JSR-354 MonetaryAmountFormat对于除$，€或£以外的其他货币符号不起作用的两种方式

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问题描述

    Locale LANG = Locale.CHINA;  // also tried new Locale("pl", "PL");

    final MonetaryAmountFormat format = MonetaryFormats.getAmountFormat(
            AmountFormatQueryBuilder.of(LANG)
                    .set(CurrencyStyle.SYMBOL)
                    .set("pattern", "#,##0.00### ¤")
                    .build()
    );
    final String formatted = format.format(Money.of(new BigDecimal("1234.56"), Monetary.getCurrency(LANG)));

    System.out.println(formatted);

    System.out.println(format.parse(formatted).getNumber());

这应该可行，因为我正在来回转换相同的对象.除非我弄错了，并且换算为美元，欧元或英镑以外的其他货币，汇率不是双向的.

This should work since I'm converting same object back and forth. Unless I got something wrong and converter is not two-way for other currencies than $, € or £.

最后一行崩溃:

Exception in thread "main" java.lang.IllegalArgumentException: Invalid error index > input.length
at javax.money.format.MonetaryParseException.<init>(MonetaryParseException.java:56)
at org.javamoney.moneta.internal.format.AmountNumberToken.parse(AmountNumberToken.java:140)
at org.javamoney.moneta.internal.format.DefaultMonetaryAmountFormat.parse(DefaultMonetaryAmountFormat.java:190)
at test.main(test.java:27)

如果提供的语言环境与$，€或£之一不相关，则会发生这种情况.例如，此代码适用于Locale.US，但适用于Locale.CHINA和new Locale("pl", "PL")崩溃.因此，这不仅是自定义定义的Locale的问题，还是静态定义的问题.

This happens if provided locale is not associated with one of $, € or £. For instance this code will work for Locale.US, but will crash for Locale.CHINA as well as with new Locale("pl", "PL"). So this is not only problem with custom defined Locale but those statically predefined as well.

我在内部包装中挖了一点，发现了org.javamoney.moneta.internal.format.CurrencyToken.parse(CurrencyToken.java:196)，它看起来像:

I have dug a little into the internal package and found org.javamoney.moneta.internal.format.CurrencyToken.parse(CurrencyToken.java:196), which looks like:

case SYMBOL:
    if (token.startsWith("$")) {
        cur = Monetary.getCurrency("USD");
        context.consume("$");
    } else if (token.startsWith("€")) {
        cur = Monetary.getCurrency("EUR");
        context.consume("€");
    } else if (token.startsWith("£")) {
        cur = Monetary.getCurrency("GBP");
        context.consume("£");
    } else {
        cur = Monetary.getCurrency(token);
        context.consume(token);
    }
    context.setParsedCurrency(cur);
    break;

有什么方法可以使我的代码适用于美元，欧元或英镑以外的货币?

Is there any way to make my code above work for currencies other than $, € or £?

例如，我尝试了一些其他的事情，例如Locale.CANADA，它们也有$作为货币符号，因此它可以执行而不会失败，但是返回错误的数据

I have try few more things for instance provided Locale.CANADA they also have $ as currency symbol so it execute without failure but returns wrong data

    Locale LANG = Locale.CANADA;

    final MonetaryAmountFormat format = MonetaryFormats.getAmountFormat(
            AmountFormatQueryBuilder.of(LANG)
                    .set(CurrencyStyle.SYMBOL)
                    .set("pattern", "#,##0.00### ¤")
                    .build()
    );
    final String formatted = format.format(Money.of(new BigDecimal("1234.56"), Monetary.getCurrency(LANG)));

    System.out.println(formatted);

    System.out.println(format.parse(formatted).getCurrency().getCurrencyCode());

最后一行返回USD而不是CAD，这是if-else为$执行的操作.我认为它也错误地假设符号-货币是一对一的映射.

last line return USD instead of CAD which is what this if-else does for $. I think it also wrongly assumes that symbol - currency is one to one mapping.

MonetaryAmountFormat对于除

JSR-354 MonetaryAmountFormat对于除$，€或£以外的其他货币符号不起作用的两种方式

问题描述

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