionFactory, ExecutorType executorType, PersistenceExceptionTranslator exceptionTranslator) { 
  super(getSqlSessionFactory(), executorType, exceptionTranslator); 
 } 

public class EjsSqlSessionTemplate extends SqlSessionTemplate { 
 private final SqlSessionFactory sqlSessionFactory; 
 private final ExecutorType executorType; 
 private final SqlSession sqlSessionProxy; 
 private final PersistenceExceptionTranslator exceptionTranslator; 
 private Map<Object, SqlSessionFactory> targetSqlSessionFactory; 
 public void setTargetSqlSessionFactory(Map<Object, SqlSessionFactory> targetSqlSessionFactory) { 
  this.targetSqlSessionFactory = targetSqlSessionFactory; 
 } 
 public EjsSqlSessionTemplate(SqlSessionFactory sqlSessionFactory) { 
  this(sqlSessionFactory, sqlSessionFactory.getConfiguration().getDefaultExecutorType()); 
 } 
 public EjsSqlSessionTemplate(SqlSessionFactory sqlSessionFactory, ExecutorType executorType) { 
  this(sqlSessionFactory, executorType, new MyBatisExceptionTranslator(sqlSessionFactory.getConfiguration() 
    .getEnvironment().getDataSource(), true)); 
 } 
 public EjsSqlSessionTemplate(SqlSessionFactory sqlSessionFactory, ExecutorType executorType, 
         PersistenceExceptionTranslator exceptionTranslator) { 
  super(sqlSessionFactory, executorType, exceptionTranslator); 
  this.sqlSessionFactory = sqlSessionFactory; 
  this.executorType = executorType; 
  this.exceptionTranslator = exceptionTranslator; 
  this.sqlSessionProxy = (SqlSession) newProxyInstance( 
    SqlSessionFactory.class.getClassLoader(), 
    new Class[] { SqlSession.class }, 
    new SqlSessionInterceptor()); 
 } 
 @Override 
 public SqlSessionFactory getSqlSessionFactory() { 
  SqlSessionFactory targetSqlSessionFactory = this.targetSqlSessionFactory.get(SqlSessionContextHolder.getDataSourceKey()); 
  if (targetSqlSessionFactory != null) { 
   return targetSqlSessionFactory; 
  } else if ( this.sqlSessionFactory != null) { 
   return this.sqlSessionFactory; 
  } 
  throw new IllegalArgumentException("sqlSessionFactory or targetSqlSessionFactory must set one at least"); 
 } 
 @Override 
 public Configuration getConfiguration() { 
  return this.getSqlSessionFactory().getConfiguration(); 
 } 
 public ExecutorType getExecutorType() { 
  return this.executorType; 
 } 
 public PersistenceExceptionTranslator getPersistenceExceptionTranslator() { 
  return this.exceptionTranslator; 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public <T> T selectOne(String statement) { 
  return this.sqlSessionProxy.<T> selectOne(statement); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public <T> T selectOne(String statement, Object parameter) { 
  return this.sqlSessionProxy.<T> selectOne(statement, parameter); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public <K, V> Map<K, V> selectMap(String statement, String mapKey) { 
  return this.sqlSessionProxy.<K, V> selectMap(statement, mapKey); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public <K, V> Map<K, V> selectMap(String statement, Object parameter, String mapKey) { 
  return this.sqlSessionProxy.<K, V> selectMap(statement, parameter, mapKey); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public <K, V> Map<K, V> selectMap(String statement, Object parameter, String mapKey, RowBounds rowBounds) { 
  return this.sqlSessionProxy.<K, V> selectMap(statement, parameter, mapKey, rowBounds); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public <E> List<E> selectList(String statement) { 
  return this.sqlSessionProxy.<E> selectList(statement); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public <E> List<E> selectList(String statement, Object parameter) { 
  return this.sqlSessionProxy.<E> selectList(statement, parameter); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public <E> List<E> selectList(String statement, Object parameter, RowBounds rowBounds) { 
  return this.sqlSessionProxy.<E> selectList(statement, parameter, rowBounds); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public void select(String statement, ResultHandler handler) { 
  this.sqlSessionProxy.select(statement, handler); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public void select(String statement, Object parameter, ResultHandler handler) { 
