Use case analysis of spring MVC mybatis multi data source

The project needs to obtain data from other websites because it is a temporary demand. I didn't expect to need multiple data sources at the beginning of the project

So Baidu searched and found that it only needed to change the ApplicationContext of spring XML file and writing three tool classes can be perfectly implemented

applicationContext. xml

DataSourceContextHolder. java

DataSourceType. Java (set static variables)

Next, this is the key dynamic datasource Java, which inherits the abstract method determinecurrentlookupkey in abstractroutingdatasource, is the core of the route that implements the data source This method is overridden here.

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