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观察者模式（Observer Pattern）观察者模式是一种行为设计模式，它定义了对象之间的一对多依赖关系，使得当一个对象改变状态时，所有依赖于它的对象都会得到通知并自动更新。概念主题（Subject）：维护一系列观察者，提供用于增加或删除观察者的方法。观察者（Observer）：为那些在...

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【设计模式——学习笔记】23种设计模式——观察者模式Observer（原理讲解+应用场景介绍+案例介绍+Java代码实现）

案例引入有一个天气预报项目，需求如下：气象站可以将每天测量到的温度、湿度、气压等等以公告的形式发布出去(比如发布到自己的网站或第三方)需要设计开放型API，便于其他第三方也能接入气象站获取数据提供温度、气压、湿度的接口测量数据更新时，要能实时的通知给第三方原始方案实现设计一个WeatherData类...

设计模式之观察者模式(Java实现)

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设计模式--观察者模式初探和java Observable模式

初步认识观察者模式　　观察者模式又称为发布/订阅(Publish/Subscribe)模式,因此我们可以用报纸期刊的订阅来形象的说明: 　　　　报社方负责出版报纸. 　　　　你订阅了该报社的报纸,那么只要报社发布了新报纸,就会通知你,或发到你手上. 　　　　如果你不想再读报纸,可以取消订阅,这样,...

设计模式 - 观察者模式(Observer Pattern) Java内置用法

观察者模式(Observer Pattern) Java内置用法本文地址: http://blog.csdn.net/caroline_wendy/article/details/26601659 观察者模式(observer pattern)具体解释, 參见: http:/...

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