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有整整 10 天木有更文了，这段时间确实比较忙。 有加我微信的朋友知道我上周末出去春游了，部门组织去了趟外伶仃岛，环境挺不错的，这段时间去的人也比较少，值得去玩。 今天讲讲上周末一次生产问题的复盘。 周日中午从外伶仃岛回来就直奔公司，因为生产出了些问题。问题是这样的：HBase…

Without violating encapsulation,capture and externalize an object's internal state so that the object can be restored to this state later. …

Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in …

Represent an operation to be performed on the elements of an object structure. Visitor lets you define a new operation without changing the…

Convert the interface of a class into another interface clients expect.Adapter lets classes work together that couldn't otherwise because o…

Decouple an abstraction from its implementation so that the two can vary independently. 将抽象和实现解耦，使得两者可以独立地变化。 现在手机二分天下，安卓手机和苹果手机目前占有率高居 98.…

Compose objects into tree structures to represent part-whole hierarchies.Composite lets clients treat individual objects and compositions o…

Define a one-to-many dependency between objects so that when one object changes state,all its dependents are notified and updated automatic…

Allow an object to alter its behavior when its internal state changes.The object will appear to change its class. 当一个对象内在状态改变时允许其改变行为，这个对象看…