面向对象编程原则

SRP The Single Responsibility Principle: A class should have one, and only one, reason to change.

OCP The Open Closed Principle: You should be able to extend a classes behavior, without modifying it.

LSP The Liskov Substitution Principle: Derived classes must be substitutable for their base classes.

ISP The Interface Segregation Principle: Make fine grained interfaces that are client specific.

DIP The Dependency Inversion Principle: Depend on abstractions, not on concretions.

 

The Liskov Substitution Principle (LSP)
Any function that uses a base class must not be confused when a derived class is substituted for the base class

 

The Dependency Inversion Principle
1. High level modules should not depend upon low level modules. Both should depend upon abstractions
2. Abstractions should not depend upon details. Details should depend upon abstractions