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这一回，能名正言顺地请秦伯伯来，咱们就少了许多顾忌。External communication with a subsystem must be conducted through a unified facade object. The facade mode provides a high-level interface, making the subsystem easier to use. Each subsystem has only one facade class, and this facade class has only one instance, that is, it is a singleton pattern. But the whole system can have multiple facade classes.Netflix西语罪案动作剧集《红日狂花》宣布续订第2季,新季今年7月23日开播。The intermediary mode is also used to reduce the coupling between classes, because if there is a dependency relationship between classes, it is not conducive to the expansion and maintenance of functions, because as long as one object is modified, other related objects have to be modified. If you use the mediator mode, you just need to care about the relationship with the Mediator class, the relationship between specific classes and the scheduling to the Mediator, which is a bit like the spring container. Let's look at the picture first:/thirstyYang Liping Spokesman: 500,000 yuan per year Tang Zhenzong Spokesman: 500,000 Hong Kong dollars every two years