Go语言基础设计模式之策略模式示例详解

package main
import "fmt"
type User struct {
	Name string
}
func (this User) travel(t string) {
	switch t {
	case "飞机":
		fmt.Printf("%s,飞机出行\n", this.Name)
	case "火车":
		fmt.Printf("%s,火车出行\n", this.Name)
	case "走路":
		fmt.Printf("%s,走路出行\n", this.Name)
	default:
		fmt.Println("你未选择了出行方式吗")
	}
}
func main() {
	User{"张三"}.travel("飞机")
	User{"张三"}.travel("火车")
	User{"张三"}.travel("走路")
	User{"张三"}.travel("")
}

package main
import "fmt"
/*出行方式*/
type Itravel interface {
	Travel()
}
/*飞机*/
type Aircraft struct{}
/*火车*/
type Train struct{}
/*走路*/
type Walk struct{}
/*具体策略类 1：飞机出行*/
func (this Aircraft) Travel() {
	fmt.Println("飞机出行")
}
/*具体策略类 2：火车出行*/
func (this Train) Travel() {
	fmt.Println("火车出行")
}
/*具体策略类 3：走路出行*/
func (this Walk) Travel() {
	fmt.Println("走路出行")
}
/*环境类*/
type User struct {
	Name    string
	Itravel Itravel
}
func (this User) travel() {
	fmt.Printf("%s", this.Name)
	this.Itravel.Travel()
}
func main() {
	user := User{"张三", Aircraft{}}
	user.travel()
	user = User{"李四", new(Train)}
	user.travel()
	user = User{"王五", &Walk{}}
	user.travel()
}