Example #1
0
        static void Main(string[] args)
        {
            {
                Console.WriteLine("************************");
                IHelper helper = new MySqlHelper();
                helper.Query <Program>();
                helper.Delete <Program>();
                helper.Update <Program>();
                helper.Add <Program>();
            }
            {
                Console.WriteLine("************************");
                IHelper helper = new OracleHelper();
                helper.Query <Program>();
                helper.Delete <Program>();
                helper.Update <Program>();
                helper.Add <Program>();
            }
            {
                Console.WriteLine("************************");
                IHelper helper = new SqlserverHelper();
                helper.Query <Program>();
                helper.Delete <Program>();
                helper.Update <Program>();
                helper.Add <Program>();
            }
            {
                //引入第三方的redis,不适配
                Console.WriteLine("************************");
                IHelper helper = new RedisHelperInherit();//类适配器
                helper.Query <Program>();
                helper.Delete <Program>();
                helper.Update <Program>();
                helper.Add <Program>();
            }
            {//组合优于继承
                Console.WriteLine("***************");
                Console.WriteLine("************************");
                IHelper helper = new RedisHelperCombination();//对象适配器
                helper.Query <Program>();
                helper.Delete <Program>();
                helper.Update <Program>();
                helper.Add <Program>();
            }
            //都做到了适配,都能新旧适配起来
            //组合优于继承 1.继承是强侵入形的 会带过来父类的方法(有多余的东西)
            //            2.灵活性问题(组合是依赖抽象的,继承是依赖细节的)
            //应用总结:
            //属于不救模式,全新引入新的组件要用上的
            //不能在项目一开始设计的时候就搞适配器,徒增难度
            //时机选择


            Console.WriteLine("Hello World!");
        }
Example #2
0
        static void Main(string[] args)
        {
            try
            {
                {
                    IHelper helper = new SqlServerHelper();
                    helper.Add <Program>();
                    helper.Delete <Program>();
                    helper.Query <Program>();
                    helper.Update <Program>();
                }

                {
                    IHelper helper = new OracleHelper();
                    helper.Add <Program>();
                    helper.Delete <Program>();
                    helper.Query <Program>();
                    helper.Update <Program>();
                }

                {
                    IHelper helper = new MysqlHelper();
                    helper.Add <Program>();
                    helper.Delete <Program>();
                    helper.Query <Program>();
                    helper.Update <Program>();
                }

                {
                    //由于Redis是第三方的类库,虽然当中也有增删改查,
                    //但我们无法直接让其继承IHelper 故而无法像如下使用
                    //此时我们应当考虑适配器模式

                    //    IHelper helper = new RedisHelper();
                    //    helper.Add<Program>();
                    //    helper.Delete<Program>();
                    //    helper.Query<Program>();
                    //    helper.Update<Program>();
                }

                {
                    IHelper helper = new RedisHelperInherit();
                    helper.Add <Program>();
                    helper.Delete <Program>();
                    helper.Query <Program>();
                    helper.Update <Program>();

                    RedisHelperInherit helperInherit = new RedisHelperInherit();

                    helperInherit.AddRedis <Program>(); //强侵入性,继承导致父类有的子类必须也有
                }

                {
                    IHelper helper = new RedisHelperCombination();
                    helper.Add <Program>();
                    helper.Delete <Program>();
                    helper.Query <Program>();
                    helper.Update <Program>();
                }
            }
            catch (Exception e)
            {
                Console.WriteLine(e.Message);
                // throw;
            }
        }