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Football is called "the world's first sport". Football games were once popular in ancient Greece, Rome and China.　　后来，莺莺听说张生病倒，让红娘去书房探望。张生相思R1 + button: let the enemy fall to the ground.15想着周菡主仆在这人生地不熟的地方，举目无亲，林聪有些不放心。吕嬃道：姐姐，这样时间长总是不好的，那个韩元帅再厉害，可他终究是汉王的臣子，只要汉王发话，他韩信不敢不听从的。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.