go web编程-使用Mux控制路由访问

package mainimport (    "io"    "log"    "net/http")func main() {    mux := http.NewServeMux()    mux.Handle("/", &myHandler{})    err := http.ListenAndServe(":8080", mux)    if err != nil {        log.Fatal(err)    }}type myHandler struct {}func (*myHandler) ServeHTTP(w http.ResponseWriter, r *http.Request) {    io.WriteString(w, "hello")}