package main

 import (

     "io/ioutil"

     "log"

     "net/http"

 )

 func main() {

     http.HandleFunc("/", ShowIndex)

     log.Fatal(http.ListenAndServe("localhost:8000", nil))

 }

 func ShowIndex(w http.ResponseWriter, r *http.Request) {

     content, _ := ioutil.ReadFile("./index.html")

     w.Write(content)

 }

 //在浏览器上输入 localhost:8000 就可以显示 index.html