This tutorial code used to explain Spring with Hibernate for persistence layer and RESTful web services to call CRUD operations and HikariCP API for improvement database connection pool management by following tasks:

• add spring-context, mysql-connector-java, spring-orm spring-webmvc and dependencies
• add javax.servlet-api dependencies for implementing Java server-side.
• add spring-data-jpa, hibernate-core, hibernate-entitymanager and hibernate-validator dependencies for implementing Persistence ORM layer.
• add HikariCP and hibernate-hikaricp dependencies for supporting Database Connection Pool feature.
• using Entity bean to add new DAO object and using @Entity and @Table annotations plus @GeneratedValue for generating table key value automatically.
• support using @RestController and @GetMapping/@PostMapping/@DeleteMapping annotations for HTTP requests(GET/POST/DELETE) to access CRUD services.
• using @InitBinder to convert String date input to java.util.Date format.
• using @PathVariable, @RequestParam, @RequestBody annotations in Controller class for getting REST requests params.
• using different HttpStatus for applying in Http Responses result(OK, CREATED, InternalServerError, NoContent and so on).

TIP: Database DDL and DML SQL queries is added to db_files folder