工作中需要接入其他公司业务系统的数据进行分析，于是接入它们的db。
使用双数据源配置感觉如下：
database、sessionFactory、扫描器、事务管理器等双份。 听说如果两个数据源需要一起使用加事务的时候有点恶心，没有遇到该业务问题所以没有深入。
具体配置：
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="http://www.springframework.org/schema/beans"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean class="com.kunpu.appopm.dal.config.JDBCPlaceholderConfigurer">
<property name="order" value=""/>
<property name="ignoreUnresolvablePlaceholders" value="true"/>
<property name="location" value="file:/opt/configs/appopm/datasource.properties"/>
</bean> <bean id="dataSource1" class="com.alibaba.druid.pool.DruidDataSource"
init-method="init" destroy-method="close">
<property name="driverClassName" value="${datasource.driverClassName}"/>
<property name="url" value="${datasource1.url}"/>
<property name="username" value="${datasource1.username}"/>
<property name="password" value="${datasource1.password}"/>
<property name="connectionProperties" value="${datasource.connectionProperties}"/>
<property name="initialSize" value="${datasource.initialsize}"/>
<property name="maxActive" value="${datasource.maxActive}"/>
<property name="minIdle" value="${datasource.minIdle}"/>
<property name="maxWait" value="${datasource.maxWait}"/>
<property name="validationQuery" value="SELECT 1 FROM DUAL"/>
<property name="testOnBorrow" value="${datasource.testOnBorrow}"/>
<property name="testOnReturn" value="${datasource.testOnReturn}"/>
<property name="testWhileIdle" value="${datasource.testWhileIdle}"/>
<property name="timeBetweenEvictionRunsMillis"
value="${datasource.timeBetweenEvictionRunsMillis}"/>
<property name="minEvictableIdleTimeMillis"
value="${datasource.minEvictableIdleTimeMillis}"/>
<property name="removeAbandoned" value="${datasource.removeAbandoned}"/>
<property name="removeAbandonedTimeout" value="${datasource.removeAbandonedTimeoutMillis}"/>
<property name="logAbandoned" value="${datasource.logAbandoned}"/>
<property name="filters" value="${datasource.filters}"/>
<property name="poolPreparedStatements" value="${datasource.poolPreparedStatements}"/>
<property name="maxPoolPreparedStatementPerConnectionSize"
value="${datasource.maxPoolPreparedStatementPerConnectionSize}"/>
</bean> <bean id="sessionFactory1" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource1"/>
<property name="configLocation" value="classpath:/configs/mybatis-config.xml"/>
<property name="mapperLocations">
<list>
<value>classpath:/mapper1/**/*.xml</value>
</list>
</property>
<property name="typeAliasesPackage" value="com.kunpu.appopm.dal.model"/>
<property name="plugins">
<list>
<bean class="com.kunpu.appopm.common.util.log.SQLLogInterceptor"/>
<bean class="com.kunpu.frameworks.cat.util.CatDBInterceptor"/>
<bean class="com.kunpu.frameworks.db.pagination.PaginationInterceptor">
<property name="dialect">
<bean class="com.kunpu.frameworks.db.pagination.MySqlDialect"/>
</property>
</bean>
</list>
</property>
</bean> <bean id="scanner1" class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sessionFactory1"/>
<property name="basePackage" value="com.kunpu.appopm.dal"/>
<property name="annotationClass" value="com.kunpu.appopm.dal.config.BaseDB"/>
<property name="properties">
<value>
mappers=tk.mybatis.mapper.common.Mapper
IDENTITY=MYSQL
notEmpty=true
</value>
</property>
</bean> <bean id="sqlSessionTemplate1" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="" ref="sessionFactory1"/>
</bean> <bean id="transactionManager1"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource1"/>
</bean> <!-- 事务模板 -->
<bean id="transactionTemplate1"
class="org.springframework.transaction.support.TransactionTemplate">
<property name="transactionManager" ref="transactionManager1"/>
<constructor-arg name="transactionManager" ref="transactionManager1"/>
</bean> <bean id="dataSource2" class="com.alibaba.druid.pool.DruidDataSource"
init-method="init" destroy-method="close">
<property name="driverClassName" value="${datasource.driverClassName}"/>
<property name="url" value="${datasource2.url}"/>
<property name="username" value="${datasource2.username}"/>
<property name="password" value="${datasource2.password}"/>
<property name="connectionProperties" value="${datasource.connectionProperties}"/>
<property name="initialSize" value="${datasource.initialsize}"/>
<property name="maxActive" value="${datasource.maxActive}"/>
<property name="minIdle" value="${datasource.minIdle}"/>
<property name="maxWait" value="${datasource.maxWait}"/>
<property name="validationQuery" value="SELECT 1 FROM DUAL"/>
<property name="testOnBorrow" value="${datasource.testOnBorrow}"/>
<property name="testOnReturn" value="${datasource.testOnReturn}"/>
<property name="testWhileIdle" value="${datasource.testWhileIdle}"/>
<property name="timeBetweenEvictionRunsMillis"
value="${datasource.timeBetweenEvictionRunsMillis}"/>
<property name="minEvictableIdleTimeMillis"
value="${datasource.minEvictableIdleTimeMillis}"/>
<property name="removeAbandoned" value="${datasource.removeAbandoned}"/>
<property name="removeAbandonedTimeout" value="${datasource.removeAbandonedTimeoutMillis}"/>
<property name="logAbandoned" value="${datasource.logAbandoned}"/>
<property name="filters" value="${datasource.filters}"/>
<property name="poolPreparedStatements" value="${datasource.poolPreparedStatements}"/>
<property name="maxPoolPreparedStatementPerConnectionSize"
value="${datasource.maxPoolPreparedStatementPerConnectionSize}"/>
</bean> <bean id="scanner2" class="tk.mybatis.spring.mapper.MapperScannerConfigurer">
<property name="sqlSessionFactoryBeanName" value="sessionFactory2"/>
<property name="basePackage" value="com.kunpu.appopm.dal"/>
<property name="annotationClass" value="com.kunpu.appopm.dal.config.BaseDB2"/>
<property name="properties">
<value>
mappers=tk.mybatis.mapper.common.Mapper
IDENTITY=MYSQL
notEmpty=true
</value>
</property>
</bean> <bean id="sessionFactory2" class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource2"/>
<property name="configLocation" value="classpath:/configs/mybatis-config.xml"/>
<property name="mapperLocations">
<list>
<value>classpath:/mapper2/**/*.xml</value>
</list>
</property>
<property name="typeAliasesPackage" value="com.kunpu.appopm.dal.model"/>
<property name="plugins">
<list>
<bean class="com.kunpu.appopm.common.util.log.SQLLogInterceptor"/>
<bean class="com.kunpu.frameworks.cat.util.CatDBInterceptor"/>
<bean class="com.kunpu.frameworks.db.pagination.PaginationInterceptor">
<property name="dialect">
<bean class="com.kunpu.frameworks.db.pagination.MySqlDialect"/>
</property>
</bean>
</list>
</property>
</bean> <bean id="sqlSessionTemplate2" class="org.mybatis.spring.SqlSessionTemplate">
<constructor-arg index="" ref="sessionFactory2"/>
</bean> <bean id="transactionManager2"
class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource2"/>
</bean> <!-- 事务模板 -->
<bean id="transactionTemplate2"
class="org.springframework.transaction.support.TransactionTemplate">
<property name="transactionManager" ref="transactionManager1"/>
<constructor-arg name="transactionManager" ref="transactionManager1"/>
</bean>
这里扫描指定dao使用的是basePage配合指定注解，应该是一点亮点吧。