我有包裝類：@Data@NoArgsConstructor@AllArgsConstructorpublic class Wrapper { private String id; private int number; private Element internal;}我有內部類：@XmlRootElement@Data@AllArgsConstructor@NoArgsConstructorpublic class Payment { private BigDecimal amount; private String account;}我創建 ，將其轉換為 并設置為 .之后，我將包裝器轉換為字符串，使用Json JacksonPaymentorg.w3c.dom.ElementWrapper之后，我嘗試以另一種方式轉換 - 字符串到對象并得到錯誤。public class Main { public static void main(String[] args) throws JAXBException, ParserConfigurationException, IOException { ObjectMapper mapper = new ObjectMapper(); Document document = DocumentBuilderFactory.newInstance().newDocumentBuilder().newDocument(); JAXBContext context = JAXBContext.newInstance(Payment.class); Marshaller marshaller = context.createMarshaller(); //create paymant Payment payment = new Payment(BigDecimal.valueOf(100), "666"); //convert to Element marshaller.marshal(payment, document); Element element = document.getDocumentElement(); //set Paymant as Element to Wrapper Wrapper wrapper = new Wrapper("123321", 987, element); //convert Wrapper to string String wrapperAsString = mapper.writeValueAsString(wrapper); System.out.println(wrapperAsString); //convert the other way Wrapper restoreWrapper = mapper.readValue(wrapperAsString, Wrapper.class); }}當我將包裝器轉換為字符串時，我得到這個結果：{ "id": "123321", "number": 987, "internal": "<?xml version=\"1.0\" encoding=\"UTF-16\"?>\n<payment><account>666</account><amount>100</amount></payment>"}
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您有兩種選擇：
將類型更改為 或 。
internalDocumentNode編寫自定義 deserialiser，它將在行中執行與您相同的操作：
Element element = document.getDocumentElement();
Custom deserialiser：
class ElementDeserializer extends DOMDeserializer<Element> {
private static final long serialVersionUID = 1L;
public ElementDeserializer() {
super(Element.class);
}
@Override
public Element _deserialize(String value, DeserializationContext ctxt)
throws IllegalArgumentException {
return parse(value).getDocumentElement();
}
}
您可以按如下方式注冊：
SimpleModule elementModule = new SimpleModule();
elementModule.addDeserializer(Element.class, new ElementDeserializer());
ObjectMapper mapper = new ObjectMapper();
mapper.registerModule(elementModule);
但我建議留在定制的除甲醚 - 和 - .Documencom.fasterxml.jackson.databind.ext.DOMDeserializer.DocumentDeserializerNodecom.fasterxml.jackson.databind.ext.DOMDeserializer.NodeDeserializer
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