设计模式 Design Pattern

设计原则 Design Principle

1. 单一职责原则 (Single Responsibility Principle, SRP)

2. 开闭原则 (Open-Closed Principle, OCP)

3. 里氏代换原则 (Liskov Substitution Principle, LSP)

4. 依赖倒转原则 (Dependency Inversion Principle, DIP)

5. 接口隔离原则 (Interface Segregation Principle, ISP)

6. 迪米特法则 (Law of Demeter, LoD)

创建型模式

工厂模式 Factory Method Pattern

The Factory Method Pattern defines an interface for creating an object, but lets subclasses decide which class to instantiate. Factory Method lets a class defer instantiation to subclasses.

class diagram

抽象工厂模式 Abstract Factory Pattern

The Abstract Factory Pattern provides an interface for creating families of related or dependent objects without specifying their concrete classes.

class diagram

结构型模式

行为型模式

命令模式 Command Pattern

Command模式将一个请求封装为一个对象，从而允许您用不同的请求、队列或日志请求来参数化其他对象，并支持可撤销的操作。 The Command Pattern encapsulates a request as an object, thereby letting you parameterize other objects with different requests, queue or log requests, and support undoable operations.

class diagram

对于细小琐碎的具体命令，在Java 8中可以用Lambada表达式快速传入到Invoker中