JAXB将1个XML标记映射到2个变量

我试图使用一个类来映射我从XML请求得到的响应。 但xml响应有所不同，具体取决于某些设置。 例如，在响应中，我得到标签“owner”，其中填充了所有者对象的ID。 如果我在我的请求中添加一个设置，我将返回完整的所有者数据，如firstname和lastname。 现在我想根据响应将owner标记映射到String变量或Class。

示例：

@XmlAccessorType(XmlAccessType.FIELD) @XmlRootElement(name = "domain") public class Response { @XmlElement private String name; @XmlElement(name = "owner") private String ownerSimple; @XmlElement(name = "owner") private Owner ownerComplex; } @XmlRootElement(name = "ownerc") public class OwnerC { @XmlElement int id; @XmlElement String fname; @XmlElement String lname; } 

要映射的XML：

  Foo 1234    Foo   1234 Jon Doe   

Answer 1

您可以使用@XmlAnyElement(lax=true)来处理此用例。 此批注允许您将任何XML解组为Java对象（DOM Node ）。 在第二步中，可以将Node解组为所需的对象

响应

 @XmlAccessorType(XmlAccessType.FIELD) @XmlRootElement(name = "domain") public class Response { @XmlElement private String name; @XmlAnyElement(lax=true) private Object owner; private String ownerSimple; @XmlTransient private Owner ownerComplex; 

所有者

 @XmlAccessorType(XmlAccessType.FIELD) @XmlRootElement(name = "owner") public class Owner { @XmlElement int id; @XmlElement String fname; @XmlElement String lname; 

解组

 //Unmarshaller. Step 1 - Decodes Response and set a DOM Node at Owner //Important. Owner class must not be present in JAXB context, letting next step to decode the object properly. //Owner variable at Response class is annotated with @XmlTransient JAXBContext jaxbContext = JAXBContext.newInstance(Response.class); Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller(); Response response = (Response) jaxbUnmarshaller.unmarshal(reader); //Unmarshaller. Step 2. Convert Node to the suitable Object //Considering both cases, simple-> String complex -> Owner Object. String ownerSimple = ((Node)response.getOwner()).getFirstChild().getNodeValue(); if (ownerSimple != null){ response.setOwnerSimple(ownerSimple); } else { JAXBContext jaxbContextOwner = JAXBContext.newInstance(Owner.class); Unmarshaller jaxbUnmarshallerOwner = jaxbContextOwner.createUnmarshaller(); Owner ownerComplex = (Owner) jaxbUnmarshallerOwner.unmarshal((Node)response.getOwner()); response.setOwnerComplex(ownerComplex); } //Marshaller to system.out. Your object is well mapped in both cases Marshaller marshaller = jaxbContext.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); marshaller.marshal(rx, System.out);