  this.sqlSessionProxy.select(statement, parameter, handler); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public void select(String statement, Object parameter, RowBounds rowBounds, ResultHandler handler) { 
  this.sqlSessionProxy.select(statement, parameter, rowBounds, handler); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public int insert(String statement) { 
  return this.sqlSessionProxy.insert(statement); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public int insert(String statement, Object parameter) { 
  return this.sqlSessionProxy.insert(statement, parameter); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public int update(String statement) { 
  return this.sqlSessionProxy.update(statement); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public int update(String statement, Object parameter) { 
  return this.sqlSessionProxy.update(statement, parameter); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public int delete(String statement) { 
  return this.sqlSessionProxy.delete(statement); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public int delete(String statement, Object parameter) { 
  return this.sqlSessionProxy.delete(statement, parameter); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public <T> T getMapper(Class<T> type) { 
  return getConfiguration().getMapper(type, this); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public void commit() { 
  throw new UnsupportedOperationException("Manual commit is not allowed over a Spring managed SqlSession"); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public void commit(boolean force) { 
  throw new UnsupportedOperationException("Manual commit is not allowed over a Spring managed SqlSession"); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public void rollback() { 
  throw new UnsupportedOperationException("Manual rollback is not allowed over a Spring managed SqlSession"); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public void rollback(boolean force) { 
  throw new UnsupportedOperationException("Manual rollback is not allowed over a Spring managed SqlSession"); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public void close() { 
  throw new UnsupportedOperationException("Manual close is not allowed over a Spring managed SqlSession"); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public void clearCache() { 
  this.sqlSessionProxy.clearCache(); 
 } 
 /** 
  * {@inheritDoc} 
  */ 
 public Connection getConnection() { 
  return this.sqlSessionProxy.getConnection(); 
 } 
 /** 
  * {@inheritDoc} 
  * @since 1.0.2 
  */ 
 public List<BatchResult> flushStatements() { 
  return this.sqlSessionProxy.flushStatements(); 
 } 
 /** 
  * Proxy needed to route MyBatis method calls to the proper SqlSession got from Spring's Transaction Manager It also 
  * unwraps exceptions thrown by {@code Method#invoke(Object, Object...)} to pass a {@code PersistenceException} to 
  * the {@code PersistenceExceptionTranslator}. 
  */ 
 private class SqlSessionInterceptor implements InvocationHandler { 
  public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { 
   final SqlSession sqlSession = getSqlSession( 
     EjsSqlSessionTemplate.this.getSqlSessionFactory(), 
     EjsSqlSessionTemplate.this.executorType, 
     EjsSqlSessionTemplate.this.exceptionTranslator); 
   try { 
    Object result = method.invoke(sqlSession, args); 
    if (!isSqlSessionTransactional(sqlSession, EjsSqlSessionTemplate.this.getSqlSessionFactory())) { 
     // force commit even on non-dirty sessions because some databases require 
     // a commit/rollback before calling close() 
     sqlSession.commit(true); 
    } 
    return result; 
   } catch (Throwable t) { 
    Throwable unwrapped = unwrapThrowable(t); 
    if (EjsSqlSessionTemplate.this.exceptionTranslator != null && unwrapped instanceof PersistenceException) { 
     Throwable translated = EjsSqlSessionTemplate.this.exceptionTranslator 
       .translateExceptionIfPossible((PersistenceException) unwrapped); 
     if (translated != null) { 
      unwrapped = translated; 
     } 
    } 
    throw unwrapped; 
   } finally { 
    closeSqlSession(sqlSession, EjsSqlSessionTemplate.this.getSqlSessionFactory()); 
   } 
  } 
 } 
} 

