不删除Java大十进制中的前导零

Question

I want to write 5 digit zip code to an Excel file. for ex. for number 01803 if I don't convert it to string it will store it as 01803 string but shows an error on excel file.So I want to store it as Big Decimal number without stripping the leading 0's.but Big decimal by default strips it for the current case.

In excel, when I store it as string and convert that to number in excel it will strip the leading zero's

    Address address = new Address();
    address.setPostalCode("01803");
    String postCode = address.getPostalCode();
    if(postCode.matches("^[0-9]*$") && postCode.length() > 2){
        if(postCode.charAt(0) == '0'){
            System.out.println(postCode.toString());    
        } else {
            System.out.println(new BigDecimal(postCode).doubleValue());                         
        }
    }else {
        System.out.println(address.getPostalCode());
    }

Answer 1

Can give this a try

 String abc = 0003;
 formatToCVSValue(abc);

    public static String formatToCVSValue(String s)
        {
            if(s==null || !hasLength(s))
                return "";
            else
            {
                return "\"=\"\""+s+"\"\"\"";
            }
        }

When open in excel, you will see exactly 0003 instead of '0003