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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.大将登城，将早已准备好的白布挂好。该剧改编自李道宇作家的原作小说，以一个乡下村庄为背景，讲述教画画的海媛和经营着小书店的恩燮之间温暖人心的爱情故事。 朴敏英饰演海媛，她是一个生活在这个时代，带着悲伤和伤痛的人物。徐康俊饰演恩燮，是一个感性直进帅气的男性。这下，连张槐和青木也都笑了起来。2, Civil Aircraft Driver License (Business License or Route Transportation License)这次青石上的沟壑，比之前两个要宽得多。刘邦呵呵一笑，并不插话，对于宋义拉着他挑拨离间这种事。