如果我们在数据库中只有国家代码，则获取货币代码 [英] getting currency code if we have only country code in database

问题描述

我有获得国家货币的问题，我通过这些代码在数据库中有国家代码我必须在java中获取国家代码我如何为此建立代码请建议我。
im试用这个例子，但它无效。

i have problem getting the country currency, i am having the country code in database through these code i have to get the country code in java how do i make the code for this please suggest me. i m trying with this example but its not working.

    class Utils {
    public static SortedMap<Currency, Locale> currencyLocaleMap;
    static {
        currencyLocaleMap = new TreeMap<Currency, Locale>(
                new Comparator<Currency>() {
                    public int compare(Currency c1, Currency c2) {
                        return c1.getCurrencyCode().compareTo(
                                c2.getCurrencyCode());
                    }
                });
        for (Locale locale : Locale.getAvailableLocales()) {
            try {
                Currency currency = Currency.getInstance(locale);
                currencyLocaleMap.put(currency, locale);
            } catch (Exception e) {
            }
        }
    }

    public static String getCurrencySymbol(String currencyCode) {
        Currency currency = Currency.getInstance(currencyCode);
        System.out.println(currencyCode + ":-"
                + currency.getSymbol(currencyLocaleMap.get(currency)));
        return currency.getSymbol(currencyLocaleMap.get(currency));
    }
}

  public class GetCurrency {
    public static void main(String[] args) {

        Utils.getCurrencySymbol(Currency.getInstance("INR").getCurrencyCode());
        Utils.getCurrencySymbol(Currency.getInstance(Locale.JAPAN)
                .getCurrencyCode());
        Utils.getCurrencySymbol(Currency.getInstance(Locale.UK)
                .getCurrencyCode());

        Utils.getCurrencySymbol("INR");
    }
}

推荐答案

i找到我的问题的解决方案这是我已经完成的代码。

i found the solution for my problem this is the code i have done.

        public static Map<Currency, Locale> getCurrencyLocaleMap() {
        Map<Currency, Locale> currencyLocaleMap = new HashMap<Currency, Locale>();
        for (Locale locale : Locale.getAvailableLocales()) {
            try {
                Currency currency = Currency.getInstance(locale);
                currencyLocaleMap.put(currency, locale);
            } catch (Exception e) {
            }
        }
        return currencyLocaleMap;
    }

    public static String getCurrencySymbol(String currencyCode) {
        String currencySymbol = null;
        if (currencyCode == null || currencyCode.isEmpty()) {
            currencySymbol = currencyCode;
        } else {
            Locale currencyLocale = null;
            Map<Currency, Locale> currencyLocaleMap = null;
            Currency currency = null;
            try {
                currency = Currency.getInstance(currencyCode);
                currencyLocaleMap = getCurrencyLocaleMap();
                currencyLocale = currencyLocaleMap.get(currency);
            } catch (Exception e) {
                System.out.println("No symbol is there for currencyCode="
                        + currencyCode);
            }
            if (currency != null && currencyLocale != null) {
                currencySymbol = currency.getSymbol(currencyLocaleMap
                        .get(currency));
            } else {
                currencySymbol = currencyCode;
            }
        }
        return currencySymbol;
    }
}

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