急！！！！求大侠指点，请问这是什么错误，在线等...
ype Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

javax.servlet.ServletException: Servlet execution threw an exception
root cause

java.lang.NoClassDefFoundError: org/logicalcobwebs/proxool/ProxoolException
java.lang.Class.getDeclaredConstructors0(Native Method)
java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
java.lang.Class.getConstructor0(Class.java:2699)
java.lang.Class.newInstance0(Class.java:326)
java.lang.Class.newInstance(Class.java:308)
org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:96)
org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:79)
org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:448)
org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:89)
org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2101)
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1325)
com.hoteam.kaide.abc.dao.HibernateUtils.<clinit>(HibernateUtils.java:16)
com.hoteam.kaide.abc.dao.AbcTestDAO.save(AbcTestDAO.java:33)
com.hoteam.kaide.abc.service.AbcService.addAbc(AbcService.java:14)
com.hoteam.kaide.abc.action.AbcAction.execute(AbcAction.java:35)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause

java.lang.ClassNotFoundException: org.logicalcobwebs.proxool.ProxoolException
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1363)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1209)
java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
java.lang.Class.getDeclaredConstructors0(Native Method)
java.lang.Class.privateGetDeclaredConstructors(Class.java:2389)
java.lang.Class.getConstructor0(Class.java:2699)
java.lang.Class.newInstance0(Class.java:326)
java.lang.Class.newInstance(Class.java:308)
org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:96)
org.hibernate.connection.ConnectionProviderFactory.newConnectionProvider(ConnectionProviderFactory.java:79)
org.hibernate.cfg.SettingsFactory.createConnectionProvider(SettingsFactory.java:448)
org.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:89)
org.hibernate.cfg.Configuration.buildSettings(Configuration.java:2101)
org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1325)
com.hoteam.kaide.abc.dao.HibernateUtils.<clinit>(HibernateUtils.java:16)
com.hoteam.kaide.abc.dao.AbcTestDAO.save(AbcTestDAO.java:33)
com.hoteam.kaide.abc.service.Ab