一个很让我郁闷的java异常

今天下午遇到一个很让我恼火的异常，整了N久也没有搞出来！虽然知道是包冲突，可是也找不出来原因。

]] Root cause of ServletException.
java.lang.LinkageError: loader constraint violation: when resolving method "javax.xml.validation.SchemaFactory.newSchema(Ljavax/xml/transform/Source;)Ljavax/xml/validation/Schema;" the class loader (instance of weblogic/utils/classloaders/ChangeAwareClassLoader) of the current class, com/geostar/csw/util/JaxbUtil, and the class loader (instance of <bootloader>) for resolved class, javax/xml/validation/SchemaFactory, have different Class objects for the type javax/xml/transform/Source used in the signature
 at com.geostar.csw.util.JaxbUtil.Xml2Object(JaxbUtil.java:122)
 at com.geostar.csw.servlet.CSWServlet.doPost(CSWServlet.java:85)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:820)
 at weblogic.servlet.internal.StubSecurityHelper$ServletServiceAction.run(StubSecurityHelper.java:227)
 Truncated. see log file for complete stacktrace
>

其中关键的代码： at com.geostar.csw.util.JaxbUtil.Xml2Object(JaxbUtil.java:122) 实现如下：

 public  static  Object Xml2Object(Class<?> clazz,InputStream is,InputStream  schema)throws SAXException,JAXBException{
   Object obj = null ;
   try{
   ValidationEventCollector vec = new  ValidationEventCollector();  
    SchemaFactory sf = SchemaFactory.newInstance(XMLConstants.W3C_XML_SCHEMA_NS_URI);  
    InputSource inSource=new InputSource(schema);
    SAXSource sax=new SAXSource(inSource);
       Schema sch = sf.newSchema(sax); //出错的地方
       JAXBContext jc = JAXBContext.newInstance(clazz.getPackage().getName());   
       Unmarshaller u = jc.createUnmarshaller();   
       u.setSchema(sch);   
       u.setEventHandler(vec);   
       obj = u.unmarshal(is);
    }
       catch(SAXException e){
      throw  new SAXException(e.getMessage());
       }catch(JAXBException e){
      throw new JAXBException(e.getMessage());
       }
       return obj;  
 };

其中：Schema类型为：javax.xml.validation.Schema;SchemaFactory为javax.xml.validation.SchemaFactory，JDK为1.6的。不知道怎么解决这个问题！

汗~~~~~~~~~~~~~~~~。

在网上看了一下,别人说可能和weblogic的包冲突，于是我又配置了一个weblogic.xml

内容如下：

<?xml version="1.0" encoding="UTF-8"?>

<weblogic-web-app xmlns="http://www.bea.com/ns/weblogic/weblogic-web-app" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.bea.com/ns/weblogic/weblogic-web-app http://www.bea.com/ns/weblogic/weblogic-web-app/1.0/weblogic-web-app.xsd">
 <jsp-descriptor>
  <keepgenerated>true</keepgenerated>
  <page-check-seconds>60</page-check-seconds>
  <precompile>true</precompile>
  <precompile-continue>true</precompile-continue>
 </jsp-descriptor>
 <container-descriptor>
  <optimistic-serialization>true</optimistic-serialization>
  <show-archived-real-path-enabled>true</show-archived-real-path-enabled>
  <prefer-web-inf-classes>true</prefer-web-inf-classes>
 </container-descriptor>
</weblogic-web-app>