企业网站规范/拼多多搜索关键词排名

模式特点：动态地为对象增加额外的职责
程序实例：展示一个人一件一件穿衣服的过程。

package mainimport ("fmt"
)type Finery interface {Show()
}type Person struct {Name     stringFineries []Finery
}func (this *Person) Show() {fmt.Println("装扮的", this.Name)for _, finery := range this.Fineries {finery.Show()}
}func (this *Person) Decorate(finery Finery) {if this.Fineries == nil {this.Fineries = make([]Finery, 0, 0)}this.Fineries = append(this.Fineries, finery)
}type TShirts struct {Finery
}func (t *TShirts) Show() {fmt.Println("大T恤")
}type BigTrouser struct {Finery
}func (b *BigTrouser) Show() {fmt.Println("大裤衩")
}type Sneakers struct {Finery
}func (s *Sneakers) Show() {fmt.Println("破球鞋")
}type LeatherShoes struct {Finery
}func (l *LeatherShoes) Show() {fmt.Println("皮鞋")
}type Suit struct {Finery
}func (s *Suit) Show() {fmt.Println("西装")
}type Tie struct {Finery
}func (t *Tie) Show() {fmt.Println("领带")
}func main() {person1 := &(Person{"小菜", nil})fmt.Println("第一种装扮：")dtx := new(TShirts)kk := new(BigTrouser)pqx := new(Sneakers)person1.Decorate(dtx)person1.Decorate(kk)person1.Decorate(pqx)person1.Show()person2 := &(Person{"小菜", nil})fmt.Println("第二种装扮：")px := new(LeatherShoes)ld := new(Tie)xz := new(Suit)person2.Decorate(xz)person2.Decorate(ld)person2.Decorate(px)person2.Show()person3 := &(Person{"小菜", nil})fmt.Println("第三种装扮：")xz2 := new(Suit)pqx2 := new(Sneakers)kk2 := new(BigTrouser)ld2 := new(Tie)person3.Decorate(xz2)person3.Decorate(ld2)person3.Decorate(kk2)person3.Decorate(pqx2)person3.Show()
}