[英]JAXB: Dealing the with Root Element
對於不同的Rest調用,我具有不同的Response
類。 但是它們都處理同一個Entity
。 最初我是因為沒有從Response類中告訴JaxB有關Entity類。 通過使用@XmlSeeAlso({Entity.class})
。 現在,我試圖在Response
類中修復根元素名稱。
Issue1:
@XmlRootElement(name="?")
@XmlSeeAlso({Entity.class})
public class FindAllResponse
extends ListResponse<Entity>
{
/**
* serial version uid
*/
private static final long serialVersionUID = xxx;
}
預期的響應是
<Response> <Entities> <Entity></Entity> </Entities> <Response>
如何將<Response><Entities>
根添加到上述響應類。
Issue2:
@XmlRootElement(name="?")
@XmlSeeAlso({Entity.class})
public class FindEntityResponse
extends Response<JobType>
{
@JsonUnwrapped
public Entity getValue() {
return super.getValue();
}
}
在這種情況下,預期響應沒有任何根元素。 預期響應xml只是從<Entity></Entity>
。
@XmlRootElement
針對問題1使用@XmlTransient
和@XmlRootElement
進行嘗試,但沒有運氣。
您需要將Entity
類包裝在分別定義Response
和Entities
根元素的類中。
基本的東西:
// this class will represent your Response element and all attributes
@XmlRootElement(name="Response")
@XmlAccessorType(XmlAccessType.FIELD)
public class Response {
@XmlElement(name="Entities")
private Entities myEntities;
public Response() {
myEntities = new Entities();
}
public Entities getMyEntities() { return myEntities; }
public void setMyEntities(Entities entities) { this.myEntities = entities; }
}
// this class will represent the collection of Entities
@XmlRootElement(name="Entities")
@XmlAccessorType(XmlAccessType.FIELD)
public class Entities {
@XmlElement(name="Entity")
private List<Entity> entities;
public Entities() {
entities = new ArrayList<Entity>();
}
public List<Entity> getEntities() { return this.entities; }
public void setEntities(List<Entity> entities) { this.entities = entities; }
}
// a simple Entity class (I don't know what yours is)
@XmlRootElement(name="Entity")
@XmlAccessorType(XmlAccessType.FIELD)
public class Entity {
@XmlAttribute(name="id")
private String id;
public Entity() {}
public Entity(String id) { setId(id); }
public String getId() { return id; }
public void setId(String id) { this.id = id; }
}
最后,一個簡單的測試:
public class Test {
public static void main(String[] args) throws Exception {
Response r = new Response();
Entities e = new Entities();
e.getEntities().add(new Entity("1"));
e.getEntities().add(new Entity("2"));
e.getEntities().add(new Entity("3"));
r.setMyEntities(e);
JAXBContext context = JAXBContext.newInstance(Response.class);
Marshaller m = context.createMarshaller();
m.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
m.marshal(r, System.out);
}
}
產生以下輸出:
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<Response>
<Entities>
<Entity id="1"/>
<Entity id="2"/>
<Entity id="3"/>
</Entities>
</Response>
我認為,這應該使您更接近所追求的目標。
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