我無法讓JAXB解封Resteasy JAX-RS服務器應用程序中的時間戳。我的課看起來像這樣：@XmlAccessorType(XmlAccessType.NONE)@XmlRootElement(name = "foo")public final class Foo {    // Other fields omitted    @XmlElement(name = "timestamp", required = true)    protected Date timestamp;    public Foo() {}    public Date getTimestamp() {        return timestamp;    }    public String getTimestampAsString() {        return (timestamp != null) ? new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(timestamp) : null;    }    public void setTimestamp(final Date timestamp) {        this.timestamp = timestamp;    }    public void setTimestamp(final String timestampAsString) {        try {            this.timestamp = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").parse(timestampAsString);        } catch (ParseException ex) {            this.timestamp = null;        }    }}有任何想法嗎？謝謝。