java - JaxB gMonth 验证错误

Question

我有用于存储一个月的 XMLGregorianCalander

@XmlElement(name = "Month")
@XmlSchemaType(name = "gMonth")
protected XMLGregorianCalendar month;

解码时出现以下错误

XML validation error on response: cvc-datatype-valid.1.2.1: '--11--' is not a valid value for 'gMonth'.

据我所知，预期的格式是 '--11' , 我发现了相关问题 https://issues.apache.org/jira/browse/XERCESJ-1342但我不知道更改 gMonth 格式的解决方案

xsd 中的 gmonth 看起来像:

<xs:element name="Month" type="xs:gMonth"/>

是否已解决此问题或存在解决方法？

Answer 1

您可以使用 XmlAdapter来处理这个用例。

GMonthAdapter

package forum13872065;

import javax.xml.bind.annotation.adapters.XmlAdapter;
import javax.xml.datatype.*;

public class GMonthAdapter extends XmlAdapter<String, XMLGregorianCalendar> {

    DatatypeFactory dtf;

    public GMonthAdapter() {
         try {
            dtf = DatatypeFactory.newInstance();
        } catch (DatatypeConfigurationException e) {
            throw new RuntimeException(e);
        }
    }

    @Override
    public XMLGregorianCalendar unmarshal(String v) throws Exception {
        return dtf.newXMLGregorianCalendar(v);
    }

    @Override
    public String marshal(XMLGregorianCalendar v) throws Exception {
        String string = v.toXMLFormat();
        if(string.endsWith("--")) {
            return string.substring(0,4);
        }
        return string;
    }

}

根
@XmlJavaTypeAdapter注释用于引用 XmlAdapter .

package forum13872065;

import javax.xml.bind.annotation.*;
import javax.xml.bind.annotation.adapters.XmlJavaTypeAdapter;
import javax.xml.datatype.XMLGregorianCalendar;

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Root {

    @XmlElement(name = "Month")
    @XmlSchemaType(name = "gMonth")
    @XmlJavaTypeAdapter(GMonthAdapter.class)
    protected XMLGregorianCalendar month;

}

演示

下面是一些演示代码来证明一切正常。

package forum13872065;

import javax.xml.bind.*;
import javax.xml.datatype.DatatypeFactory;

public class Demo {

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

        Root root = new Root();
        DatatypeFactory dtf = DatatypeFactory.newInstance();
        root.month = dtf.newXMLGregorianCalendar("--11");

        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(root, System.out);
    }

}

输出

下面是运行演示代码的输出。

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root>
    <Month>--11</Month>
</root>