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The reason why the logic for creating an object is put into a separate class is that it can be used by multiple clients. And separates the creation and use of objects. However, this design also has many defects. First of all, SimpleFactory is a specific class, so we must program for the implementation, making the system lose its flexibility in this respect. Second, if we add new products, we have to modify the code in SimpleFactory, which violates the opening and closing principle. The above model is also called simple factory. He does not appear in GOF mode, it is more like a programming habit.那天是居住在童话王国的所有精灵们都去参加的一个盛大的庆典，美杜莎和毒丸两位巫婆趁机攻击了庆典现场把童话王国变成了灰色石头，包括参加经典的所有精灵。巫婆把童话王国的神秘力量聚集到一个七彩石头里要把它永远埋没在黑暗当中。 珠珠和鲁鲁因为在家练习表演而晚到了庆典现场，她们从巫婆手里成功抢回秘密石头，但回到现实的过程中又遭到巫婆的攻击，秘密石头被打碎散落在各个地方。受变成石头的童话王国影响，现实世界也变得暗淡无光，珠珠的朋友也都丧失了一切记忆，为了尽快收集秘密花朵胶带恢复童话王国，珠珠和鲁鲁的冒险就这样开启。吴凌珑抱着杨必远，看着这个长得与杨长帆幼时一模一样的孩子，此时真的动容了。名誉债名誉债名誉债名誉债城门如约打开了。两军阵容，各种窃窃私语就此展开。尹旭一阵激动，当即喊了蒲俊、苏岸跟上。