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Law of Demeter (LoD) is also called Least Knowledge Principle (LKP), which means that an object should know as little as possible about other objects. In other words, a module or object should interact with other entities as little as possible, making the system functional modules relatively independent, so that when a module is modified, the fewer modules will be affected and the easier it will be to expand.《咱们穿越吧第二季》于2016年6月19日晚20:30分接档《怒放霸王花》在四川卫视首播，2016年9月4日收官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.我去热些拿来给娘和云姨尝尝。如果他们两人同气连枝，对于我们而言是个巨大的威胁，所以不必须要予以打击。　　勇基绝不放弃帮他找到生活意义的仁静；仁静却不能不为因为自己放弃了一切的秀焕而动摇；秀焕想再一次拥有仁静。