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40 lines
808 B

```go
package factory
import (
"fmt"
)
type Restaurant interface {
GetFood()
}
type Aa struct {
}
type Bb struct {
}
func (a *Aa) GetFood() {
fmt.Println("Aa ... 测试工厂生产, ", &a)
}
func (b *Bb) GetFood() {
fmt.Println("Bb ... 测试工厂生产, ", &b)
}
func NewRestaurant(name string) Restaurant {
switch name {
case "Aa":
return &Aa{}
case "Bb":
return &Bb{}
}
return nil
}
```
* `type Restaurant interface { GetFood() }` 声明接口,声明`type Aa struct {}` 和 `type Bb struct {}` 结构体,通过结构体声明接口函数,使得实现接口,从而实现多态。
* 通过工厂函数,通过不同参数,调用不同接口实现,完成(接口)多态调用。而工厂函数返回实际对象,从而使用实际对象,调用接口具体实现。