手動 fieldproperty XML 對映配置

註釋 @XmlElement ， @XmlAttribute 或 @XmlTransient 以及 javax.xml.bind.annotation 包中的其他內容允許程式設計師指定應該序列化哪些以及如何標記的欄位或屬性。

@XmlAccessorType(XmlAccessType.NONE) // we want no automatic field/property marshalling
public class ManualXmlElementsExample {
    
    @XmlElement
    private String field="field value";

    @XmlAttribute
    private String attribute="attr value";
    
    @XmlAttribute(name="differentAttribute")
    private String oneAttribute="other attr value";
    
    @XmlElement(name="different name")
    private String oneName="different name value";
    
    @XmlTransient
    private String transientField = "will not get serialized ever";
    
    
    @XmlElement
    public String getModifiedTransientValue() {
        return transientField.replace(" ever", ", unless in a getter");
    }
    
    public void setModifiedTransientValue(String val) {} // empty on purpose

    public static void main(String[] args) {
        try {
            JAXB.marshal(new ManualXmlElementsExample(), System.out);
        } catch (Exception e) {
            System.err.println("Exception occurred while writing in XML!");
        }
    }
}