golang web 跳转的实现

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package main

import (
   //"database/sql"
   //_ "github.com/mattn/go-sqlite3"
   "fmt"
   "html/template"
   "log"
   "net/http"
   "strconv"
)

type User struct {
   ID   int
   Name string
}

func (user User) String() string {
   format := `ID : %d Name: %s`
   return fmt.Sprintf(format, user.ID, user.Name)
}
func saveUser(w http.ResponseWriter, req *http.Request) {
   userId, _ := strconv.Atoi(req.FormValue("Id"))
   name := req.FormValue("name")
   out := strconv.Itoa(userId) + "-" + name
   u := &User{ID: userId, Name: name}
   log.Println(out, ";", u.String())
   //fmt.Fprintf(w, u.String())
   http.Redirect(w, req, "/", http.StatusFound)
}

func addUser(w http.ResponseWriter, r *http.Request) {
   t, _ := template.ParseFiles("tmpl/addUser.html")
   t.Execute(w, nil)
}

func main() {
   http.HandleFunc("/", addUser)
   http.HandleFunc("/user", saveUser)
   err := http.ListenAndServe(":8880", nil)
   if err != nil {
       log.Fatal("ListenAndServe: ", err.Error())
   }
}