Proxy模式在现实当中的场景
例如:有一个应届毕业生到深圳找工作,到深圳后没房子住,于是打算去找房子,但是深圳这么大,不可能一个人把整个深圳的房子去找一遍.于是他就跑到了附近的租售公司打听下附近有没有房子租. 这里所说的租售公司相当于 "代理" ,也就是中间层.
场景演示代码如下:
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以上演示了简单的Proxy模式在现实当中的例子.为什么要用到Proxy模式?
一:应届毕业生不可能把整个深圳的房子找遍,这个时候就会碰到困难.
二:为了解决困难 现实当中的Proxy模式油然而升,也就出现了中介机构,也就是程序上的"代理".
三:在我们开发程序当中,有时碰到直接调用对象的方法会不太好,所以很多人想到了用间接的写个类再去访问对象的方法.
这种间接的方式就是Proxy.