在域类中声明布尔值而不出现在数据库中

public class Order {
    private boolean paid;

    public boolean isPaid() {
        return paid;
    }

    public void setPaid(boolean paid) {
        this.paid = paid;
    }
}

public class User {
    public enum Role {
        ADMIN, USER, GUEST
    }

    private Role role;

    public Role getRole() {
        return role;
    }

    public void setRole(Role role) {
        this.role = role;
    }
}

public interface OrderState {
    void pay(Order order);

    void cancel(Order order);

    // 其他操作方法...
}

public class CreatedState implements OrderState {
    @Override
    public void pay(Order order) {
        // 状态转换逻辑...
    }

    @Override
    public void cancel(Order order) {
        // 状态转换逻辑...
    }

    // 其他操作方法...
}

public class PaidState implements OrderState {
    // 状态方法实现...
}

public class CancelledState implements OrderState {
    // 状态方法实现...
}

public class Order {
    private OrderState state;

    public void pay() {
        state.pay(this);
    }

    public void cancel() {
        state.cancel(this);
    }

    // 其他操作方法...
}