Controller Advice SpringBoot

Here is how to implement ControllerAdvice in SpringBoot

import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.ControllerAdvice;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.context.request.WebRequest;

import java.util.HashMap;
import java.util.Map;

@ControllerAdvice
public class GlobalExceptionHandler {

    @ExceptionHandler(FirstException.class)
    public ResponseEntity<Map<String, String>> handleFirstException(FirstException ex, WebRequest request) {
        Map<String, String> response = new HashMap<>();
        response.put("error", "FirstException occurred");
        response.put("message", ex.getMessage());
        return new ResponseEntity<>(response, HttpStatus.BAD_REQUEST);
    }

    @ExceptionHandler(SecondException.class)
    public ResponseEntity<Map<String, String>> handleSecondException(SecondException ex, WebRequest request) {
        Map<String, String> response = new HashMap<>();
        response.put("error", "SecondException occurred");
        response.put("message", ex.getMessage());
        return new ResponseEntity<>(response, HttpStatus.INTERNAL_SERVER_ERROR);
    }

    @ExceptionHandler(Exception.class)
    public ResponseEntity<Map<String, String>> handleAllOtherExceptions(Exception ex, WebRequest request) {
        Map<String, String> response = new HashMap<>();
        response.put("error", "Unexpected error");
        response.put("message", ex.getMessage());
        return new ResponseEntity<>(response, HttpStatus.INTERNAL_SERVER_ERROR);
    }
}