JAXB を使用して long プリミティブ型をマーシャリングするために、XmlJavaTypeAdapter
非 String 型を String に適応させる @ アノテーションを使用しました。長いタイプのエラーをスローしますが。なぜそうなのですか?long
id 属性をマーシャリングするにはどうすればよいですか?
ユーザー.java
class User {
@XmlID
@XmlJavaTypeAdapter(WSLongAdapter.class)
private long id;
// Other variables
// Getter & Setter method
}
WSLongAdapter.java
public class WSLongAdapter extends XmlAdapter<String, Long>{
@Override
public String marshal(Long id) throws Exception {
if(id==null) return "" ;
return id.toString();
}
@Override
public Long unmarshal(String id) throws Exception {
return Long.parseLong(id);
}
}
MarshallTest.java
public static void main(String[] args) {
try{
JAXBContext jaxbContext= JAXBContext.newInstance(User.class);
Marshaller marshaller = jaxbContext.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FRAGMENT, true);
OutputStreamWriter writer = new OutputStreamWriter(System.out);
// Manually open the root element
writer.write("<user>");
// Marshal the objects out individually
marshaller.marshal(new User(), writer);
// Manually close the root element
writer.write("</user>");
writer.close();
}
catch (Exception e) {
e.printStackTrace();
}
}
エラー:
com.sun.xml.bind.v2.runtime.IllegalAnnotationsException: 4 counts of IllegalAnnotationExceptions
Adapter com.v4common.shared.util.other.WSLongAdapter is not applicable to the field type long.
this problem is related to the following location:
at @javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter(type=class javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter$DEFAULT, value=class com.v4common.shared.util.other.WSLongAdapter)
at private long com.v4common.shared.beans.usermanagement.User.id
at com.v4common.shared.beans.usermanagement.User
Property "id" has an XmlID annotation but its type is not String.
this problem is related to the following location:
at private long com.v4common.shared.beans.usermanagement.User.id
at com.v4common.shared.beans.usermanagement.User
There are two properties named "id"