dto String -> 포멧설정

@Data
public class testDto {

    private String mobile_phone;    // 휴대폰번호
    private String biz_no;                  // 사업자번호
    private String qty;             // 물량
    private String fee;              // 요금
    private String from_date;               // 시작일
    private String to_date;                 // 종료일

    public void setFrom_date(String from_date){
        this.from_date = from_date;

        if(!StringUtils.isEmpty(this.from_date)){
            try {
                SimpleDateFormat inputFormat = new SimpleDateFormat("yyyyMMdd");
                SimpleDateFormat outputFormat = new SimpleDateFormat("yyyy.MM.dd");

                Date date = inputFormat.parse(this.from_date);
                this.from_date = outputFormat.format(date);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    public void setTo_date(String to_date){
        this.to_date = to_date;

        if(!StringUtils.isEmpty(this.to_date)){
            try {
                SimpleDateFormat inputFormat = new SimpleDateFormat("yyyyMMdd");
                SimpleDateFormat outputFormat = new SimpleDateFormat("yyyy.MM.dd");

                Date date = inputFormat.parse(this.to_date);
                this.to_date = outputFormat.format(date);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    public void setQty(String qty) {
        this.qty = qty;
        if(!StringUtils.isEmpty(this.qty)){
            try {
                int qty_int = Integer.parseInt(qty);
                this.qty = String.format("%,d", qty_int);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    public void setFee(String fee) {
        this.fee = fee;
        if(!StringUtils.isEmpty(this.fee)){
            try {
                int fee_int = Integer.parseInt(fee);
                this.fee = String.format("%,d", fee_int);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
     public void setBiz_no(String biz_no) {
        this.biz_no = biz_no;
        if(!StringUtils.isEmpty(this.biz_no)){
            try {
                String regEx = "([0-9]{3})-?([0-9]{2})-?([0-9]{5})";
                this.biz_no = biz_no.replaceAll(regEx, "$1-$2-$3");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }

    public void setMobile_phone(String mobile_phone) {
        this.mobile_phone = mobile_phone;
        if(!StringUtils.isEmpty(this.mobile_phone)){
            try {
                String regEx = "(\\d{3})(\\d{3,4})(\\d{4})";
                this.mobile_phone = mobile_phone.replaceAll(regEx, "$1-$2-$3");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    }
}