@RequestMapping

In Spring boot we have different types of annotation , annotation means meta data which have some specific meaning @RequestMapping annotation do specific work if you have 2 to 3 method in a controller then you are hitting the common request in the 3 method like ex emp/Id, emp/CreateEmpolyee then you can give a do emp as parent of that controller and @RequestMapping annotation will help you to do so, you just have to do

@RestController
@RequestMapping(path = "/emp")
public class EmployeeController {

    @Autowired
    private EmployeeServiceImp employeeServiceImp;

    @GetMapping("/{id}")
    public Optional<EmployeeEntity> getEmployeeById(@PathVariable long id){
        return employeeServiceImp.getEmployeeById(id);
    }
}

This is the example where i have a parent Mapping so that i don’t have to put again and again emp in my Http request in the controller.