将字符串中的数字转化为文字

   String ids = "1,2,3";
    String[] industryIdsArr = ids.split(",");
    String str = "";
    if (industryIdsArr != null && industryIdsArr.length > 0) {
 for (int i = 0; i < industryIdsArr.length; i++) {
 str += 1 + ",";
 }
 }
 str = str.substring(0, str.length() - 1);
 System.out.println(str);
}