在Spring中，有没有办法处理从自定义异常处理程序内部抛出的异常？

// 自定义异常类
public class CustomException extends RuntimeException {
    public CustomException(String message) {
        super(message);
    }
}

// 自定义异常处理程序
@ControllerAdvice
public class CustomExceptionHandler {

    @ExceptionHandler(CustomException.class)
    @ResponseBody
    public ResponseEntity<String> handleCustomException(CustomException ex) {
        // 处理自定义异常
        return new ResponseEntity<>(ex.getMessage(), HttpStatus.INTERNAL_SERVER_ERROR);
    }
}

// 在控制层中抛出自定义异常
@RestController
public class UserController {

    @Autowired
    private UserService userService;

    @GetMapping("/users/{id}")
    public User getUser(@PathVariable String id) {
        User user = userService.getUserById(id);
        if (user == null) {
            throw new CustomException("User not found");
        }
        return user;
    }
}