我正在尝试将带有货币金额字段的 POJO 序列化为字符串,但生成的输出不遵循规定的形状格式。
// org.javamoney:moneta:1.1
// com.fasterxml.jackson.core:jackson-annotations:2.7.0
@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonPropertyOrder({
"CBNOT_CHARGEBACK_AMOUNT"
})
public class TestMonetaryAmountJsonSerialization {
@JsonProperty("CBNOT_CHARGEBACK_AMOUNT")
@NotNull
@JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "¤#,##0.00", locale = "en_US")
private final MonetaryAmount chargebackAmount = Monetary.getDefaultAmountFactory().setCurrency("USD").setNumber(12.50).create();
private static final ObjectMapper mapper = new ObjectMapper();
@Test
public void testThis() throws JsonProcessingException{
String json = mapper.writeValueAsString(this);
System.out.println(json);
Assert.assertEquals("{"CBNOT_CHARGEBACK_AMOUNT":"¤12.50"}",json);
}
}
OUTPUT: {"CBNOT_CHARGEBACK_AMOUNT":{"currency":{"context":{"empty":false,"providerName":"java.util.Currency"},"defaultFractionDigits":2,"currencyCode":"USD","numericCode":840},"number":12.5,"factory":{"defaultMonetaryContext":{"precision":0,"fixedScale":false,"amountType":"org.javamoney.moneta.Money","maxScale":63,"empty":false,"providerName":null},"maxNumber":null,"minNumber":null,"amountType":"org.javamoney.moneta.Money","maximalMonetaryContext":{"precision":0,"fixedScale":false,"amountType":"org.javamoney.moneta.Money","maxScale":-1,"empty":false,"providerName":null}},"context":{"precision":0,"fixedScale":false,"amountType":"org.javamoney.moneta.Money","maxScale":63,"empty":false,"providerName":null},"numberStripped":12.5,"zero":false,"negative":false,"negativeOrZero":false,"positive":true,"positiveOrZero":true}}
知道我做错了什么吗? 我把厨房水槽扔在这里,只是为了说明目的和紧凑的演示。
JsonFormat 是 Jackson 定义的几个(反(序列化程序中使用的注释(例如 DateTimeSerializerBase、NumberSerializers.Base 和其他一些完整列表(,它不是将任何对象转换为字符串的通用机制:
与大多数其他杰克逊注释不同,注释没有 具体的通用解释:相反,效果取决于数据类型 被注释的属性(或更具体地说,反序列化程序和 正在使用的序列化程序(。
除非您为MonetaryAmount
创建自定义序列化程序或使用使用此注释(及其 pattern
属性(的序列化程序,否则指定它不会产生任何效果,但如果创建自定义序列化程序,则可能不需要这种级别的灵活性来为不同的字段指定不同的模式,并且可能只使用固定的 MonetaryAmountFormat 或从 MonetaryAmount
对象构建必要的字符串,否则
例如
@JsonInclude(JsonInclude.Include.NON_NULL)
@JsonPropertyOrder({
"CBNOT_CHARGEBACK_AMOUNT"
})
public class TestMonetaryAmountJsonSerialization {
@JsonProperty("CBNOT_CHARGEBACK_AMOUNT")
@NotNull
private final MonetaryAmount chargebackAmount = Monetary.getDefaultAmountFactory().setCurrency("USD").setNumber(12.50).create();
private static final ObjectMapper mapper = new ObjectMapper();
static {
SimpleModule monetaryModule = new SimpleModule();
monetaryModule.addSerializer(MonetaryAmount.class, new MonetaryAmountSerializer());
mapper.registerModule(monetaryModule);
}
@Test
public void testThis() throws JsonProcessingException {
String json = mapper.writeValueAsString(this);
System.out.println(json);
Assert.assertEquals("{"CBNOT_CHARGEBACK_AMOUNT":"$12.50"}", json);
}
public static class MonetaryAmountSerializer extends JsonSerializer<MonetaryAmount> {
public void serialize(MonetaryAmount monetaryAmount,
JsonGenerator jsonGenerator,
SerializerProvider serializerProvider) throws IOException {
StringBuilder sb = new StringBuilder();
MonetaryAmountDecimalFormatBuilder
.of("¤#,##0.00").withCurrencyUnit(monetaryAmount.getCurrency()).build()
.print(sb, monetaryAmount);
jsonGenerator.writeString(sb.toString());
}
}
}