Spring's data source

Spring provides two such data sources (all in the Org.springframework.jdbc.datasource package):
Drivermanagerdatasource: Creates a new connection on each connection request. Unlike DBCP's Basicdatasource, Drivermanagerdatasource provides no pool management for the connection.
Singleconnectiondatasource: Returns the same connection on each connection request. Although it differs in the strict sense of the pool management data source, we can think of it as a pool with only one connection. Drivermanagerdatasource supports multi-threaded concurrent execution, but is implemented on the basis of consumption system performance, Singleconnectiondatasource does not support multi-threading, so the mode of production, both types are not considered. It is recommended to use DBCP and c3p0.

Spring's data source