只需将您的区域设置为显示所需格式的数字的区域，例如：

$ echo '2222222.22' | LC_ALL=de_DE awk '{printf "%\047.02f\n", $0}'
2.222.222,22

$ echo '2222222.22' | LC_ALL=da_DK awk '{printf "%\047.02f\n", $0}'
2.222.222,22

字符串
请参阅https://stackoverflow.com/a/61911355/1745001了解其他可能的语言环境，以及如何在上述两种语言环境都不适合的情况下找到适合您的语言环境。

一个“C风格”的解决方案，适用于任何Awk：

$ cat data.txt
2.22
22.22
222.22
2222.22
22222.22
222222.22
2222222.22

字符串

$ cat filter.awk
{
   len = split( $0, a, "" ) 
   for ( i = len; i > 0; i-- )  # traverse the record character by character, 
   {                            #> in reverse: -> 22.2222222 ->
      n++
      m++

      if ( n == 3 )  # n: comma position counter: 
      {              #> 3rd pos? replace the dot with comma
         a[i] = ","
         m -= 4      # m: dot position counter: 
      }              #> decreased to -1 at the 3rd pos, will be 3 at the 7th pos

      if (( n > 6 ) && ( m % 3 == 0 ))  # we are at the 7th pos, time to insert a dot
      {
         rec = "." rec  # to get the reversed record right, build it in reverse
      }

      rec = a[i] rec  # ditto
   }

   print rec
   len = i = n = m = rec = ""
}

型

$ awk -f filter.awk data.txt
2,22
22,22
222,22
2.222,22
22.222,22
222.222,22
2.222.222,22

型