java XStream:重复字段异常

Question

<staging>
    <stage>
        <name>aaaa</name>
        <taskName>aa</taskName>
        <taskName>qwqwse</taskName>
        <taskName>qwe</taskName>
        <iconName>asdad</iconName>
        <iconName>dasd</iconName>
    </stage>

    <stage>
        <name>dasda</name>
        <taskName>asdak</taskName>
        <taskName>dasdk1</taskName>
        <taskName>dasdask2</taskName>
        <iconName>dasdn</iconName>
        <iconName>dasdcon</iconName>
    </stage>
</staging>

这是我的java类：

@XStreamAlias("stage")
public class Stage {

private String name;
private List<String> taskName;
private List<String> iconName;
}

我正在使用XStream 1.4.2将XML数据转换为Java对象

我已经看过几篇SO帖子，但它仍然不能解决我的问题

它引发了以下例外：

com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter$DuplicateFieldException: Duplicate field taskName
---- Debugging information ----
field               : taskName
class               : com.thbs.soaconnect.model.configuration.Stage
required-type       : com.thbs.soaconnect.model.configuration.Stage
converter-type      :      com.thoughtworks.xstream.converters.reflection.ReflectionConverter
path                : /soaConnect/staging/stage/taskName[2]
line number         : 28
class[1]            : java.util.ArrayList
converter-type[1]   :   com.thoughtworks.xstream.converters.collections.CollectionConverter
class[2]            : com.thbs.soaconnect.model.configuration.Configuration
version             : null

正如许多人以前建议的那样，我尝试了以下方法：

xstream.addImplicitCollection(Stage.class,"taskName", String.class);
xstream.addImplicitCollection(Stage.class,"iconName", String.class);

虽然它不会抛出任何异常，但它无法读取值，每个元素都有

你能帮帮我吗

Answer 1

您不必在Stage类中添加任何内容。只需向Stage类添加适当的别名，然后使用addImplicitCollections

XML Input :
<stage>
        <name>dasda</name>
        <taskName>asdak</taskName>
        <taskName>dasdk1</taskName>
        <taskName>dasdask2</taskName>
        <iconName>dasdn</iconName>
        <iconName>dasdcon</iconName>
 </stage>

Code for Stage Class :
public class Stage {

private String name;
    private List<String> taskName;
    private List<String> iconName;
}

Code to retrieve parse XML using xtream object :
Xstream.alias("stage", Stage.class);
Xstream.addImplicitCollection(Stage.class,"taskName",String.class);
Xstream.addImplicitCollection(Stage.class,"iconName",String.class);

It worked for me.       

Answer 2

答案就在调试信息中

Duplicate field taskName
path                : /soaConnect/staging/stage/taskName[2]

更新：

看看这个answer我认为您缺少一些注释

    @XStreamAlias("stage")
    public class Stage {

    private String name;

    @XStreamImplicit(itemFieldName="taskName")
    private List<String> tasks;

    @XStreamImplicit(itemFieldName="iconName")
    private List<String> icons;
    }