那些遇到过的问题

jaxb解组日期

ket*_*eth 5 jaxb jaxb2

是否有任何简单的方法可以将日期解组为Java Date.

举一个例子,假设我们有下面的xml

<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<msg>
<type>SCH</type>
<msgName>SCHEvent</msgName>
<eventName>BST001</eventName>
<startDatetime>2012-09-12 11:00:00</startDatetime>
<endDatetime>2012-09-12 11:30:00</endDatetime>

</hl7msg>
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我想将这个xml解组到以下POJO中

@XmlRootElement(name = "msg")
public class SCHEvent {

Date startDatetime;
Date endDatetime;
----
}
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我试过上面的解组,我发现所有其他属性都被分配到这个pojo除了日期.我想我们可以使用XmlAdapter修复此问题,但这需要额外的类来创建.有没有简单的方法将这个xml文本日期转换为Java日期？

bdo*_*han 8

只要值与XML Schema dateTime格式匹配, JAXB(JSR-222)实现就会支持,java.util.Date但XmlAdapter请参阅: http: //blog.bdoughan.com/2011/01/jaxb-and-datetime-properties.html.示例与此格式不匹配,因此您需要使用XmlAdapter.

例 XmlAdapter

有关XmlAdapter看起来像什么的示例,请参阅我对类似Stack Overflow问题的回答:

应用于XmlAdapter所有实例java.util.Date

如果@XmlJavaTypeAdapter在包级别使用注释,则它将应用于该包中该类型的所有字段/属性.

JAXB和容错

在JAXB(JSR-222)专家组中,经历了相当大比例的文档与其对应的XML不匹配,因此我们默认决定每次遇到错误时都不会失败.您可以通过指定一个访问错误,ValidationEventHandler在Unmarshaller做类似下面看到的错误.

演示

package forum12400173;

import java.io.File;
import javax.xml.bind.*;

public class Demo {

    public static void main(String[] args) throws Exception {
        JAXBContext jc = JAXBContext.newInstance(SCHEvent.class);

        File xml = new File("src/forum12400173/input.xml");
        Unmarshaller unmarshaller = jc.createUnmarshaller();
        unmarshaller.setEventHandler(new ValidationEventHandler() {

            @Override
            public boolean handleEvent(ValidationEvent event) {
                event.getLinkedException().printStackTrace();
                return true;
            }

        });
        SCHEvent event = (SCHEvent)  unmarshaller.unmarshal(xml);
    }

}
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输出(JAXB-RI)

java.lang.IllegalArgumentException: 2012-09-12 11:00:00
    at com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl$Parser.parse(XMLGregorianCalendarImpl.java:2823)
    at com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl.<init>(XMLGregorianCalendarImpl.java:435)
    at com.sun.org.apache.xerces.internal.jaxp.datatype.DatatypeFactoryImpl.newXMLGregorianCalendar(DatatypeFactoryImpl.java:536)
    at com.sun.xml.internal.bind.DatatypeConverterImpl._parseDateTime(DatatypeConverterImpl.java:355)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl$4.parse(RuntimeBuiltinLeafInfoImpl.java:273)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl$4.parse(RuntimeBuiltinLeafInfoImpl.java:271)
    at com.sun.xml.internal.bind.v2.runtime.reflect.TransducedAccessor$CompositeTransducedAccessorImpl.parse(TransducedAccessor.java:232)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.LeafPropertyLoader.text(LeafPropertyLoader.java:50)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.text(UnmarshallingContext.java:499)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.SAXConnector.processText(SAXConnector.java:166)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.SAXConnector.endElement(SAXConnector.java:139)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:606)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1742)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2900)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:607)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:116)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:489)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:835)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1210)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:568)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:203)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:175)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:157)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:162)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:171)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:189)
    at forum12400173.Demo.main(Demo.java:22)
java.lang.IllegalArgumentException: 2012-09-12 11:30:00
    at com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl$Parser.parse(XMLGregorianCalendarImpl.java:2823)
    at com.sun.org.apache.xerces.internal.jaxp.datatype.XMLGregorianCalendarImpl.<init>(XMLGregorianCalendarImpl.java:435)
    at com.sun.org.apache.xerces.internal.jaxp.datatype.DatatypeFactoryImpl.newXMLGregorianCalendar(DatatypeFactoryImpl.java:536)
    at com.sun.xml.internal.bind.DatatypeConverterImpl._parseDateTime(DatatypeConverterImpl.java:355)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl$4.parse(RuntimeBuiltinLeafInfoImpl.java:273)
    at com.sun.xml.internal.bind.v2.model.impl.RuntimeBuiltinLeafInfoImpl$4.parse(RuntimeBuiltinLeafInfoImpl.java:271)
    at com.sun.xml.internal.bind.v2.runtime.reflect.TransducedAccessor$CompositeTransducedAccessorImpl.parse(TransducedAccessor.java:232)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.LeafPropertyLoader.text(LeafPropertyLoader.java:50)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallingContext.text(UnmarshallingContext.java:499)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.SAXConnector.processText(SAXConnector.java:166)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.SAXConnector.endElement(SAXConnector.java:139)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.endElement(AbstractSAXParser.java:606)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanEndElement(XMLDocumentFragmentScannerImpl.java:1742)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(XMLDocumentFragmentScannerImpl.java:2900)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(XMLDocumentScannerImpl.java:607)
    at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(XMLNSDocumentScannerImpl.java:116)
    at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(XMLDocumentFragmentScannerImpl.java:489)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:835)
    at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(XML11Configuration.java:764)
    at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(XMLParser.java:123)
    at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1210)
    at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:568)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal0(UnmarshallerImpl.java:203)
    at com.sun.xml.internal.bind.v2.runtime.unmarshaller.UnmarshallerImpl.unmarshal(UnmarshallerImpl.java:175)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:157)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:162)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:171)
    at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:189)
    at forum12400173.Demo.main(Demo.java:22)
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