xStream异常

XStream xStream = new XStream(new XppDriver(new NoNameCoder()));// XStream xStream = new XStream(new DomDriver());xStream.processAnnotations(TaxML.class);String str = "" + "" + "wych" + "3.14159265358979" + "a" + "" + "";TaxML taxML = (TaxML)xStream.fromXML(str);System.out.println(taxML.getSbSaveReturnVO().getPzxh());异常如下：Exception in thread "Main Thread" com.thoughtworks.xstream.io.StreamException: Cannot create XmlPullParserat com.thoughtworks.xstream.io.xml.AbstractXppDriver.createReader(AbstractXppDriver.java:56)at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1040)at com.thoughtworks.xstream.XStream.fromXML(XStream.java:1031)at com.gfsy.xml.demo.DemoSBSaveReturnVO.main(DemoSBSaveReturnVO.java:21)原因：缺少jar包。使用xStream需要引入3个jar包。1，xmlpull-1.1.3.1.jar2，xsream-1.4.7.jar3，xpp3_min-1.1.4c.jar