【go标准库系列】go语言标准库reflect反射学习

源码

package main

import (
	"flag"
	"fmt"
	"net/http"
	"reflect"
)
type GoService struct {

}
func (G *GoService) HttpServer(port string){
	http.HandleFunc("/", func(responseWriter http.ResponseWriter, request *http.Request) {
    	responseWriter.Write([]byte("hello word"))
	})
	http.ListenAndServe(":"+port,nil)
}
func main(){
	cmd:=flag.String("cmd","","cmd is a string indecated what server")
	arg:=flag.String("args","","p is a string ,parameter for service")
	flag.Parse()
	if len(*cmd)==0 {
		flag.Usage()
		return
	}
	in :=make([]reflect.Value,0)
	if len(*arg)!=0 {
		in=append(in,reflect.ValueOf(*arg))
	}
	//指定类
	service:=&GoService{}
	f:=reflect.ValueOf(service).MethodByName(*cmd)
	if !f.IsValid() {
		return
	}
	f.Call(in)
		//u:=User{1,"golang",12}
		//Info(u)
}

编译

go build -o bin/runt.exe main.go

执行

cd bin
runt.exe -cmd=HttpServer -args=8091