一共兩種，直接看代碼
import (
"fmt"
)
func main() {
//var i interface{} = "TT"
var i interface{} = 77
value, ok := i.(int)
if ok {
fmt.Printf("類型匹配int:%d\n", value)
} else {
fmt.Println("類型不匹配int\n")
}
if value, ok := i.(int); ok {
fmt.Println("類型匹配整型：%d\n", value)
} else if value, ok := i.(string); ok {
fmt.Printf("類型匹配字符串:%s\n", value)
}
}