如何在spring控制器中处理特定于db的异常

@Controller
public class UserController {

    @Autowired
    private UserService userService;

    @ExceptionHandler(DataAccessException.class)
    public ResponseEntity<String> handleDatabaseException(DataAccessException ex) {
        // 处理数据库异常的逻辑
        // 记录日志、返回错误信息等
        return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("数据库异常");
    }

    @GetMapping("/users/{id}")
    public ResponseEntity<User> getUser(@PathVariable Long id) {
        User user = userService.getUserById(id);
        return ResponseEntity.ok(user);
    }
}