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李长明欢喜地笑道：嗳，就是这个意思。30FlyWeightFactory 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.林白走上台，只见场面气氛热烈无比。两人大喜，忙接过去猛啃起来，一边吃一边故意猛夸这人肉好味道。7.4 Unqualified after thoracic organ surgery.爆笑之后，大家也终于知道唐伯虎为什么要去追求秋香了，这八位娇妻换谁来了，也受不了。