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Treatment methodThe 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.　　佛山，童年叶问和义兄叶天赐及小师妹李美慧一同跟随咏春宗师陈华顺(洪金宝 饰)门下学习咏春拳。未久，陈华顺去世后，叶问即跟随掌门师兄吴仲素(元彪 饰)继续学习咏春拳。Singleton: Guarantees that a class has only one instance and provides a global access point to access it.本剧讲述了从上流家庭逃出来的奇怪少女徐春和优等生韩仁尚因未婚先孕，使得平凡人家的女孩嫁入豪门后引发出的的一系列矛盾与混乱的故事。The local people of my age pondered for a moment and said this sentence: