public static void showMessages(CRUD_Enum type, int count) {
        switch (type) {
        case Add:
            System.out.println("添加了" + count + "条记录。");
            break;
        case Delete:
            System.out.println("删除了" + count + "条记录。");
            break;
        case Update:
            System.out.println("更新了" + count + "条记录。");
            break;
        case Query:
            System.out.println("匹配了" + count + "条记录。");
            break;
        case List:
            System.out.println("共有" + count + "条记录。");
            break;
        default:
            break;
        }
    }