[TOC] ## 示例 ### 装备示例 <details> <summary>main.go</summary> ``` package main import "fmt" // 享元 type IProperty interface{ GetHPLimit()int GetMPLimit()int } type PeopleBase struct{ MAX_HP int MAX_MP int } func NewPeopleBase()*PeopleBase{ return &PeopleBase{100,100} } func (this *PeopleBase)GetHPLimit()int{ return this.MAX_HP } func (this *PeopleBase)GetMPLimit()int{ return this.MAX_MP } type Helmet struct{ base IProperty HP_ADD int MP_ADD int } func (this *Helmet)GetHPLimit()int{ return this.base.GetHPLimit()+this.HP_ADD } func (this *Helmet)GetMPLimit()int{ return this.base.GetMPLimit()+this.MP_ADD } func NewHelmet(property IProperty,hp_add,mp_add int)*Helmet{ return &Helmet{property,hp_add,mp_add} } // 享元工厂来存放享元 type Element struct { Value interface{} } func newElement(value interface{})*Element{ return &Element{value} } type FlyweightFactory struct { pool map[string]*Element } func (this *FlyweightFactory) GetElement(key string) interface{} { return this.pool[key].Value } func (this *FlyweightFactory)SetElement(key string,value interface{}){ ne := newElement(value) this.pool[key]=ne } func NewFlyweight()*FlyweightFactory{ flyweight := FlyweightFactory{} flyweight.pool=make(map[string]*Element) return &flyweight } func main(){ // 创建享元 base := NewPeopleBase() fly := NewFlyweight() fly.SetElement("PeopleBase",base) // 生成两个人物 people_1 := fly.GetElement("PeopleBase").(IProperty) people_2 := fly.GetElement("PeopleBase").(IProperty) // 捡到装备了——装饰者 people_1 = NewHelmet(people_1,10,10) people_2 = NewHelmet(people_2,100,100) // 获取它们血量上限和魔法上限 hp_1 := people_1.GetHPLimit() mp_1 := people_1.GetMPLimit() hp_2 := people_2.GetHPLimit() mp_2 := people_2.GetMPLimit() fmt.Printf("People_1:\nHP:%d\nMP:%d\n",hp_1,mp_1) fmt.Printf("People_2:\nHP:%d\nMP:%d\n",hp_2,mp_2) } ``` </details> <br /> 输出 ``` People_1: HP:110 MP:110 People_2: HP:200 MP:200 ```