https://www.htmlgoodies.com/java/persist-data-from-a-servlet-using-an-injected-data-access-object/
Persist Data from a Servlet using an Injected Data Access Object In the Create a Java Enterprise Application Controller in Eclipse article we developed a
persistdataservletusinginjected
https://www.cloudbees.com/blog/using-the-data-access-object-pattern-in-a-microservice-architecture
Discussing the Data Access Object design pattern and how it can be used to communicate with multiple data sources in microservice architecture.
data access objectmicroservice architectureusingpattern