Java JAXB怎么处理日期格式 @XmlJavaTypeAdapter

public class LocalDateTimeAdapter extends XmlAdapter {
    private static final DateTimeFormatter FORMATTER = DateTimeFormatter.ofPattern("yyyy-MM-dd HH:mm:ss");

    @Override
    public LocalDateTime unmarshal(String s) throws Exception {
        if (s == null || s.trim().isEmpty()) return null;
        return LocalDateTime.parse(s.trim(), FORMATTER);
    }

    @Override
    public String marshal(LocalDateTime dateTime) throws Exception {
        return (dateTime == null) ? null : dateTime.format(FORMATTER);
    }
}

public class Order {
    @XmlElement
    @XmlJavaTypeAdapter(LocalDateTimeAdapter.class)
    private LocalDateTime createTime;
    // getter/setter...
}

public class DateAdapter extends XmlAdapter {
    private static final SimpleDateFormat FORMAT = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
    static { FORMAT.setTimeZone(TimeZone.getTimeZone("GMT+8")); }

    @Override
    public Date unmarshal(String s) throws Exception {
        if (s == null || s.trim().isEmpty()) return null;
        return FORMAT.parse(s.trim());
    }

    @Override
    public String marshal(Date date) throws Exception {
        return (date == null) ? null : FORMAT.format(date);
    }
}

Map props = new HashMap<>();
props.put("com.sun.xml.bind.defaultNamespacePrefix", "ns");
JAXBContext ctx = JAXBContext.newInstance(Order.class);
// 注册全局 adapter（需配合 @XmlJavaTypeAdapters）
// 或改用 Jakarta EE 方式：通过 package-info.java 声明

@XmlJavaTypeAdapters({
    @XmlJavaTypeAdapter(value = LocalDateTimeAdapter.class, type = LocalDateTime.class),
    @XmlJavaTypeAdapter(value = DateAdapter.class, type = Date.class)
})
package com.example.model;