need space between currency symbol and amount

问题:

I'm trying to print INR format currency like this:

NumberFormat fmt = NumberFormat.getCurrencyInstance();
fmt.setCurrency(Currency.getInstance("INR"));
fmt.format(30382.50);

shows Rs30,382.50, but in India its written as Rs. 30,382.50(see http://www.flipkart.com/) how to solve without hardcoding for INR?

回答1:

It's a bit of a hack but in a very similar situation, I used something like this

NumberFormat format = NumberFormat.getCurrencyInstance(new Locale("en", "in"));
String currencySymbol = format.format(0.00).replace("0.00", "");
System.out.println(format.format(30382.50).replace(currencySymbol, currencySymbol + " "));

all the currencies I had to deal with involved two decimal places so i was able to do "0.00" for all of them but if you plan to use something like Japanese Yen, this has to be tweaked. There is a NumberFormat.getCurrency().getSymbol(); but it returns INR instead for Rs. so that cannot be used for getting the currency symbol.

回答2:

See if this works:

DecimalFormat fmt = (DecimalFormat) NumberFormat.getInstance();
fmt.setGroupingUsed(true);
fmt.setPositivePrefix("Rs. ");
fmt.setNegativePrefix("Rs. -");
fmt.setMinimumFractionDigits(2);
fmt.setMaximumFractionDigits(2);
fmt.format(30382.50);

Edit: Fixed the first line.

回答3:

I don't see any easy way to do this. Here's what I came up with...

The key to getting the actual currency symbol seems to be passing the destination locale into Currency.getSymbol:

currencyFormat.getCurrency().getSymbol(locale)

Here's some code that seems like it mostly works:

public static String formatPrice(String price, Locale locale, String currencyCode) {

    NumberFormat currencyFormat = NumberFormat.getCurrencyInstance(locale);
    Currency currency = Currency.getInstance(currencyCode);
    currencyFormat.setCurrency(currency);

    try {
        String formatted = currencyFormat.format(NumberFormat.getNumberInstance().parse(price));
        String symbol = currencyFormat.getCurrency().getSymbol(locale);

        // Different locales put the symbol on opposite sides of the amount
        // http://en.wikipedia.org/wiki/Currency_sign
        // If there is already a space (like the fr_FR locale formats things),
        // then return this as is, otherwise insert a space on either side
        // and trim the result
        if (StringUtils.contains(formatted, " " + symbol) || StringUtils.contains(formatted, symbol + " ")) {
            return formatted;
        } else {
            return StringUtils.replaceOnce(formatted, symbol, " " + symbol + " ").trim();
        }
    } catch (ParseException e) {
        // ignore
    }
    return null;
}

回答4:

I dont think you can.

You should take a look at http://site.icu-project.org/

There might be better locale-specific currency formatting provided by icu4j.

回答5:

An easier method, kind of workaround. For my locale, the currency symbol is "R$"

public static String moneyFormatter(double d){

    DecimalFormat fmt = (DecimalFormat) NumberFormat.getInstance();
    Locale locale = Locale.getDefault();
    String symbol = Currency.getInstance(locale).getSymbol(locale);
    fmt.setGroupingUsed(true);
    fmt.setPositivePrefix(symbol + " ");
    fmt.setNegativePrefix("-" + symbol + " ");
    fmt.setMinimumFractionDigits(2);
    fmt.setMaximumFractionDigits(2);
    return fmt.format(d);
}

Input:

moneyFormatter(225.0);

Output:

"R$ 225,00"