如何在Spring Boot中定制JSON响应？

public class CustomResponse {
    private int statusCode;
    private String message;
    private Object data;

    // 省略构造函数、getter和setter方法
}

public class CustomException extends RuntimeException {
    private int statusCode;
    private String message;

    // 省略构造函数、getter和setter方法
}

@ControllerAdvice
public class CustomExceptionHandler extends ResponseEntityExceptionHandler {

    @Override
    protected ResponseEntity<Object> handleExceptionInternal(Exception ex, Object body, HttpHeaders headers, HttpStatus status, WebRequest request) {
        CustomResponse customResponse = new CustomResponse();
        customResponse.setStatusCode(status.value());
        customResponse.setMessage(ex.getMessage());
        // 设置其他响应字段

        return new ResponseEntity<>(customResponse, headers, status);
    }
}

@RestController
public class MyController {

    @GetMapping("/data")
    public CustomResponse getData() {
        CustomResponse customResponse = new CustomResponse();
        customResponse.setStatusCode(200);
        customResponse.setMessage("Success");
        customResponse.setData(someData);

        return customResponse;
    }

    // 省略其他控制器方法
}