Extract currency from formatted amount

I'm getting a formatted amount of money from a web service. It can be in different formats and using different currencies, eg

$ 1.10

€ 1,10

1,10 €

EUR 1.10 (perhaps, I'm not sure I'll actually encounter this one)

I would like to extract the currency symbol ( $ ) from it, and if possible get the associated Currency object (Java) from that symbol. I don't need to extract the amount, I can get that somewhere else.

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you can use a regular expression, to parse your result from the webservice. You have to filter all characters, except numbers, dots and whitespaces. Here is the regex for that:

String regexp = "[^0-9.,s]*";

The first group of the matching result is the currency symbol (or the name eg EUR).

Here is my sample method:

public void test() throws Exception {
    String text = "2.02 $";
    String regexp = "[^0-9.,s]*";
    Pattern p = Pattern.compile(regexp);
    Matcher m = p.matcher(text);
    while (m.find()) {
        for (int i = 0; i < m.groupCount() + 1; i++)
            LOG.info(m.group(i));
    }
}

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You could have a look at Joda Money, it might offer a solution for your problem. Caution: it is still version 0.6

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java.util.Currency getSymbol()方法将帮助您获取货币符号

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