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FlyWeightFactory is responsible for creating and managing meta-units. When a client requests, the factory needs to check whether there are eligible objects in the current object pool. If so, it returns the existing object. If not, it creates a new object. FlyWeight is a superclass. When it comes to shared pools, It is easy to think of JDBC connection pooling in Java, Considering the characteristics of each connection, It is not difficult for us to sum up: Applies to several objects that are shared, They have some common attributes, Take the database connection pool as an example, url, driverClassName, username, password and dbname, these attributes are the same for each connection, so it is suitable to use the meta-sharing mode to process, build a factory class, take the above similar attributes as internal data and the others as external data, and pass them in as parameters when calling methods, thus saving space and reducing the number of instances.侦探唐朔（杨奇鸣饰），因未婚妻（孙夕尧饰）在韩国被害，只身在异国寻找幕后真凶、不惜一切为爱“灭罪”，期间，因结识了记者王安琪（蔡文静饰）、国际刑警申俊贤（安圣浩饰）、以及中国留学生周浩辰（金澔辰饰），发生了使案情愈加扑朔迷离、错综复杂的故事。然而，市川却有以结婚为前提交往的女性。“你到底是抱着什么样的心情抱着我？”美纱绪虽然很混乱，但知道自己是出轨对象，却和市川继续“秘密恋爱”。穴 いかりや長介1949年，国民党在大陆的政权轰然倒塌，其残部纷纷撤入台湾。为取得全国的解放，共产党第三野战军继续向南挺进。王本利（尤勇 饰）所在的独立师红六团是这次作战的主力，然而由于海上作战经验和一支正规海军的缺乏，红六团九千多名官兵全部葬身海底。侥幸活下来的王本利为不忘这段惨痛的历史，以好友的名字更名为王山魁。抗美援朝胜利后，王山魁被新组建的海军政委卢信泉（杜志国 饰）调至麾下，正式从一名陆军军官转变为海军副司令。在此期间，他与美丽的女军医许锦云（郑卫莉 饰）结为夫妇，还卧薪尝胆钻研对抗国军千吨级战舰的刺刀战，并成功地以几艘驱逐舰和鱼雷舰击沉敌人的千吨级战舰“荆门号”和“樟江号”，为当年红六团的战友一血前耻。在接下来的几十年里，这位铁骨铮铮的汉子随新中国经历了无数的荣誉和磨难……. . .3. Integrated learning