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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.小雨，她不是千金小姐，只是处处可见的邻家女孩。小雨对流浪动物充满爱心，但因为所属兽医院关门了而失业，在忙着照顾流浪动物及找工作的同明，卻遇到了从小住到大的将军老街即将面临无情的财团收购计划。小雨善良及正义的个性，带领着街民们共同抵抗财团，除了凝聚起街民的团结及捍卫家园的同仇敌慨外，更改变一个大企业的企业人格，同时也改造了街民的生活。It happens that I like you too阿欢从小就有一个很“废”的超能力：挨一耳光就能看见他和别人剩下的见面次数。一次意外让他深信，一旦突破了次数的限制就会带来厄运。从此阿欢得过且过，游戏人间。而青梅竹马的晓彤和阿欢的见面次数高达一万多，他本以为注定是一生的伴侣，所以毫不珍惜。直到有一天，阿欢发现自己和晓彤的见面次数只剩下几次，好哥们阿伟也要离他而去。他意识到自己必须做出改变。阿欢能否打破命运的魔咒呢？　　带你进入坚强背后的脆弱与不堪《犀利仁师之药不能停路云霏》刘诗诗颠覆喜剧演绎逗比女汉子路云霏。不要叫我吃药啦，吃药我就不萌啦～新浪刘诗诗微吧/百度刘诗诗吧/爱奇艺电视剧联合出品。"No, the whole waist is broken and people are divided into two parts from the middle." Wang Zeduan said.