spring mybatis 多数据源配置

1、创建好数据库的配置文件

mysql.url=jdbc:mysql://***/***?useUnicode=true&characterEncoding=UTF-8
mysql.username=***
mysql.password=***
mysql.driverClassName=com.mysql.jdbc.Driver

dws.url=jdbc:postgresql://***/***
dws.username=***
dws.password=***
dws.driverClassName=org.postgresql.Driver

2、applicationContext.xml文件配置

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xsi:schemaLocation="
       http://www.springframework.org/schema/beans
       http://www.springframework.org/schema/beans/spring-beans.xsd
       http://www.springframework.org/schema/context
       http://www.springframework.org/schema/context/spring-context.xsd
       http://www.springframework.org/schema/mvc
       http://www.springframework.org/schema/mvc/spring-mvc.xsd
       http://www.springframework.org/schema/tx
       http://www.springframework.org/schema/tx/spring-tx.xsd">

    <!--开启自动扫描-->
    <context:component-scan base-package="com.huawei.test"/>

    <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="locations">
            <list>
                <value>classpath:config/jdbc.properties</value>
            </list>
        </property>
    </bean>
    <!--现在可以替换为如下方式-->
    <!--使用逗号分隔多个值-->
    <!--<context:property-placeholder location="classpath:config/jdbc.properties"/>-->

    <!--配置数据源-->
    <bean id="dataSource_mysql" class="org.apache.commons.dbcp2.BasicDataSource">
        <property name="url" value="${mysql.url}"/>
        <property name="username" value="${mysql.username}"/>
        <property name="password" value="${mysql.password}"/>
        <property name="driverClassName" value="${mysql.driverClassName}"/>
    </bean>
    <bean id="sqlSessionFactory_mysql" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource_mysql"/>
        <property name="mapperLocations" value="classpath:mybatis/mysql/*.xml"/>
    </bean>
    <bean id="mapperScannerConfigurer_mysql" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.huawei.test.dao.mysql"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory_mysql"/>
    </bean>
    <!--数据库事务控制-->
    <bean id="transactionManager_mysql" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource_mysql"/>
    </bean>

    <bean id="dataSource_dws" class="org.apache.commons.dbcp2.BasicDataSource">
        <property name="url" value="${dws.url}"/>
        <property name="username" value="${dws.username}"/>
        <property name="password" value="${dws.password}"/>
        <property name="driverClassName" value="${dws.driverClassName}" />
    </bean>
    <bean id="sqlSessionFactory_dws" class="org.mybatis.spring.SqlSessionFactoryBean">
        <property name="dataSource" ref="dataSource_dws"/>
        <property name="mapperLocations" value="classpath:mybatis/dws/*.xml"/>
    </bean>
    <bean id="mapperScannerConfigurer_dws" class="org.mybatis.spring.mapper.MapperScannerConfigurer">
        <property name="basePackage" value="com.huawei.test.dao.dws"/>
        <property name="sqlSessionFactoryBeanName" value="sqlSessionFactory_dws"/>
    </bean>
    <bean id="transactionManager_dws" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource_dws"/>
    </bean>

    <!--使用annotation定义事务，比如使用注解-->
    <tx:annotation-driven/>
    <mvc:annotation-driven/>
</beans>

3、创建好对应的mappers文件