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.IntConverter10 path                : /interface/items/roomstate11 class[1]            : catic.hotel.server.webservice.Items12 converter-type[1]   : com.thoughtworks.xstream.converters.reflection.ReflectionConverter13 class[2]            : catic.hotel.server.webservice.Interface14 version             : null15 -------------------------------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。