com.thoughtworks.xstream.converters.ConversionException

使用webService调用接口，返回的是xml格式，运用xstream解析的时候，出现了如下的错误：

 1 Exception in thread "Timer-1" com.thoughtworks.xstream.converters.ConversionException: For input string: "VS" : For input string: "VS"
 2 ---- Debugging information ----
 3 message             : For input string: "VS"
 4 cause-exception     : java.lang.NumberFormatException
 5 cause-message       : For input string: "VS"
 6 class               : java.lang.Integer
 7 required-type       : java.lang.Integer
 8 converter-type      : com.thoughtworks.xstream.converters.SingleValueConverterWrapper
 9 wrapped-converter   : com.thoughtworks.xstream.converters.basic.IntConverter
10 path                : /interface/items/roomstate
11 class[1]            : catic.hotel.server.webservice.Items
12 converter-type[1]   : com.thoughtworks.xstream.converters.reflection.ReflectionConverter
13 class[2]            : catic.hotel.server.webservice.Interface
14 version             : null
15 -------------------------------
16     at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:79)
17     at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
18     at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
19     at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshallField(AbstractReflectionConverter.java:355)
20     at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:306)
21     at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:234)
22     at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
23     at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
24     at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
25     at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
26     at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.doUnmarshal(AbstractReflectionConverter.java:322)
27     at com.thoughtworks.xstream.converters.reflection.AbstractReflectionConverter.unmarshal(AbstractReflectionConverter.java:234)
28     at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
29     at com.thoughtworks.xstream.core.AbstractReferenceUnmarshaller.convert(AbstractReferenceUnmarshaller.java:65)
30     at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:66)
31     at com.thoughtworks.xstream.core.TreeUnmarshaller.convertAnother(TreeUnmarshaller.java:50)
32     at com.thoughtworks.xstream.core.TreeUnmarshaller.start(TreeUnmarshaller.java:134)
33     at com.thoughtworks.xstream.core.AbstractTreeMarshallingStrategy.unmarshal(AbstractTreeMarshallingStrategy.java:32)
34     at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1058)
35     at com.thoughtworks.xstream.XStream.unmarshal(XStream.java:1042)
36     at com.thoughtworks.xstream.XStream.fromXML(XStream.java:913)
37     at com.thoughtworks.xstream.XStream.fromXML(XStream.java:904)
38     at catic.library.util.XmlBeanConvertUtil.xml2Bean(XmlBeanConvertUtil.java:27)
39     at catic.library.util.XMLUtil.roomStatusXmlToList2(XMLUtil.java:86)
40     at catic.hotel.server.server.ReadDataByPMSOurDB$ReadPMSUptOurDB.run(ReadDataByPMSOurDB.java:104)
41     at java.util.TimerThread.mainLoop(Unknown Source)
42     at java.util.TimerThread.run(Unknown Source)
43 Caused by: java.lang.NumberFormatException: For input string: "VS"
44     at java.lang.NumberFormatException.forInputString(Unknown Source)
45     at java.lang.Long.parseLong(Unknown Source)
46     at java.lang.Long.valueOf(Unknown Source)
47     at java.lang.Long.decode(Unknown Source)
48     at com.thoughtworks.xstream.converters.basic.IntConverter.fromString(IntConverter.java:27)
49     at com.thoughtworks.xstream.converters.SingleValueConverterWrapper.fromString(SingleValueConverterWrapper.java:41)
50     at com.thoughtworks.xstream.converters.SingleValueConverterWrapper.unmarshal(SingleValueConverterWrapper.java:49)
51     at com.thoughtworks.xstream.core.TreeUnmarshaller.convert(TreeUnmarshaller.java:72)
52     ... 26 more

由43行可以看出，是类型转换异常，因为返回的类型既有String，又有Integer，而我只用了Integer，忽略了String，所以报错。

刚开始还以为是使用xstream报的错，由于是第一次使用这个东东……不过，xstream这个东东真的很好用。