java - Camel Bindy 不适本地转换 BigDecimal

Question

我有以下使用Camels Bindy的示例，但最终它会引发断言错误，因为bindy以错误的方式转换BigDecimal(使用逗号而不是点作为数字分隔符)。

这段代码有什么问题？

public class PurchaseOrderBindyTest extends TestCase {

    @Test
    public void testBindy() throws Exception {
        CamelContext context = new DefaultCamelContext();
        context.addRoutes(createRoute());
        context.start();

        MockEndpoint mock = context.getEndpoint("mock:result", MockEndpoint.class);
        mock.expectedBodiesReceived("Camel in Action,39.95,1\n");

        PurchaseOrder order = new PurchaseOrder();
        order.setAmount(1);
        order.setPrice(new BigDecimal("39.95"));
        order.setName("Camel in Action");

        ProducerTemplate template = context.createProducerTemplate();
        template.sendBody("direct:toCsv", order);

        mock.assertIsSatisfied();
    }

    public RouteBuilder createRoute() {
        return new RouteBuilder() {
            public void configure() throws Exception {
                from("direct:toCsv")
                        .marshal().bindy(BindyType.Csv, "camelinaction.bindy")
                        .to("mock:result");
            }
        };
    }
}

型号

@CsvRecord(separator = ",", crlf = "UNIX")
public class PurchaseOrder {

    @DataField(pos = 1)
    private String name;

    @DataField(pos = 2, precision = 2)
    private BigDecimal price;

    @DataField(pos = 3)
    private int amount;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public BigDecimal getPrice() {
        return price;
    }

    public void setPrice(BigDecimal price) {
        this.price = price;
    }

    public int getAmount() {
        return amount;
    }

    public void setAmount(int amount) {
        this.amount = amount;
    }
}

断言错误

java.lang.AssertionError: mock://result Body of message: 0. Expected: <Camel in Action,39.95,1
> but was: <Camel in Action.39,95.1
>

Answer 1

我的测试通过了，没有任何问题。有趣的是，在你的例子中，“.”和“，”似乎颠倒了。

Camel 使用 java.text.DecimalFormat 类来确定区域设置，如下所示:

Locale def = Locale.getDefault(Locale.Category.FORMAT);

您可以按如下方式重置区域设置默认值:

Locale.setDefault(new Locale ("en", "US"));

如果您不想重置默认区域设置，可以按如下方式设置区域设置:

BindyCsvDataFormat bindy = new BindyCsvDataFormat(PurchaseOrder.class);
bindy.setLocale(Locale.US.getCountry());

from("direct:toCsv")
    .marshal(bindy)
    ...

在这种情况下，Camel 会重置 AbstractNumberFormat 中的十进制格式符号，如下所示:

if (locale != null) {
    this.format.setDecimalFormatSymbols(DecimalFormatSymbols.getInstance(locale));
}