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深夜刘小念黯然回家，闯进孟小蔷闺房，两人不打不相识，刘小念种种倒霉行状激起孟小蔷怜爱之心。6.1 Basic Syntax这些大户在山yīn城存在的时间不短了。但实际上他像是月光武者一样，隐藏在平常人中的正义的使者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.