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);
}