go中使用map的键排序

package main

import (
   "fmt"
   "sort"
)

func main() {
   //待排序队列
   var stuScore = map[int]string{1:"ee",5:"cc",4:"ff",9:"qq",3:"aa",2:"bb"}
   fmt.Println(stuScore) //map[1:ee 2:bb 3:aa 4:ff 5:cc 9:qq]

   nums:=make([]int,0)
   for k:=range stuScore{
      nums=append(nums,k)
   }
   sort.Sort(sort.Reverse(sort.IntSlice(nums)))
   fmt.Println(nums) //[9 5 4 3 2 1]

   for _,num:=range nums {
      fmt.Println(num,stuScore[num])
   }