11. 反射

获取类型和值

• TypeOf
• ValueOf
• pair

package main
import (
    "fmt"
    "reflect"
)
func main() {
    var num int =10
    fmt.Println("type:",reflect.TypeOf(num))
    fmt.Println("value:",reflect.ValueOf(num))
}

type: int
value: 10

获取字段和方法

package main
import (
    "fmt"
    "reflect"
)
type User struct {
    Name string
    Age int
}
func (this User)Invoke()  {
    fmt.Println("user method called")
}
func main() {
    var num int =10
    // 获取基础类型
    fmt.Println("type:",reflect.TypeOf(num))
    fmt.Println("value:",reflect.ValueOf(num))
    user :=User{
        Name: "Alice",
        Age:  19,
    }
    inputType := reflect.TypeOf(user)
    inputValue := reflect.ValueOf(user)
    // 遍历字段
    for i:=0;i<inputType.NumField();i++ {
        field := inputType.Field(i)
        fmt.Println("field:",field.Name,"value:",inputValue.Field(i).Interface())
    }
    // 遍历方法
    for i:=0;i<inputType.NumMethod();i++ {
        method := inputType.Method(i)
        fmt.Println("methodName:",method.Name)
    }
}

type: int
value: 10
field: Name value: Alice
field: Age value: 19
methodName: Invoke