（六）ServeMux示例

package main

import (
	"fmt"
	"net/http"
)

type DB struct{
	name string
	age int
}

var gdb DB = DB{"catty",26}

func get(w http.ResponseWriter, req *http.Request) {
	// The "/" pattern matches everything, so we need to check
	// that we're at the root here.
	if req.URL.Path != "/get" {
		http.NotFound(w, req)
		return
	}
	fmt.Fprintf(w, "Welcome to the home page!\n")
	fmt.Fprintf(w, "name is %s, age is %d\n",gdb.name,gdb.age)
}

func (db *DB)list(w http.ResponseWriter, req *http.Request) {
	if req.URL.Path != "/list" {
		http.NotFound(w, req)
		return
	}
	fmt.Fprintf(w, "Welcome to the home page!\n")
	fmt.Fprintf(w, "name is %s, age is %d\n",db.name,db.age)
	w.Write([]byte("json message"))
}


func main(){
	db:=DB{"doggy",27}
	mux := http.NewServeMux()
	mux.HandleFunc("/get",get)
	mux.HandleFunc("/list",db.list)
	http.ListenAndServe("localhost:1234",mux)
}