尽管将一个系统分割成许多对象通常可以增加其可服用性, 但是对象间相互连接的激增又会降低其可复用性了. 大量的连接使得一个对象不可能在没有改变其他对象的支持下工作, 系统表现为一个不可分割的整体, 所以, 对系统的行为进行任何较大的改动就十分困难了. 中介者模式, 用一个中介对象来封装一系列的对象交互. 中介者使各对象不需要显式的相互引用, 从而使其耦合松散, 而且可以独立的改变他们之间的交互. 123456789101112131415161718192021222324252627282930…

Overview Design patterns are ways to reuse design solutions that other software developers have created for common and recurring problems. The design patterns on this page are from the book Design Patterns, Elements of Reusable Object-Oriented Softwa…

对日常在 Android 中实用设计模式进行一下梳理和总结,文中参考了一些网站和大佬的博客,如 MichaelX(xiong_it) .菜鸟教程.四月葡萄.IAM四十二等,在这里注明下~另外强烈推荐图说设计模式,看了一部分,有些介绍的还是很通俗易懂的. 设计模式(持续更新ing-) 单例模式 (Singleton pattern) 确保一个类只有一个实例,并且自行实例化并向整个系统提供这个实例(并提供对该实例的全局访问) 饿汉式.懒汉式名词解释: 饿汉式:不管程序是否需要这个对象的实例,总是在类…

原文链接:http://www.c-sharpcorner.com/UploadFile/19b1bd/design-patterns-simplified-part3-factory/ Design Patterns Simplified - Part 3 (Simple Factory)[设计模式简述--第三部分(简单工厂)] This article explains why and how to use the Simple Factory Design Pattern in softw…

原文链接: http://www.c-sharpcorner.com/UploadFile/19b1bd/design-patterns-simplified-part-2-singleton/ Design Patterns Simplified - Part 2 (Singleton)[设计模式简述--第二部分(单例模式)]       I am here to continue the explanation of Design Patterns. Today we will explai…

From Head First Design Patterns. Design Principle: Idnetify the aspects of your application that vary and separate them from what stays the same. Here's another way to think about it: Take the parts that vary and encapsulate them, so that later you c…

Apex allows you to build just about any custom solution on the Force.com platform. But what are the common design patterns and associated best practices for Apex development, and how can you leverage these patterns and best practices to avoid reinven…

设计模式是一套被反复使用.多数人知晓的.经过分类编目的.代码设计经验的总结,使用设计模式的目的是提高代码的可重用性,让代码更容易被他人理解,并保证代码可靠性.它是代码编制真正实现工程化. 四个关键元素:(1) Pattern Name, (2) Problem, (3) Solution, (4) Consequences. 01. Factory Method Pattern /* The product should be created by his own factory. */ Log…

When you're on the way which is unknown and dangerous, just follow your mind and steer the boat. 软件模式: 设计模式.体系结构模式.分析模式.过程模式等. 体系结构模式 ANSIIEEEStd1471一200对体系结构的定义:一个系统的基本组织,表现为系统的组件.组件之间的相互关系.组件和环境之间的相互关系以及设计和进化的原则. 黑板模式 黑板模式是一种常用的架构模式,应用中的多种不同数据处理逻辑相…

It's time to review design patterns, especially when I reach the turning-point of my career. That's not a small test, but a challenge to my life. Hold it! http://blog.csdn.net/lovelion/article/details/17517213 View and Diagram 用户视图:Use Case Diagram /…