引言在软件开发中，设计模式是一种解决常见问题的经验总结，它提供了一套可复用的解决方案，帮助开发人员更高效地编写可维护和可扩展的代码。单例模式是设计模式中的一种，它确保一个类只有一个实例，并提供一个全局访问点。 Singleton Patte

在软件开发领域，SOLID原则是一组设计原则，旨在提高代码的可维护性、可读性和可扩展性。 SOLID Principles 这五个原则分别是单一职责原则（Single Responsibility Principle，简称SRP）开放封闭

MVC, MVP and MVVM design patterns are most popular technologies in our web application. Many people don’t understand what’s difference among them, so do I. But I found a blog which explains the difference of three design patterns, and its’ really good.

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There are three most popular MV-* design patterns: MVC, MVP and MVVM. These are widely used by the various technologies.