/** 
 * 注解式数据源，用来进行数据源切换 
 * User:Amos.zhou 
 * Date: 14-2-27 
 * Time: 下午2:34 
 */ 
@Target({ElementType.METHOD, ElementType.TYPE}) 
@Retention(RetentionPolicy.RUNTIME) 
@Documented 
public @interface ChooseDataSource { 
 String value() default ""; 
} 

/** 
 * <li>类描述：完成数据源的切换，抽类切面，具体项目继承一下，不需要重写即可使用</li> 
 * 
 * @author： amos.zhou 
 * 2013-8-1 上午11:51:40 
 * @since v1.0 
 */ 
@Aspect 
public abstract class ChooseDataSourceAspect { 
 protected static final ThreadLocal<String> preDatasourceHolder = new ThreadLocal<String>(); 
 @Pointcut("execution(public * *.*(..))") 
 public void allMethodPoint() { 
 } 
 @Pointcut("@within(com.ejushang.spider.annotation.ChooseDataSource) && allMethodPoint()") 
 public void allServiceMethod() { 
 } 
 /** 
  * 对所有注解有ChooseDataSource的类进行拦截 
  */ 
 @Pointcut("cflow(allServiceMethod()) && allServiceMethod()") 
 public void changeDatasourcePoint() { 
 } 
 /** 
  * 根据@ChooseDataSource的属性值设置不同的dataSourceKey,以供DynamicDataSource 
  */ 
 @Before("changeDatasourcePoint()") 
 public void changeDataSourceBeforeMethodExecution(JoinPoint jp) { 
  //拿到anotation中配置的数据源 
  String resultDS = determineDatasource(jp); 
  //没有配置实用默认数据源 
  if (resultDS == null) { 
   SqlSessionContextHolder.setSessionFactoryKey(null); 
   return; 
  } 
  preDatasourceHolder.set(SqlSessionContextHolder.getDataSourceKey()); 
  //将数据源设置到数据源持有者 
  SqlSessionContextHolder.setSessionFactoryKey(resultDS); 
 } 
 /** 
  * <p>创建时间： 2013-8-20 上午9:48:44</p> 
  * 如果需要修改获取数据源的逻辑，请重写此方法 
  * 
  * @param jp 
  * @return 
  */ 
 @SuppressWarnings("rawtypes") 
 protected String determineDatasource(JoinPoint jp) { 
  String methodName = jp.getSignature().getName(); 
  Class targetClass = jp.getSignature().getDeclaringType(); 
  String dataSourceForTargetClass = resolveDataSourceFromClass(targetClass); 
  String dataSourceForTargetMethod = resolveDataSourceFromMethod( 
    targetClass, methodName); 
  String resultDS = determinateDataSource(dataSourceForTargetClass, 
    dataSourceForTargetMethod); 
  return resultDS; 
 } 
 /** 
  * 方法执行完毕以后，数据源切换回之前的数据源。 
  * 比如foo()方法里面调用bar()，但是bar()另外一个数据源， 
  * bar()执行时，切换到自己数据源，执行完以后，要切换到foo()所需要的数据源，以供 
  * foo()继续执行。 
  * <p>创建时间： 2013-8-16 下午4:27:06</p> 
  */ 
 @After("changeDatasourcePoint()") 
 public void restoreDataSourceAfterMethodExecution() { 
  SqlSessionContextHolder.setSessionFactoryKey(preDatasourceHolder.get()); 
  preDatasourceHolder.remove(); 
 } 
 /** 
  * <li>创建时间： 2013-6-17 下午5:34:13</li> <li>创建人：amos.zhou</li> <li>方法描述 :</li> 
  * 
  * @param targetClass 
  * @param methodName 
  * @return 
  */ 
 @SuppressWarnings("rawtypes") 
 private String resolveDataSourceFromMethod(Class targetClass, 
            String methodName) { 
  Method m = ReflectUtil.findUniqueMethod(targetClass, methodName); 
  if (m != null) { 
   ChooseDataSource choDs = m.getAnnotation(ChooseDataSource.class); 
   return resolveDataSourcename(choDs); 
  } 
  return null; 
 } 
 /** 
  * <li>创建时间： 2013-6-17 下午5:06:02</li> 
  * <li>创建人：amos.zhou</li> 
  * <li>方法描述 : 确定 
  * 最终数据源，如果方法上设置有数据源，则以方法上的为准，如果方法上没有设置，则以类上的为准，如果类上没有设置，则使用默认数据源</li> 
  * 
  * @param classDS 
  * @param methodDS 
  * @return 
  */ 
 private String determinateDataSource(String classDS, String methodDS) { 
//  if (null == classDS && null == methodDS) { 
//   return null; 
//  } 
  // 两者必有一个不为null,如果两者都为Null，也会返回Null 
  return methodDS == null ? classDS : methodDS; 
 } 
 /** 
  * <li>创建时间： 2013-6-17 下午4:33:03</li> <li>创建人：amos.zhou</li> <li>方法描述 : 类级别的 @ChooseDataSource 
  * 的解析</li> 
  * 
  * @param targetClass 
  * @return 
  */ 
 @SuppressWarnings({"unchecked", "rawtypes"}) 
 private String resolveDataSourceFromClass(Class targetClass) { 
  ChooseDataSource classAnnotation = (ChooseDataSource) targetClass 
    .getAnnotation(ChooseDataSource.class); 
  // 直接为整个类进行设置 
  return null != classAnnotation ? resolveDataSourcename(classAnnotation) 
    : null; 
 } 
 /** 
  * <li>创建时间： 2013-6-17 下午4:31:42</li> <li>创建人：amos.zhou</li> <li>方法描述 : 
  * 组装DataSource的名字</li> 
  * 
  * @param ds 
  * @return 
  */ 
 private String resolveDataSourcename(ChooseDataSource ds) { 
  return ds == null ? null : ds.value(); 
 } 
} 

