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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.ALTER DATABASE SSDB SET EMERGENCY琪琪是在美国长大的泰裔女孩，优庭是在美国念书的留学生，二人一见钟情进入同居时代。可是，结婚毕竟要得到父母的同意，于是这一对接受西方教育的泰国青年男女回到泰国，一场误会之后，琪琪竟鬼使神差地成了优庭家的管家，但这仅仅是开始，他们为了取得传统、古板而又淳朴、善良的老人家的认可，为了摆脱暗恋优庭的坏女人“村中第一美女”莉达的纠缠，不得不展开了一场有欢笑也有泪水的爱情长跑。最后，当然是有情人终成眷属了。青莲很有自知之明，望望黄豆，把小脸一垮道：打不过三哥。正说着，众狼兵押着何府十几人前来报到。Zhu Yuanyuan Spokesman: 800,000 Summer Rain Spokesman Every Two Years: 800,000 RMB Every Two Years (Plane)