Hi i'm get confused why this simple code not working, i have this simple class
@Entity @Table(name = "users") @XmlRootElement(name = "user") @XmlAccessorType(XmlAccessType.FIELD) public class User implements Serializable { @Id @GeneratedValue(strategy = GenerationType.AUTO) @Column(name = "id") protected Long id; @NotNull @Size(min = 3, max = 100, message = "{invalid.fullName}") @Column(name = "full_name", nullable = false, length = 100) @XmlElement(name = "fullName") private String fullName; @Temporal(TemporalType.TIMESTAMP) @Column(name = "last_login_date") @XmlElement(name = "lastLoginDate") @XmlJavaTypeAdapter(DateFormatterAdapter.class) private Date lastLoginDate; public Long getId() { return id;} public void setId(Long id) { this.id = id; } public String getFullName() { return fullName; } public void setFullName(String fullName) { this.fullName = fullName; } public Date getLastLoginDate() { return lastLoginDate; } public void setLastLoginDate(Date lastLoginDate) { this.lastLoginDate = lastLoginDate; } public User() { } } and this simple XmlAdapter as follow public class DateFormatterAdapter extends XmlAdapter<String, Date> { public DateFormatterAdapter() { } @Override public Date unmarshal(String v) throws Exception { return new Date(Long.parseLong(v)); } @Override public String marshal(Date v) throws Exception { return ((Long) v.getTime()).toString(); } } and a jersey restful service that return list of users as APPLICATION_JSON, in this scenario every things is ok, but DateFormatterAdapter class not been called and lastLoginDate not formatted as desired in result. but when i am doing this as follow manually,every things is Ok JAXBContext jc = JAXBContext.newInstance(User.class); Unmarshaller unmarshaller = jc.createUnmarshaller(); File xml = new File("e:/input.xml"); User foo = (User) unmarshaller.unmarshal(xml); foo.setLastLoginDate(new Date()); Marshaller marshaller = jc.createMarshaller(); marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true); marshaller.marshal(foo, System.out); i am using tomee 7.0.2 as my application server and eclipselink-2.7.0 -- Sent from: http://tomee-openejb.979440.n4.nabble.com/TomEE-Dev-f982480.html