Golang模板方法模式定义算法结构

package main

// 定义算法步骤的接口
type Beverage interface {
  BoilWater()
  Brew()
  PourInCup()
  AddCondiments()
}

// 模板方法结构体
type BeverageMaker struct {
  beverage Beverage
}

// 模板方法：定义算法骨架
func (b *BeverageMaker) MakeBeverage() {
  b.beverage.BoilWater()
  b.beverage.Brew()
  b.beverage.PourInCup()
  b.beverage.AddCondiments()
}

// 咖啡实现
type Coffee struct{}

func (c *Coffee) BoilWater()         { <strong>println("将水煮沸")</strong> }
func (c *Coffee) Brew()              { <strong>println("冲泡咖啡")</strong> }
func (c *Coffee) PourInCup()         { <strong>println("倒入咖啡杯")</strong> }
func (c *Coffee) AddCondiments()     { <strong>println("加入糖和牛奶")</strong> }

// 茶实现
type Tea struct{}

func (t *Tea) BoilWater()            { <strong>println("将水煮沸")</strong> }
func (t *Tea) Brew()                 { <strong>println("冲泡茶叶")</strong> }
func (t *Tea) PourInCup()            { <strong>println("倒入茶杯")</strong> }
func (t *Tea) AddCondiments()        { <strong>println("加入柠檬")</strong> }

// 使用示例
func main() {
  coffee := &Coffee{}
  tea := &Tea{}

  coffeeMaker := &BeverageMaker{beverage: coffee}
  teaMaker := &BeverageMaker{beverage: tea}

  <strong>println("制作咖啡：")</strong>
  coffeeMaker.MakeBeverage()

  <strong>println("\n制作茶：")</strong>
  teaMaker.MakeBeverage()
}