Parameter 0 of method sqlSessionTemplate in org.mybatis.spring.boot.autoconfigure.MybatisAutoConfiguration required a single bean, but 2 were found:

Parameter 0 of method orderSqlSessionFactory in com.config.MultipleDBConfig required a single bean, but 2 were found: - orderDataSource: defined by method 'orderDataSource' in class path resource [com/config/MultipleDBConfig.class] - crmDataSource: defined by method 'crmDataSource' in class path resource [com/config/MultipleDBConfig.class] Action: Consider marking one of the beans as @Primary, updating the consumer to accept multiple beans, or using @Qualifier to identify the bean that should be consumed

坑：以上方式鏈接多數據源時，

在springboot1.x時  datasource上要在一個寫數據源上標記@Primary為主數據源

而在springboot2.X時則不需要