<bean id="configReader" class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer">  <property name="locations">   <list>    <value>classpath:spring/db.properties</value>   </list>  </property>  <property name="ignoreResourceNotFound" value="true"/> </bean> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">  <property name="driverClass" value="${jdbc.oracle.DriverClassName}"></property>  <property name="jdbcUrl" value="${jdbc.oracle.Url}"></property>  <property name="user" value="${jdbc.oracle.UserName}"></property>  <property name="password" value="${jdbc.oracle.UserPassword}"></property>  <property name="acquireIncrement" value="5"></property>  <property name="initialPoolSize" value="5"></property>  <property name="maxIdleTime" value="60"></property>  <property name="maxPoolSize" value="100"></property>  <property name="minPoolSize" value="5"></property> </bean> <!-- 配置數據源:MySQL start --> <bean name="mySqlDataSource" class="com.alibaba.druid.pool.DruidDataSource"   init-method="init" destroy-method="close">  <property name="driverClassName" value="${jdbc.mysql.DriverClassName}"/>  <property name="url" value="${jdbc.mysql.Url}"/>  <property name="username" value="${jdbc.mysql.UserName}"/>  <property name="password" value="${jdbc.mysql.UserPassword}"/>  <!-- 初始化連接大小 -->  <property name="initialSize" value="5"/>  <!-- 連接池最大使用連接數量 -->  <property name="maxActive" value="30"/>  <!-- 連接池最小空閑 -->  <property name="minIdle" value="2"/>  <!-- 獲取連接最大等待時間 -->  <property name="maxWait" value="300"/>  <property name="validationQuery" value="SELECT 1"/>  <property name="testOnBorrow" value="false"/>  <property name="testOnReturn" value="false"/>  <property name="testWhileIdle" value="true"/>  <!-- 配置間隔多久才進行一次檢測，檢測需要關閉的空閑連接，單位是毫秒 -->  <property name="timeBetweenEvictionRunsMillis" value="10000"/>  <!-- 配置一個連接在池中最小生存的時間，單位是毫秒 -->  <property name="minEvictableIdleTimeMillis" value="30000"/>  <!-- 打開removeAbandoned功能 -->  <property name="removeAbandoned" value="true"/>  <!-- 1800秒，也就是30分鐘 -->  <property name="removeAbandonedTimeout" value="1800"/>  <!-- 關閉abanded連接時輸出錯誤日志 -->  <property name="logAbandoned" value="true"/>  <!-- 監控數據庫 -->  <property name="filters" value="stat"/> </bean> <bean id="multipleDataSource" class="com.we.database.MultipleDataSource">  <property name="defaultTargetDataSource" ref="dataSource"/>  <property name="targetDataSources">   <map>    <entry key="oracleDataSource" value-ref="dataSource"/>    <entry key="mySqlDataSource" value-ref="mySqlDataSource"/>   </map>  </property> </bean> <!-- oracle myBatis file --> <bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">  <property name="dataSource" ref="multipleDataSource"/>  <!--<property name="configLocation" value="classpath:configuration.xml" /> -->  <property name="mapperLocations" value="classpath:com/we/dao/mapper/*.xml"/> </bean> <bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">  <property name="basePackage" value="com.we.dao"/>  <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory"/> </bean> <!-- configure transaction --> <bean id="transactionManager"   class="org.springframework.jdbc.datasource.DataSourceTransactionManager">  <property name="dataSource" ref="dataSource"/> </bean> <!-- annotation transaction --> <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/> <!-- interception transatcion --> <tx:advice id="transactionAdvice" transaction-manager="transactionManager">  <tx:attributes>   <tx:method name="add*" propagation="REQUIRED"/>  </tx:attributes> </tx:advice> <!-- 配置數據庫注解aop --> <bean id="dataSourceAspect" class="com.we.database.DataSourceAspect"/> <aop:config>  <aop:pointcut id="transactionPointcut" expression="execution(* com.wewe.licai.service..*Impl.*(..))"/>  <aop:advisor pointcut-ref="transactionPointcut" advice-ref="transactionAdvice" order="2"/>  <!--數據源選擇切面,保證在事務開始之前執行-->  <aop:advisor pointcut-ref="transactionPointcut" advice-ref="dataSourceAspect" order="1" /> </aop:config>

@Documented@Retention(RetentionPolicy.RUNTIME)@Target({ElementType.METHOD,ElementType.TYPE})public @interface DataSource {  String name() default DataSource.oracleDataSource;  String mySqlDataSource = "mySqlDataSource";  String oracleDataSource = "oracleDataSource";}

/** * Created by eastday on 2017/9/21. */public class DataSourceAspect implements MethodBeforeAdvice,AfterReturningAdvice{ @Override public void afterReturning(Object returnValue, Method method,        Object[] args, Object target) throws Throwable {  MultipleDataSource.clearDataSource(); } @Override public void before(Method method, Object[] args, Object target)   throws Throwable {  //首先取類上的數據源  if(method.getDeclaringClass().isAnnotationPresent(DataSource.class) && !method.isAnnotationPresent(DataSource.class)) {   DataSource datasource = method.getDeclaringClass().getAnnotation(DataSource.class);   MultipleDataSource.setDataSource(datasource.name());   //方法上的數據源 優先級高于類上的  } else if (method.isAnnotationPresent(DataSource.class)) {   DataSource datasource = method.getAnnotation(DataSource.class);   MultipleDataSource.setDataSource(datasource.name());  }  else  {   MultipleDataSource.setDataSource(DataSource.oracleDataSource);  } }}

public class MultipleDataSource extends AbstractRoutingDataSource { private static final ThreadLocal<String> dataSources = new InheritableThreadLocal<String>(); public static void setDataSource(String dataSource) {  dataSources.set(dataSource); } //清除數據源 public static void clearDataSource() {  dataSources.remove(); } @Override protected Object determineCurrentLookupKey() {  return dataSources.get(); }}

@DataSource(name = DataSource.mySqlDataSource)public class ContentServiceImpl implements IContentService { @Autowired private IContentDao contentDao; @Override public Content queryOne(String type) {  return contentDao.queryOne(type); }}