爲什麼澤西拒絕編組泛型？

Question

我有一個基類泛型泛型類型屬性和幾個類繼承它。類似的東西：

public abstract class BaseClass<T extends Number> { 
    @XmlAnyElement 
    public T getId() { return id; } 
    private T id ; // init for hibernate bug workaround 
..... 
} 

@XmlRootElement 
public class A extends BaseClass<Integer> { 
    private String name; 
    private String error; 
    private String url; 

    public String getError() { return error; } 
    public void setError(String error) { this.error = error; } 

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

    public void setUrl(String url) { this.url = url; } 
    public String getUrl() { return url; } 
} 

當新澤西試圖編組它拋出：

javax.xml.bind.MarshalException 
    - with linked exception: 
    [com.sun.istack.SAXException2: unable to marshal type "java.lang.Integer" as an  element because it is missing an @XmlRootElement annotation] 
at com.sun.xml.bind.v2.runtime.MarshallerImpl.write(MarshallerImpl.java:318) 
at com.sun.xml.bind.v2.runtime.MarshallerImpl.marshal(MarshallerImpl.java:172) 
at com.sun.jersey.json.impl.JSONMarshallerImpl.marshal(JSONMarshallerImpl.java:94) 
at com.sun.jersey.json.impl.BaseJSONMarshaller.marshallToJSON(BaseJSONMarshaller.java:103) 
at com.sun.jersey.json.impl.BaseJSONMarshaller.marshallToJSON(BaseJSONMarshaller.java:91) 
    ...... 

我XmlRootElement將註釋不能添加到整數，所以我應該怎麼辦？

Answer 1

您應該嘗試將@XmlRootElement註釋添加到您的BaseClass。