500 Dispatch to method returned an exception(hibernate错误)
这段代码本来是正确的,但是放到Struts就报错,是怎么回事? 
Session session=HibernateSessionFactory.getSession(); 
int pageSize=5; 
int currentPage=2; 
Query qy=session.createQuery("from Product"); 
int count=qy.list().size(); 
int totalPage=(count-1)/5+1; 
System.err.print(totalPage); 
qy.setFirstResult((currentPage-1)*pageSize); 
qy.setMaxResults(pageSize); 
List list=qy.list(); 
for(int i=0;i <list.size();i++){ 
Product product=(Product)list.get(i); 
System.err.println(product.getMember().getMemberName()); 
} 

报错: 
[18:37:47.039] Dispatch[/product] to method pagination returned an exception 
[18:37:47.039] java.lang.reflect.InvocationTargetException 
[18:37:47.039] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
[18:37:47.039] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) 
[18:37:47.039] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) 
[18:37:47.039] at java.lang.reflect.Method.invoke(Method.java:324) 
[18:37:47.039] at org.apache.struts.actions.DispatchAction.dispatchMethod(DispatchAction.java:280) 
[18:37:47.039] at org.apache.struts.actions.DispatchAction.execute(DispatchAction.java:216) 
[18:37:47.039] at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:484) 
[18:37:47.039] at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:274) 
[18:37:47.039] at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1482) 
[18:37:47.039] at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:507) 
[18:37:47.039] at javax.servlet.http.HttpServlet.service(HttpServlet.java:115) 
[18:37:47.039] at javax.servlet.http.HttpServlet.service(HttpServlet.java:92) 
[18:37:47.039] at com.caucho.server.dispatch.ServletFilterChain.doFilter(ServletFilterChain.java:106) 
[18:37:47.039] at com.filters.Character.doFilter(Character.java:24) 
[18:37:47.039] at com.caucho.server.dispatch.FilterFilterChain.doFilter(FilterFilterChain.java:70) 
[18:37:47.039] at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:178) 
[18:37:47.039] at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:229) 
[18:37:47.039] at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:268) 
[18:37:47.039] at com.caucho.server.port.TcpConnection.run(TcpConnection.java:389) 
[18:37:47.039] at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:507) 
[18:37:47.039] at com.caucho.util.ThreadPool.run(ThreadPool.java:433) 
[18:37:47.039] at java.lang.Thread.run(Thread.java:534) 
[18:37:47.039] Caused by: java.lang.NoClassDefFoundError: antlr/ANTLRException 
[18:37:47.039] at org.hibernate.hql.ast.ASTQueryTranslatorFactory.createQueryTranslator(ASTQueryTranslatorFactory.java:35) 
[18:37:47.039] at org.hibernate.engine.query.HQLQueryPlan. <init>(HQLQueryPlan.java:72) 
[18:37:47.039] at org.hibernate.engine.query.HQLQueryPlan. <init>(HQLQueryPlan.java:54) 
[18:37:47.039] at org.hibernate.engine.query.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:71) 
[18:37:47.039] at org.hibernate.impl.AbstractSessionImpl.getHQLQueryPlan(AbstractSessionImpl.java:133) 
[18:37:47.039] at org.hibernate.impl.AbstractSessionImpl.createQuery(AbstractSessionImpl.java:112) 
[18:37:47.039] at org.hibernate.impl.SessionImpl.createQuery(SessionImpl.java:1583) 
[18:37:47.039] at com.jgssdw.product.service.ProductDuration.pagination(ProductDuration.java:58) 
[18:37:47.039] at com.jgssdw.product.action.ProductAction.pagination(ProductAction.java:41)