Editorial draft for review. Prepared for the JavaWallah learning resource library.
Prepare the foundations
Get comfortable with Java classes, interfaces, collections and basic SQL before taking on a framework.
Understand application structure
Learn dependency injection and separate controllers, services and repositories. Start with one endpoint and one resource.
Add persistence and validation
Use JPA to map data and validate request inputs. Test successful and failing requests and return useful error responses.
Package and demonstrate
Document your endpoints, configure environments and practise deploying a small application. Explain its limitations clearly.