org.hibernate.HibernateException: No Session found for current thread

    at org.springframework.orm.hibernate4.SpringSessionContext.currentSession(SpringSessionContext.java:106)

    at org.hibernate.internal.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:988)

    at cn.myic.dao.impl.BaseDaoImpl.getEntityClassName(BaseDaoImpl.java:58)

    at cn.myic.dao.impl.BaseDaoImpl.findAll(BaseDaoImpl.java:86)

    at cn.myic.service.impl.BaseManagerImpl.findAll(BaseManagerImpl.java:39)

    at cn.myic.controller.CourseController.showAll(CourseController.java:107)

    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

    at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

    at java.lang.reflect.Method.invoke(Unknown Source)

    at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:175)

    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:446)

    at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:434)

    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:938)

    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:870)

    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:961)

    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:852)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)

    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:837)

    at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:291)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

    at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)

    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:108)

    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:239)

    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)

    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:217)

    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)

    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)

    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:142)

    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)

    at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)

    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)

    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:518)

    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1091)

    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:673)

    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)

    at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)

    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)

    at java.lang.Thread.run(Unknown Source)

    <filter>

        <filter-name>openSessionInViewFilter</filter-name>

        <filter-class>org.springframework.orm.hibernate4.support.OpenSessionInViewFilter</filter-class>

        <init-param>

            <param-name>singleSession</param-name>

            <param-value>true</param-value>

        </init-param>

    </filter>

    <filter-mapping>

        <filter-name>openSessionInViewFilter</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>

<prop key="hibernate.current_session_context_class">org.springframework.orm.hibernate4.SpringSessionContext</prop>

<prop key="current_session_context_class">thread</prop>