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待听明了缘故，更是换来七嘴八舌的埋怨。强国。The modified status is: niuLet's define another initEvent function, which makes all ordinary objects have the function of publishing and subscribing, as follows:把一座钢城沿长江由武汉搬到重庆,这是旷世之举。为抗日,陆,贺二家经历了,并结下了三代情缘。陆越和贺超,亲似兄妹.随父母,钢厂就是他们的。大家认定他们会是夫妻,可他们说,在"小"家我们是兄妹。在"大"家我们就是"夫妻"。这对"夫妻"正在圆父辈的强国梦。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.