将XML转换为Java Map< String，Integer> [英] Converting XML into Java Map<String, Integer>

问题描述

我试图将XML转换成Java代码。这个XML是在一个不同的文件;它与数字匹配（概率分布），如下所示：

 <？xml version =1.0encoding = UTF-8？> 
< root> 
< Durapipe type =int> 1< / Durapipe> 
< EXPLAIN type =int> 2< / EXPLAIN> 
< woods type =int> 2< / woods> 
< hanging type =int> 3< / hanging> 
< hastily type =int> 2< /匆忙> 
< localized type =int> 1< / localized> 
< Schuster type =int> 5< / Schuster> 
< regularize type =int> 1< / regularize> 
< LASR type =int> 1< / LASR> 
< LAST type =int> 22< / LAST> 
< Gelch type =int> 2< / Gelch> 
< Gelco type =int> 26< / Gelco> 
 ....... 
< / root> 
  

我试图将其转换为Java Map，以下是我正在使用的代码为此：

  XStream xstream = new XStream（）; 
 @SuppressWarnings（unchecked）
 Map< String，Integer> englishCorpusProbDist =（Map< String，Integer>）xstream.fromXML（new File（LocationOfFileOnMyComputer / frequencies.xml））; 
  

目前，当我尝试运行上面的Java代码时，在控制台中出现以下异常：

 线程main中的异常com.thoughtworks.xstream.mapper.CannotResolveClassException：root 
 at com.thoughtworks .xstream.mapper.DefaultMapper.realClass（DefaultMapper.java:79）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper .DynamicProxyMapper.realClass（DynamicProxyMapper.java:55）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper.PackageAliasingMapper.realClass （PackageAliasingMapper.java:88）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass（ClassAliasingMapper.java ：79）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
a t com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
 at com.thoughtworks .xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper .MapperWrapper.realClass（MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper.ArrayMapper.realClass（ArrayMapper.java:74）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass （MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java ：30）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
在com.thoughtworks.xstream.mapper.MapperWrapper .realClass（MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper.SecurityMapper.realClass（SecurityMapper.java:71）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper .java：30）
 at com.thoughtworks.xstream.mapper.MapperWrapper.realClass（MapperWrapper.java:30）
 at com.thoughtworks.xstream.mapper.CachingMapper.realClass（CachingMapper.java:47 ）
 at com.thoughtworks.xstream.core.util.HierarchicalStreams.readClassType（HierarchicalStreams.java:29）
 at com.thoughtworks.xstream.core.TreeUnmarshaller.start（TreeUnmarshaller.java:133）
 at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal（AbstractTreeMarshallingStrategy.java:32）
 at com.thoughtworks.xstream.XStream.unmarshal（XStream.java:1185）
 at com。通过com.thoughtworks.xstream.XStream.fromXML（XStream.java:1133）
在com.thoughtworks.xstream.XStream.fromXML（$ X $）上
（xStream.java： XStream.java:1075）ProductAttributeE上的
 xtractor.main（ProductAttributeExtractor.java:23）
  

这是一篇相关文章，但是我的问题是因为我的XML与字符串匹配字符串，不幸的是Java地图不能使用整数，它必须使用整数（这是超级沮丧）：如何将XML转换为java.util.Map，反之亦然

任何帮助你可以给予非常感激。您需要注册您的MapConverter，它实现了转换器的类

$

解决方案

b $ b

xstream.registerConverter（new MapEntryConverter（））;

/ p>

I'm trying to convert XML into Java code. This XML is in a different file; it matches words with numbers (a probability distribution) and looks like this:

<?xml version="1.0" encoding="UTF-8" ?>
<root>
   <Durapipe type="int">1</Durapipe>
   <EXPLAIN type="int">2</EXPLAIN>
   <woods type="int">2</woods>
   <hanging type="int">3</hanging>
   <hastily type="int">2</hastily>
   <localized type="int">1</localized>
   <Schuster type="int">5</Schuster>
   <regularize type="int">1</regularize>
   <LASR type="int">1</LASR>
   <LAST type="int">22</LAST>
   <Gelch type="int">2</Gelch>
   <Gelco type="int">26</Gelco>
   .......
</root>

I'm trying to convert this is to a Java Map, and here's the code I'm using for that:

XStream xstream = new XStream();
    @SuppressWarnings("unchecked")
    Map<String, Integer> englishCorpusProbDist = (Map<String, Integer>)xstream.fromXML(new File("LocationOfFileOnMyComputer/frequencies.xml"));

Currently, I'm getting the following exception in my console whenever I try to run the above Java code:

Exception in thread "main" com.thoughtworks.xstream.mapper.CannotResolveClassException: root
at com.thoughtworks.xstream.mapper.DefaultMapper.realClass(DefaultMapper.java:79)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.DynamicProxyMapper.realClass(DynamicProxyMapper.java:55)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.PackageAliasingMapper.realClass(PackageAliasingMapper.java:88)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.ClassAliasingMapper.realClass(ClassAliasingMapper.java:79)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.ArrayMapper.realClass(ArrayMapper.java:74)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.SecurityMapper.realClass(SecurityMapper.java:71)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.MapperWrapper.realClass(MapperWrapper.java:30)
at com.thoughtworks.xstream.mapper.CachingMapper.realClass(CachingMapper.java:47)
at com.thoughtworks.xstream.core.util.HierarchicalStreams.readClassType(HierarchicalStreams.java:29)
at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:133)
at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1185)
at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1169)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1133)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1075)
at ProductAttributeExtractor.main(ProductAttributeExtractor.java:23)

This is a related post, but my problem is an added layer of complexity in that my XML matches Strings with ints, and unfortunately the Java Map cannot use ints, it has to use Integers (which is super frustrating): How to convert XML to java.util.Map and vice versa

Any help you can give would be very appreciated. Thanks in advance!

解决方案

You need to register your MapConverter, the class which implements Converter

xstream.registerConverter(new MapEntryConverter());

Hope that helps

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