假设一个场景:每天骑自行车下班回家。我有两条路可以走,1:顺着经十路走,2:顺着经一路走。
好,我们有两个回家的方法
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看看上面两个方法,有啥不同呢?。哦除了走哪条路,其他的都是一样的
这样一样的方法我们抽象为模板方法,作为基类,走哪条路就让子类去做吧
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仔细看一下,代码中多了一个hook()方法,这个方法是做啥的呢?有什么好处呢。哦,原来作用是子类可以自己控制是否要执行AlongRoad()方法。假如我今天住朋友家,我只要推车子,开门就行了。(朋友家在车棚)。这个用在这个例子不太恰当,先这样吧