装饰模式的核心：被装饰对象（最原始），装饰对象（带有装饰功能的被装饰对象）。
假设有一个被装饰对象叫“concretecomponent ”，两个装饰对象叫“concretedecoratora”、“concretedecoratorb”。装饰是锦上添花的事情，concretecomponent 被装饰之前已经最好了最基本的工作，concretedecoratora和concretedecoratorb只是在这个基本工作里额外加了些工作。
装饰是无序的，可以concretedecoratora先装饰concretecomponent，然后concretedecoratorb装饰concretedecoratora。也可以concretedecoratorb先装饰concretecomponent，然后concretedecoratora装饰concretedecoratorb。
被装饰对象和装饰类是否需要抽象跟这里的装饰模式无关。
我要评论using system;
namespace consoleapp4
{
class program
{
public static void main(string[] args)
{
concretecomponent concretecomponent = new concretecomponent();
concretedecoratora concretedecoratora = new concretedecoratora();
concretedecoratorb concretedecoratorb = new concretedecoratorb();
concretedecoratora.setcomponent(concretecomponent);
concretedecoratorb.setcomponent(concretedecoratora);
concretedecoratorb.operation();
}
}
abstract class component
{
public abstract void operation();
}
class concretecomponent:component
{
public override void operation()
{
console.writeline("具体对象的操作");
}
}
abstract class decorator : component
{
protected component component;
public void setcomponent(component component)
{
this.component = component;
}
public override void operation()
{
if (component != null)
{
component.operation();
}
}
}
class concretedecoratora : decorator
{
private string addstate;
public override void operation()
{
base.operation();
addstate = "a addstate";
console.writeline("a类装饰");
}
}
class concretedecoratorb : decorator
{
private string addstate;
public override void operation()
{
base.operation();
addstate = "b addstate";
console.writeline("b类装饰");
}
}
}
using system;
namespace consoleapp4
{
class program
{
public static void main(string[] args)
{
person person = new person("白石");
tshirts shirts = new tshirts();
overalls overalls = new overalls();
shirts.decorate(person);
overalls.decorate(shirts);
}
}
class person
{
public person()
{
}
private string name;
public person (string name)
{
this.name = name;
}
public virtual void show()
{
// 什么装饰都没有的基本展示。
console.writeline($"{name} 一个人的基本show");
}
}
abstract class finery : person
{
protected person component;
public void decorate(person person)
{
this.component = person;
}
public override void show()
{
if (component != null)
{
component.show();
}
}
}
class tshirts : finery
{
public override void show()
{
base.show();
console.writeline("穿t恤");
}
}
class overalls : finery
{
public override void show()
{
base.show();
console.writeline("工装裤");
}
}
}
如对本文有疑问， 点击进行留言回复！！
荐 厉害了！阿里P8架构师用4大技术文档带你深入解读爆火的中台战略
FlowableException: Error initialising dmn data model报错问题
网友评论