Question

我有以下java模型：

public class Container {
    public X x;
    public Y y;
}
public class X {
    public String test;
}
public class Y {}

并希望映射以下文档：

<?xml version="1.0" encoding="UTF-8"?>
<my:root xmlns:my="http://my.url" test="value">
    <x/>
</my:root>

为此，我使用了绑定文件：

<?xml version="1.0"?>
<xml-bindings
    xmlns="http://www.eclipse.org/eclipselink/xsds/persistence/oxm"
    package-name="example">
    <xml-schema namespace="http://my.url" />
    <java-types>
        <java-type name="Container">
            <xml-root-element name="root"/>
            <xml-type namespace="http://my.url" />
            <java-attributes>
                <xml-element java-attribute="x" xml-path="x" type="example.X"/>
                <xml-element java-attribute="y" xml-path="." type="example.Y"/> 
            </java-attributes>
        </java-type>
        <java-type name="Y">
            <java-attributes>
                <xml-element java-attribute="test" xml-path="@test"/>
            </java-attributes>
        </java-type>
    </java-types>
</xml-bindings>

失败并出现异常：

[Exception [EclipseLink-25008] (Eclipse Persistence Services - 2.5.1.v20130918-f2b9fc5): org.eclipse.persistence.exceptions.XMLMarshalException
Exception Description: A descriptor with default root element {http://my.url}root was not found in the project]
    at org.eclipse.persistence.jaxb.JAXBBinder.unmarshal(JAXBBinder.java:100)
    at example.Main.main(Main.java:39)

给定文档的模型不一定非常直观，但我也不会对模型或文档产生影响。

我怎样才能让它发挥作用？一切正常，直到命名空间＆＃34; http://my.url＆＃34;被介绍了。

Answer 1

使用您在问题中提供的信息，以下演示代码适用于我：

演示代码

<强>演示

import java.io.File;
import java.util.*;
import javax.xml.bind.*;
import org.eclipse.persistence.jaxb.JAXBContextProperties;;

public class Demo {

    public static void main(String[] args) throws Exception {
        Map<String, Object> properties = new HashMap<String, Object>(1);
        properties.put(JAXBContextProperties.OXM_METADATA_SOURCE, "example/oxm.xml");
        JAXBContext jc = JAXBContext.newInstance(new Class[] {Container.class}, properties);

        Unmarshaller unmarshaller = jc.createUnmarshaller();
        File xml = new File("src/example/input.xml");
        Object result = unmarshaller.unmarshal(xml);

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

}

<强>输出

<?xml version="1.0" encoding="UTF-8"?>
<ns0:root xmlns:ns0="http://my.url">
   <x/>
</ns0:root>

如何使用EclipseLink MOXy绑定命名空间的元素？

1 个答案:

演示代码