hibernate exception

Exception in thread "main" org.hibernate.MappingException: invalid configuration

Caused by: org.xml.sax.SAXParseException; lineNumber: 3; columnNumber: 25; 文档无效: 找不到语法。
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.createSAXParseException(Unknown Source)
at com.sun.org.apache.xerces.internal.util.ErrorHandlerWrapper.error(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLErrorReporter.reportError(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.scanStartElement(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl$NSContentDriver.scanRootElementHook(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl$FragmentContentDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl$PrologDriver.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLNSDocumentScannerImpl.next(Unknown Source)
at com.sun.org.apache.xerces.internal.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XML11Configuration.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.XMLParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(Unknown Source)
at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(Unknown Source)
at org.dom4j.io.SAXReader.read(SAXReader.java:465)
at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:2067)
... 3 more

class
public class StudentTest {
public static void main(String[] args) {
Student s = new Student();
s.setId(1);
s.setName("s1");
s.setAge(1);

Configuration cfg = new Configuration();
SessionFactory sf = cfg.configure().buildSessionFactory();//横着划了条黑线，不知道什么意思
Session session = sf.openSession();
session.beginTransaction();
session.save(s);
session.getTransaction().commit();
session.close();
sf.close();
}
} Hibernate 异常 session --------------------编程问答-------------------- lineNumber: 3; columnNumber: 25; 文档无效: 找不到语法。
xml配置文件有语法错误吧，第三行。
横着划了条黑线是因为方法过期，不推荐使用 --------------------编程问答-------------------- http://www.docin.com/p-678124367.html
hibernate知识总结，感兴趣的可以看看 --------------------编程问答-------------------- 看看配置文件的位置以及语法

补充：Java ,  Java相关