JAXB Fragment Marshal没有命名空间

Question

我正在使用我的marshaller的JAXB_FRAGMENT属性来编组WorkSet级别.问题在于,当我封送它时,每次都为WorkSet元素提供xmlns属性.有没有办法编组,以便它不附加xmlns属性？这是我的XML的样子.

    <Import>
        <WorkSets>
            <WorkSet xmlns="http://www.namespace.com">
                <Work>
                <Work>
                ...
                ..
                ...
            </WorkSet>
            <WorkSet xmlns="http://www.namespace.com">
                <Work>
                <Work>
                ...
            </WorkSet>
        </WorkSets>
    </Import>

这是我正在使用上面创建的代码:

FileOutputStream fos = new FileOutputStream("import.xml");
XMLStreamWriter writer = XMLOutputFactory.newFactory().createXMLStreamWriter(fos);

JAXBContext jc = JAXBContext.newInstance(WorkSet.class);
Marshaller m = jc.createMarshaler();
m.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);

writer.writeStartDocument();
writer.writeStartElement("Import");
writer.writeAttribute("xmlns","http://www.namespace.com");
writer.writeStartElement("WorkSets");

while(hasWorkSet){
m.marshal(workSet, writer)
}
writer.writeEndDocument();
writer.close();

Answer 1

假设您想要文档的默认命名空间http://www.namespace.com,您可以执行以下操作:

演示

该XMLStreamWriter.setDefaultNamespace(String)和XMLStreamWriter.writeNamespace(String, String)方法将被用于设置和编写XML文档的默认命名空间.

package forum9297872;

import javax.xml.bind.*;
import javax.xml.stream.*;

public class Demo {

    public static void main(String[] args) throws Exception {
        XMLStreamWriter writer = XMLOutputFactory.newFactory().createXMLStreamWriter(System.out);
        writer.setDefaultNamespace("http://www.namespace.com");

        JAXBContext jc = JAXBContext.newInstance(WorkSet.class);
        Marshaller m = jc.createMarshaller();
        m.setProperty(Marshaller.JAXB_FRAGMENT, Boolean.TRUE);

        writer.writeStartDocument();
        writer.writeStartElement("http://www.namespace.com", "Import");
        writer.writeNamespace("", "http://www.namespace.com");
        writer.writeStartElement("WorkSets");

        m.marshal(new WorkSet(), writer);
        m.marshal(new WorkSet(), writer);

        writer.writeEndDocument();
        writer.close();
    }

}

工作集

我的假设是您在JAXB模型中指定了名称空间信息.

package forum9297872;

import javax.xml.bind.annotation.XmlRootElement;

@XmlRootElement(name="WorkSet", namespace="http://www.namespace.com")
public class WorkSet {

}

产量

以下是运行演示代码的输出:

<?xml version="1.0" ?><Import xmlns="http://www.namespace.com"><WorkSets><WorkSet></WorkSet><WorkSet></WorkSet></WorkSets></Import>