項目中目前用的是Oracle數據庫,未來不知道什麼時刻確定要切換到MySql數據庫,老闆讓現在支持mysql,未來切換隻要改下配置靈活切到Mysql,項目用SpringBoot+Mybatis,配置很簡單,網上搜了幾個直接照着改老是不成功,試了好幾個方法,下面分享下可以用的:
1.mybatis配置兩個數據庫
iwhalecloud.mysql.datasource.driver=com.mysql.jdbc.Driver #iwhalecloud.mysql.datasource.url=jdbc:mysql://122.***.9.**:19087/ iwhalecloud.mysql.datasource.url=jdbc:mysql://10.45.**.**:3306/testdb?useUnicode=true&characterEncoding=utf-8&useSSL=false iwhalecloud.mysql.datasource.username=root iwhalecloud.mysql.datasource.password=root iwhalecloud.oracle.datasource.driver=oracle.jdbc.driver.OracleDriver iwhalecloud.oracle.datasource.url=jdbc:oracle:thin:@10.45.**.**:1521:testDb iwhalecloud.oracle.datasource.username=root iwhalecloud.oracle.datasource.password=root
在mybatis配置文件配置兩個數據源,紅色字體是今後我們切換數據庫要改動的地方
<bean id="datasource1" parent="parentDataSource" init-method="init" destroy-method="close"> <property name="url" value="${iwhalecloud.mysql.datasource.url}"/> <property name="username" value="${iwhalecloud.mysql.datasource.username}"/> <property name="password" value="${iwhalecloud.mysql.datasource.password}"/> <property name="driverClassName" value="${iwhalecloud.mysql.datasource.driver}"/> </bean> <bean id="datasource2" parent="parentOracleDataSource" init-method="init" destroy-method="close"> <property name="url" value="${iwhalecloud.oracle.datasource.url}"/> <property name="username" value="${iwhalecloud.oracle.datasource.username}"/> <property name="password" value="${iwhalecloud.oracle.datasource.password}"/> <property name="driverClassName" value="${iwhalecloud.oracle.datasource.driver}"/> </bean> <bean id="dataSource" class="com.iwhalecloud.simulation.common.bean.MultiDataSource"> <property name="targetDataSources"> <map key-type="java.lang.String"> <entry value-ref="datasource2" key="oracle"/> </map> </property> <property name="defaultTargetDataSource" ref="datasource2"/> </bean>
2.配置databaseIdProvider,紅色地方是引用下方配置
<bean id="sqlSessionFactory"
class="org.mybatis.spring.SqlSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="vfs" value="org.mybatis.spring.boot.autoconfigure.SpringBootVFS"/>
<!-- 自動掃描Mapping.xml文件 -->
<property name="mapperLocations">
<array>
<value>classpath*:/mapper/*.xml</value>
</array>
</property>
<property name="databaseIdProvider" ref="databaseIdProvider" />
<property name="configLocation" value="classpath:mybatis/mybatisConfig.xml"/>
</bean>
<bean id="vendorProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean"> <property name="properties"> <props> <prop key="Oracle">oracle</prop> <prop key="MySQL">mysql</prop> </props> </property> </bean> <bean id="databaseIdProvider" class="org.apache.ibatis.mapping.VendorDatabaseIdProvider"> <property name="properties" ref="vendorProperties"/> </bean>
3.使用:如果只是簡單的增刪改查,沒有用到函數,一套sql可以共用,不必加databaseId,如果負載sql需要區分
<select id="qryAllUserInfo" databaseId="oracle" parameterType="****" >
select * from sys_user
</select>
<select id="qryAllUserInfo" databaseId="mysql" parameterType="****" >
select * from sys_user
</select>