golang html/template template.ParseFiles(filenames) 相对路径问题

myhttp.go 
package main
import (
   "fmt"
   "html/template"
   "log"
   "net/http"
)
func login(w http.ResponseWriter,r *http.Request)  {
   fmt.Println("method:",r.Method)
   if r.Method == "GET" {
      t,_ :=template.ParseFiles("login.html")
      t.Execute(w,nil)
   } else {
      fmt.Println("username:",r.Form["username"])
      fmt.Println("password:",r.Form["password"])
   }
}
func main()  {
   http.HandleFunc("/login",login)
   err := http.ListenAndServe(":9090", nil)
   if err != nil {
      log.Fatal("ListenAndServe:",err)
   }
}

如上代码  login.html要和生成的可执行文件myhttp.exe在同一级目录