Question

我正在尝试编写一个应用程序，以便能够读取此类XML并基于它创建整个对象;

<actor id="id273211" PGFVersion="0.19" GSCVersion="0.10.4">
  <attributes>
    <text id="name">Actor 1b</text>
    <point id="position">
      <real id="x">0</real>
      <real id="y">0</real>
    </point>
  </attributes>
</actor>

我的问题是我将Point类的成员别名为“真实”并且它给出了异常。

我现在拥有的是什么;

@XStreamAlias("actor")
public class Actor {

    @XStreamAsAttribute
    String id = "",PGFVersion = "", GSCVersion = "";
    Attributes attributes = new Attributes();
}


public class Attributes {

    public Text text = new Text("name", "Actor 1");
    public Point point = new Point();

}


@XStreamConverter(value=ToAttributedValueConverter.class, strings={"value"})
@XStreamAlias("text")
public class Text {

    @XStreamAsAttribute
    String id;

    String value;

    public Text(String text, String value) {
        this.id = text;
        this.value = value;
    }


public class Point {
     @XStreamAlias("real")
     public Real x = new Real("x", "11");
     @XStreamAlias("real") 
     public Real y = new Real("y", "21");
     @XStreamAsAttribute
     public String id = "position";

}

我的Test.java：

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

    XStream xstream = new XStream();

    Actor actor2 = new Actor();

    xstream.processAnnotations(Text.class);
    xstream.processAnnotations(Real.class);
    xstream.processAnnotations(Point.class);
    xstream.processAnnotations(Actor.class);

    String xml = xstream.toXML(actor2);

    System.out.println(xml);

}

这完全输出XML，如下所示：

<actor id="" PGFVersion="" GSCVersion="">
  <attributes>
    <text id="name">Actor 1</text>
    <point id="position">
      <real id="x">11</real>
      <real id="y">21</real>
    </point>
  </attributes>
</actor>

但是当我尝试使用以下方法导入它时：

String xml = xstream.toXML(actor2);

Actor actorNew = (Actor)xstream.fromXML(xml);
System.out.println(xml);

它给出了一个例外：

线程“main”中的异常com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter $ DuplicateFieldException：   重复字段y   ----调试信息----字段：y类：projectmerger1.Point required-type：projectmerger1.Point   转换器类型：   com.thoughtworks.xstream.converters.reflection.ReflectionConverter   路径：/projectmerger1.Actor/attributes/point/real[2]   行号：6类[1]：   projectmerger1.Attributes class [2]：projectmerger1.Actor

版本：1.4.6

这是一个错误的设置整体还是我可以通过一些调整继续使用它？

Answer 1

我通过改变Point类来解决它;

public class Point {
    /*
     @XStreamAlias("real")
     @XStreamAlias("real2") 
     public Real y = new Real("y", "21");
     @XStreamAsAttribute
     public String id = "position";
     */

    @XStreamImplicit
     public List xy = new ArrayList();


     public void add(Real entry) {
                xy.add(entry);
        }

}

并将其添加到我的Test.java：

    actor2.attributes.point.add(new Real("x","0"));
    actor2.attributes.point.add(new Real("y","0"));

我会继续尝试这个。感谢您的支持。

XStream，别名和“DuplicateFieldException”

版本：1.4.6

1 个答案: