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我試圖在歐元和美元之間的特定日期獲得匯率。問題是我很高興交換日期爲:LocalDate{year=2016, month=1, dayOfMonth=8}
,如果我在查詢中指定日期,則無關緊要。Java Money - 特定日期的貨幣兌換率
這裏是我的Maven依賴:
<dependency>
<groupId>javax.money</groupId>
<artifactId>money-api-bp</artifactId>
<version>1.0.1</version>
</dependency>
<dependency>
<groupId>org.javamoney</groupId>
<artifactId>moneta-bp</artifactId>
<version>1.1</version>
</dependency>
的源代碼:
public class Test {
public static void main(String[] args) {
ConversionQuery query = ConversionQueryBuilder.of()
.setProviderName("ECB")
.setBaseCurrency(Monetary.getCurrency("EUR"))
.setTermCurrency(Monetary.getCurrency("USD"))
.set(LocalDate.class, LocalDate.of(2017, Month.SEPTEMBER, 10))
.build();
final ExchangeRateProvider provider = getExchangeRateProvider(query);
final ExchangeRate rate1 = provider.getExchangeRate(query);
System.out.println(rate1);
ExchangeRateProvider ecbExchangeRateProvider = MonetaryConversions.getExchangeRateProvider("ECB");
ExchangeRate rate = ecbExchangeRateProvider.getExchangeRate("EUR", "USD");
System.out.println(rate);
}
}
而且從SOUT輸出:
sep. 11, 2017 9:58:29 AM org.javamoney.moneta.internal.convert.ECBAbstractRateProvider newDataLoaded
INFO: Loaded ECBCurrentRateProvider exchange rates for days:1
sep. 11, 2017 9:58:30 AM org.javamoney.moneta.internal.convert.ECBAbstractRateProvider newDataLoaded
INFO: Loaded ECBHistoric90RateProvider exchange rates for days:63
ExchangeRate [base=EUR, factor=1.0861, conversionContext=ConversionContext (
{provider=ECB, rateTypes=[DEFERRED], providerDescription=European Central Bank, days=1, org.javamoney.moneta.internal.convert.LocalDate=LocalDate{year=2016, month=1, dayOfMonth=8}, javax.money.convert.RateType=HISTORIC})]
ExchangeRate [base=EUR, factor=1.0861, conversionContext=ConversionContext (
{provider=ECB, rateTypes=[DEFERRED], providerDescription=European Central Bank, days=1, org.javamoney.moneta.internal.convert.LocalDate=LocalDate{year=2016, month=1, dayOfMonth=8}, javax.money.convert.RateType=HISTORIC})]
ExchangeRate [base=USD, factor=0.9207255317189946, conversionContext=ConversionContext (
{provider=ECB, rateTypes=[DEFERRED], providerDescription=European Central Bank, days=1, org.javamoney.moneta.internal.convert.LocalDate=LocalDate{year=2016, month=1, dayOfMonth=8}, javax.money.convert.RateType=HISTORIC})]
sep. 11, 2017 9:58:35 AM org.javamoney.moneta.internal.convert.ECBAbstractRateProvider newDataLoaded
INFO: Loaded ECBHistoricRateProvider exchange rates for days:4358
謝謝!
你正在輸入哪個'LocalDate'類? –
'LocaleDate'看起來像JDK8中的一個。爲什麼使用用JDK7顯式編譯的backport庫('-bp')? – vl4d1m1r4
我使用java.time.LocalDate作爲導入。因爲如果我在沒有bp的情況下使用依賴於money-api的結果,我得到null。而錯誤的導入並不能解釋爲什麼我在第二個例子中得到一些舊日。如果我改變:.set(org.javamoney.moneta.internal.convert.LocalDate.class,org.javamoney.moneta.internal.convert.LocalDate.from(Calendar.getInstance()))我得到同樣的問題。 – Kiki