Premature end of file.

我用xstream 对xml处理的时候报错：[Fatal Error] :1:1: Premature end of file.
com.thoughtworks.xstream.io.StreamException:  : Premature end of file.
at com.thoughtworks.xstream.io.xml.DomDriver.createReader(DomDriver.java:86)
at com.thoughtworks.xstream.io.xml.DomDriver.createReader(DomDriver.java:66)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:853)
at com.thoughtworks.xstream.XStream.fromXML(XStream.java:845)
at com.caitong.commBean.back.BackBeanFactory.getBean(BackBeanFactory.java:79)
at com.caitong.commBean.manager.BaseManager.doAction(BaseManager.java:117)
at com.caitong.services.NotifyActServiceImpl.checkNotifyAct(NotifyActServiceImpl.java:85)
at com.caitong.payment.scheduler.PayCheckingJob.invokeMethod(PayCheckingJob.java:97)
at com.caitong.payment.scheduler.PayCheckingJob.main(PayCheckingJob.java:392)
Caused by: org.xml.sax.SAXParseException: Premature end of file.
at com.sun.org.apache.xerces.internal.parsers.DOMParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.DocumentBuilderImpl.parse(Unknown Source)
at com.thoughtworks.xstream.io.xml.DomDriver.createReader(DomDriver.java:79)
... 8 more
这个怎么解决呀