一个项目中需要使用两个数据库，Oracle 和Mysql，于是参考各个blog，实现此功能。写好后才发现，原来的事务失效了，我去...

spring-mybatis.xml 配置

<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> <!-- 配置数据源: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}"/> <!-- 初始化连接大小 --> <property name="initialSize" value="5"/> <!-- 连接池最大使用连接数量 --> <property name="maxActive" value="30"/> <!-- 连接池最小空闲 --> <property name="minIdle" value="2"/> <!-- 获取连接最大等待时间 --> <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"/> <!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 --> <property name="timeBetweenEvictionRunsMillis" value="10000"/> <!-- 配置一个连接在池中最小生存的时间，单位是毫秒 --> <property name="minEvictableIdleTimeMillis" value="30000"/> <!-- 打开removeAbandoned功能 --> <property name="removeAbandoned" value="true"/> <!-- 1800秒，也就是30分钟 --> <property name="removeAbandonedTimeout" value="1800"/> <!-- 关闭abanded连接时输出错误日志 --> <property name="logAbandoned" value="true"/> <!-- 监控数据库 --> <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> <!-- 配置数据库注解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"/> <!--数据源选择切面,保证在事务开始之前执行--> <aop:advisor pointcut-ref="transactionPointcut" advice-ref="dataSourceAspect" order="1" /> </aop:config>

注解切换，默认使用oracle数据源

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

注解方式实现切换数据源,搜索注释,更换注释上面的数据源,支持类注释和方法注释

/** * 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 { //首先取类上的数据源 if(method.getDeclaringClass().isAnnotationPresent(DataSource.class) && !method.isAnnotationPresent(DataSource.class)) { DataSource datasource = method.getDeclaringClass().getAnnotation(DataSource.class); MultipleDataSource.setDataSource(datasource.name()); //方法上的数据源 优先级高于类上的 } else if (method.isAnnotationPresent(DataSource.class)) { DataSource datasource = method.getAnnotation(DataSource.class); MultipleDataSource.setDataSource(datasource.name()); } else { MultipleDataSource.setDataSource(DataSource.oracleDataSource); } }}

继承AbstractRoutingDataSource实现数据源切换

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

使用demo

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

以上这篇解决spring mvc 多数据源切换,不支持事务控制的问题就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持。