使用go的interface案例实现多态范式操作
时间:2021-07-03 08:27:09|栏目:Golang|点击: 次
看程序:
package main import "fmt" type BaseIntf interface { Process() } type Msg1 struct { req int rsp int } func (p *Msg1) Process() { fmt.Println("process 1") } type Msg2 struct { req int rsp int } func (p *Msg2) Process() { fmt.Println("process 2") } func main() { m1 := new(Msg1) m1.Process() m2 := new(Msg2) m2.Process() }
变一下:
package main import "fmt" type BaseIntf interface { Process() } func Run(proc BaseIntf) { fmt.Println("run") proc.Process() } type Msg1 struct { req int rsp int } func (p *Msg1) Process() { fmt.Println("process 1") } type Msg2 struct { req int rsp int } func (p *Msg2) Process() { fmt.Println("process 2") } func main() { m1 := new(Msg1) Run(m1) m2 := new(Msg2) Run(m2) }
这种风格的代码,见了很多次了。
不多说。
补充:go语言中通过空接口查询来实现多态
直接看代码吧~ 空接口算是go语言的精妙之处
package main type Person struct { name string age int } type Cat struct { kind string sex bool price int } func main() { family := make([]interface{},0,10) obj1 := &Person{ name: "吕云飞", age: 28, } obj2 := &Person{ name: "胡景茹", age: 18, } obj3 := &Cat{ kind: "英短", sex: true, price: 2000, } family = append(family, obj1, obj2, obj3) for _, value := range family { switch obj := value.(type) { case *Person: print(obj.name + "\n") case *Cat: print(obj.kind + "\n") } } }
输出结果如下
吕云飞
胡景茹
英短