@Aspect 
public class OrderFetchAspect extends ChooseDataSourceAspect { 
}

<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> 
</bean> 
<bean id="dataSourceTb" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close"> 
</bean> 
<!--　事务管理 --> 
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> 
 <property name="dataSource" ref="dataSource" /> 
</bean> 
<!-- 注解控制事务 --> 
<tx:annotation-driven transaction-manager="transactionManager"/> 
<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean"> 
 <property name="dataSource" ref="dataSource"/> 
 <property name="configLocation" value="classpath:mybatis.xml" /> 
 <property name="mapperLocations" value="classpath*:com/foo/bar/**/config/*mapper.xml" /> 
</bean> 
<bean id="sqlSessionFactoryTb" class="org.mybatis.spring.SqlSessionFactoryBean"> 
 <property name="dataSource" ref="dataSourceTb"/> 
 <property name="configLocation" value="classpath:mybatis.xml" /> 
 <property name="mapperLocations" value="classpath*:<span style="font-family: Arial, Helvetica, sans-serif;">com/foo/bar</span><span style="font-family: Arial, Helvetica, sans-serif;">/**/configtb/*mapper.xml" /></span> 
</bean> 
<bean id="sqlSessionTemplate" class="com.foo.bar.template.EjsSqlSessionTemplate"> 
 <constructor-arg ref="sqlSessionFactory" /> 
 <property name="targetSqlSessionFactory"> 
  <map> 
   <entry value-ref="sqlSessionFactory" key="spider"/> 
   <entry value-ref="sqlSessionFactoryTb" key="sysinfo"/> 
  </map> 
 </property> 
</bean> 
<bean id="mapperScannerConfigurer" class="org.mybatis.spring.mapper.MapperScannerConfigurer"> 
 <property name="basePackage" value="com.foo.bar.**.mapper*" /> 
 <property name="sqlSessionTemplateBeanName" value="sqlSessionTemplate"/> 
</bean> 

@ChooseDataSource("spider") 
public class ShopServiceTest extends ErpTest { 
 private static final Logger log = LoggerFactory.getLogger(ShopServiceTest.class); 
 @Autowired 
 private IShopService shopService; 
 @Autowired 
 private IJdpTbTradeService jdpTbTradeService; 
 @Test 
 @Rollback(false) 
 public void testFindAllShop(){ 
  List<Shop> shopList1 = shopService.findAllShop(); 
  for(Shop shop : shopList1){ 
   System.out.println(shop); 
  } 
  fromTestDB(); 
 } 
 @ChooseDataSource("sysinfo") 
 private void fromTestDB(){ 
  List<Shop> shopList = jdpTbTradeService.findAllShop(); 
  for(Shop shop : shopList){ 
   System.out.println(shop); 
  } 
 } 
} 

final SqlSession sqlSession = getSqlSession( 
   SqlSessionTemplate.this.sqlSessionFactory, 
   SqlSessionTemplate.this.executorType, 
   SqlSessionTemplate.this.exceptionTranslator); 

final SqlSession sqlSession = getSqlSession( 
     EjsSqlSessionTemplate.this.getSqlSessionFactory(), 
     EjsSqlSessionTemplate.this.executorType,     
   EjsSqlSessionTemplate.this.exceptionTranslator); 

private Map<Object, SqlSessionFactory> targetSqlSessionFactory; 
 public void setTargetSqlSessionFactory(Map<Object, SqlSessionFactory> targetSqlSessionFactory) { 
  this.targetSqlSessionFactory = targetSqlSessionFactory; 
 }