[utf8说明](https://pkg.go.dev/unicode/utf8)

获取真实字符串大小

  1. package main
  3. import (
  4.     "fmt"
  5.     "unicode/utf8"
  6. )
  8. func main() {
  9.     ch1 := "xiaolizi"
  10.     ch2 := "李"
  11.     ch3 := "l哥"
  12.     fmt.Printf("字符串%v 字节大小or字符长度%d  真实字符长度%d\n", ch1, len(ch1), utf8.RuneCountInString(ch1))
  13.     fmt.Printf("字符串%v 字节大小or字符长度%d  真实字符长度%d\n", ch2, len(ch2), utf8.RuneCountInString(ch2))
  14.     fmt.Printf("字符串%v 字节大小or字符长度%d  真实字符长度%d\n", ch3, len(ch3), utf8.RuneCountInString(ch3))
  15. }