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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.耐得住风吹雨打的万物之灵是女人；经得起千辛万苦的圣洁之神是女人！Although the propaganda posters of the Second World War once said the truth that "more words must be lost", "knowledge is power" is also an indisputable motto, especially in the protection of modern business technology systems. There is no doubt that as the chief information security officer of an emerging banking organization, it is absolutely substandard to choose to avoid talking about it after the first round of attacks. Facing the security threat, what everyone needs is smooth information, new attack data and the development trend of defense system, all of which need a good communication environment.Open the website of "Learning Power" and first see the top red and white logo area. "Learning" is a free and easy Mao character, and "Powerful Country" is a square bold character. Below these four large characters, nine small characters are marked "Director of Propaganda Department of the CPC Central Committee". On the right side of the logo area is a sentence signed with the name of General Secretary Xi Jinping: "Dreams start with learning, and career starts with practice." This sentence comes from his speech on October 21, 2013 at the celebration meeting of the 100th anniversary of the founding of the European and American Homecoming Association. He has made many speeches on strengthening study, building a big learning country and promoting the whole Party to learn.　　《风平浪静的闲暇》的主角是一位28岁的职场女性，性格老好人的她在东京一家公司过着稳定但也无趣的生活，在一次晕倒醒来后，她开始反省自己的人生，决定辞掉工作、甩掉男友、退掉租房，断绝所有过去的联系，重新开始人生。Sculpture modeling, such as animal models of horses and deer, can adopt polygon modeling method, through basic operations such as drawing triangles-vertex movement stretching-mirror image-expansion on animal photos.