java - 通过 XSTREAM 处理 XML 中不需要的元素

Question

我是 XStream 新手

我有以下 DTO

@XStreamAlias("outline")
public class OutlineItem implements java.io.Serializable {

    private static final long serialVersionUID = -2321669186524783800L;

    @XStreamAlias("text")
    @XStreamAsAttribute
    private String text;

    @XStreamAlias("removeMe")
    private List<OutlineItem> childItems;
}

一旦我这样做

XStream stream = new XStream();
stream.processAnnotations(OutlineItem.class);
stream.toXML(outlineItem);

我把它作为我的输出文本

<outline text="Test">
  <removeMe>
    <outline text="Test Section1">
      <removeMe>
        <outline text="Sub Section1 1">
          <removeMe/>
        </outline>
        <outline text="Sub Section1 2">
          <removeMe/>
        </outline>
      </removeMe>
    </outline>
    <outline text="Test Section 2">
      <removeMe>
        <outline text="Test Section2 1">
          <removeMe/>
        </outline>
      </removeMe>
    </outline>
  </removeMe>
</outline>

而我希望输出是:

<outline text="Test">
    <outline text="Test Section1">
        <outline text="Sub Section1 1">
        </outline>
        <outline text="Sub Section1 2">
        </outline>
    </outline>
    <outline text="Test Section 2">
        <outline text="Test Section2 1">
        </outline>
    </outline>
</outline>

任何帮助将不胜感激!不确定是否需要某种 XSLT...

• 沙阿

Answer 1

注意:我是EclipseLink JAXB (MOXy)领导者，也是 JAXB ( JSR-222 ) 专家组的成员。

<小时/>

我相信答案是:

@XStreamImplicit(itemFieldName="outline")
private List<OutlineItem> childItems;

您是否考虑过使用 JAXB 实现( Metro 、 MOXy 、 JaxMe 、...)？

• Modern alternative to Java XStream library?
• http://bdoughan.blogspot.com/2010/10/how-does-jaxb-compare-to-xstream.html

大纲项

import javax.xml.bind.annotation.*;

@XmlRootElement(name="outline")
@XmlAccessorType(XmlAccessType.FIELD)
public class OutlineItem implements java.io.Serializable {

    private static final long serialVersionUID = -2321669186524783800L;

    @XmlAttribute
    private String text;

    @XmlElement("outline")
    private List<OutlineItem> childItems;

}

演示

import javax.xml.bind.*;

public class Demo {

    public static void main(String[] args) throws JAXBException {

        JAXBContext jaxbContext = JAXBContext.newInstance(OutlineItem.class);

        Marshaller marshaller = jaxbContext.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(outlineItem, System.out);

    }

}