JB中使用数据源！

我用Hibernate 出现下面问题！请指教
exception javax.servlet.ServletException: could not instantiate CacheProvider: net.sf.ehcache.hibernate.Provider
org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextImpl.java:825)
org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:758)
org.apache.jsp.couse_jsp._jspService(couse_jsp.java:117)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:298)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
root cause net.sf.hibernate.HibernateException: could not instantiate CacheProvider: net.sf.ehcache.hibernate.Provider
net.sf.hibernate.cfg.SettingsFactory.buildSettings(SettingsFactory.java:133)
net.sf.hibernate.cfg.Configuration.buildSettings(Configuration.java:1132)
net.sf.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:766)
hibernating.HibernateBase.initHibernate(HibernateBase.java:24)
hibernating.HibernateBase.<init>(HibernateBase.java:17)
hibernating.CourseBean.<init>(CourseBean.java:13)
org.apache.jsp.couse_jsp._jspService(couse_jsp.java:65)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:298)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)