Java Money被挂起汇率

Question

我正在尝试使用java money-api和moneta存储库进行简单的货币转换。

<dependency>
    <groupId>javax.money</groupId>
    <artifactId>money-api</artifactId>
    <version>1.1</version>
</dependency>
<dependency>
    <groupId>org.javamoney</groupId>
    <artifactId>moneta</artifactId>
    <version>1.4.2</version>
</dependency>

IMFHistoricRateProvider imf = new IMFHistoricRateProvider();

LocalDate now = LocalDate.now();
ExchangeRate exr = null;
long start = System.currentTimeMillis();
LocalDate date = LocalDate.parse("2021-05-25", DateTimeFormatter.ISO_LOCAL_DATE);
exr = imf.getExchangeRate(ConversionQueryBuilder.of().setBaseCurrency("EUR").setTermCurrency("USD").set(LocalDate.class, date).build());
System.out.println(exr.getFactor() + " ==" + (System.currentTimeMillis()-start));

在这里，exr.getFactor()方法给出了给定日期的汇率，但它在一个状态下挂起了几个小时。

它挂起的PF日志。

May 27, 2021 4:59:26 PM org.javamoney.moneta.spi.loader.LoadDataLoaderService execute
INFO: Read data from: [https://www.imf.org/external/np/fin/data/rms_five.aspx?tsvflag=Y]
May 27, 2021 4:59:26 PM org.javamoney.moneta.convert.imf.IMFAbstractRateProvider newDataLoaded
INFO: Loaded IMFHistoricRateProvider exchange rates for days:50
May 27, 2021 4:59:26 PM org.javamoney.moneta.spi.loader.LoadDataLoaderService execute
INFO: New data successfully loaded from: [https://www.imf.org/external/np/fin/data/rms_five.aspx?tsvflag=Y]

它应该给出从欧元到美元的汇率从过去的X当地日期。

参考：https://dzone.com/articles/looking-java-9-money-and (汇率)

Answer 1

我已经将依赖从moneta更改为更具体的汇率提供程序moneta-convert-ecb

<dependency>
    <groupId>javax.money</groupId>
    <artifactId>money-api</artifactId>
    <version>1.1</version>
</dependency>
<dependency>
    <groupId>org.javamoney.moneta</groupId>
    <artifactId>moneta-core</artifactId>
    <version>1.4.2</version>
</dependency>
<dependency>
    <groupId>org.javamoney.moneta</groupId>
    <artifactId>moneta-convert-ecb</artifactId>
    <version>1.4.2</version>
</dependency>

也改变了

IMFHistoricRateProvider imf = new IMFHistoricRateProvider();

至

ExchangeRateProvider ecb = new ECBHistoricRateProvider();

尽管这一解决办法奏效了，但这只是将提供者从国际货币基金组织改为欧洲央行。

注:国际货币基金组织的表现仍然是一样的。