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The reason why the logic for creating an object is put into a separate class is that it can be used by multiple clients. And separates the creation and use of objects. However, this design also has many defects. First of all, SimpleFactory is a specific class, so we must program for the implementation, making the system lose its flexibility in this respect. Second, if we add new products, we have to modify the code in SimpleFactory, which violates the opening and closing principle. The above model is also called simple factory. He does not appear in GOF mode, it is more like a programming habit.黎章微微一笑，心道这周菡倒是个善良的姑娘。是的，天启一定是为了弥补令狐冲内力低这个缺憾，才设置这样的情节。韩信动兵了，自己又能如何呢？想当初韩信和彭越都曾经是自己的臣下，都有为自己所用的机会，却未能把握好，以至于现在都出来成为自己的心腹之患。在徽王等人的关照下，杨府毫无疑问已是本岛第二豪宅。Enterprises must strive to predict the possible security threats to applications and network services and mitigate the consequences of these attacks by formulating security contingency plans.$("form"). Bind (