如何在会话Bean中使用自定义异常？

public class CustomSessionException extends RuntimeException {
    public CustomSessionException(String message) {
        super(message);
    }
}

@Service
public class SessionService {
    public void checkSession() {
        // 检查会话是否过期
        if (isSessionExpired()) {
            throw new CustomSessionException("Session has expired");
        }
    }

    private boolean isSessionExpired() {
        // 实现会话过期检查逻辑
    }
}

@RestController
public class SessionController {
    @Autowired
    private SessionService sessionService;

    @GetMapping("/checkSession")
    public String checkSession() {
        try {
            sessionService.checkSession();
            return "Session is valid";
        } catch (CustomSessionException e) {
            return "Error: " + e.getMessage();
        }
    }
}