我正在尝试创建XmlAdapter
,其中包含XMLGregorianCalendar
并输出XMLGregorianCalendar
。目的是简单地在解组数据时从元素中删除时区数据。
看起来像这样:
public class TimezoneRemoverAdapter extends XmlAdapter<XMLGregorianCalendar, XMLGregorianCalendar> {
public XMLGregorianCalendar unmarshal(XMLGregorianCalendar xgc) {
if(xgc == null) {
return null;
}
xgc.setTimezone(DatatypeConstants.FIELD_UNDEFINED);
return xgc;
}
public XMLGregorianCalendar marshal(XMLGregorianCalendar xgc) {
return xgc;
}
}
这适用于以下代码:
public class FooElement {
@XmlElement(name="bar-date")
@XmlJavaTypeAdapter(TimezoneRemoverAdapter.class)
@XmlSchemaType(name = "date")
protected XMLGregorianCalendar barDate;
}
不幸的是,当我使用jaxb-bindings.xml
文件生成代码时,上面的代码如下所示:
public class FooElement {
@XmlElement(name="bar-date", type=java.lang.String.class)
@XmlJavaTypeAdapter(TimezoneRemoverAdapter.class)
@XmlSchemaType(name = "date")
protected XMLGregorianCalendar barDate;
}
它将类型设置为String
,因此我的上述方法不起作用。类型String
设置会覆盖它应该是XMLGregorianCalendar
类型。我可以手动更改它,但我不必记住每次重新生成jaxb文件时都要更新它。有没有人知道是否有手动设置@XmlElement
类型或忽略它的选项?
以下是jaxb-bindings.xml
文件的相关部分:
<jxb:bindings node=".//xs:element[@name=bar-date]">
<jxb:property>
<jxb:baseType>
<jxb:javaType name="javax.xml.datatype.XMLGregorianCalendar" adapter="foo.bar.TimezoneRemoverAdapter" />
</jxb:baseType>
</jxb:property>
</jxb:bindings>
答案 0 :(得分:1)
总结:
yyyy-MM-ddXXX
格式)XXX
部分(日期本身不发布任何时区,日期只是一个数字)所以这可能是一个示例模式:
<?xml version="1.0" encoding="UTF-8"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" elementFormDefault="qualified">
<element name="foo">
<complexType>
<sequence>
<element name="bar" type="date" minOccurs="1" maxOccurs="1"/>
</sequence>
</complexType>
</element>
</schema>
这可能是一个样本数据:
<?xml version="1.0" encoding="UTF-8"?>
<foo xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="foo.xsd">
<bar>2014-01-01+06:00</bar>
</foo>
这是JAXB注释类
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Foo implements Serializable
{
private static final long serialVersionUID = 1L;
@XmlElement(name = "bar")
@XmlJavaTypeAdapter(DateAdapter.class)
@XmlSchemaType(name = "date")
private Date bar;
// getters/setters
}
这是日期适配器
public class DateAdapter extends XmlAdapter<String, Date>
{
@Override
public String marshal(Date date)
{
DateFormat df = new SimpleDateFormat("yyyy-MM-dd");
df.setTimeZone(TimeZone.getTimeZone("GMT"));
return df.format(date);
}
@Override
public Date unmarshal(String date) throws ParseException
{
DateFormat df = new SimpleDateFormat("yyyy-MM-ddXXX");
return df.parse(date);
}
}
这是主要的,验证架构:
public static void main(String[] args) throws JAXBException, SAXException
{
JAXBContext context = JAXBContext.newInstance(Foo.class);
SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);
Schema schema = sf.newSchema(Foo.class.getResource("/foo.xsd"));
Unmarshaller unmarshaller = context.createUnmarshaller();
unmarshaller.setSchema(schema);
Foo foo = (Foo) unmarshaller.unmarshal(Foo.class.getResource("/foo.xml"));
System.out.println("unmarshalled: " + foo.getBar());
Marshaller marshaller = context.createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
marshaller.setProperty(Marshaller.JAXB_NO_NAMESPACE_SCHEMA_LOCATION, "foo.xsd");
marshaller.setSchema(schema);
marshaller.marshal(foo, System.out);
}
这是输出,时区已被删除,日期表示已明显改变
unmarshalled: Tue Dec 31 19:00:00 CET 2013
<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<foo xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="foo.xsd">
<bar>2013-12-31</bar>
</foo>
也许这个日期表示更改不是您所期望的,但这不是JAXB关注的问题,所代表的日期没有改变。
我忘记了绑定以反转生成Foo:
<jaxb:bindings xmlns:jaxb="http://java.sun.com/xml/ns/jaxb" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:xjc="http://java.sun.com/xml/ns/jaxb/xjc" jaxb:extensionBindingPrefixes="xjc" jaxb:version="2.0">
<jaxb:globalBindings>
<xjc:javaType name="java.util.Date" xmlType="xsd:date" adapter="aaa.DateAdapter" />
</jaxb:globalBindings>
</jaxb:bindings>
我无法理解:
XmlGregorianCalendar
?marshal
/ unmarshal
(serialize
/ deserialize
)加入相同的数据结构?和
java.util.Date
marshal
/ unmarshal
应该始终涉及String
s(至少对于XML)然而
public class DateAdapter extends XmlAdapter<String, Date>
{
@Override
public String marshal(Date date)
{
DateFormat df = DateFormat.getDateTimeInstance();
df.setTimeZone(TimeZone.getTimeZone("GMT"));
return df.format(date);
}
@Override
public Date unmarshal(String date) throws ParseException
{
DateFormat df = DateFormat.getDateTimeInstance();
df.setTimeZone(TimeZone.getTimeZone("GMT"));
return df.parse(date);
}
public static void main(String[] args) throws ParseException
{
DateAdapter adapter = new DateAdapter();
String str = adapter.marshal(new Date());
System.out.println(str); // 16-dic-2013 10.02.09 --> to gmt
Date date = adapter.unmarshal(str);
System.out.println(date); // Mon Dec 16 11:02:09 CET 2013 --> correct, i'm gmt+1
}
}
答案 1 :(得分:1)
在您的情况下,您必须以不同的方式指定java类型:
<jxb:javaType
name="javax.xml.datatype.XMLGregorianCalendar"
xmlType="xs:date"
printMethod="foo.bar.TimezoneRemoverAdapter.marshall"
parseMethod="foo.bar.TimezoneRemoverAdapter.unmarshall"
/>
它适用于我,我做了类似的更多适配器:
<jaxb:globalBindings>
<xjc:serializable uid="12343" />
<jaxb:javaType name="java.util.Date" xmlType="xs:date" printMethod="com.foo.DateAdapter.printDate" parseMethod="com.foo.DateAdapter.parseDate" />
<jaxb:javaType name="java.util.Date" xmlType="xs:dateTime" printMethod="com.foo.DateAdapter.printDate" parseMethod="com.foo.DateAdapter.parseDate" />
<jaxb:javaType name="java.util.Date" xmlType="xs:time" printMethod="com.foo.TimeAdapter.printTime" parseMethod="com.foo.TimeAdapter.parseTime" />
</jaxb:globalBindings>
我将上述绑定作为globalBindings
放在具有.xjb
扩展名的不同文件中,并在需要的任何地方使用它。