I'm working with Java web development, using spring3.1.1+hibernate3.6.0+tomcat7.0.29 + mysql5.5, but after running on my server, Eclipse prompted that 

```
 HTTP Status 500 - Handler processing failed; nested exception is java.lang.NoClassDefFoundError:       org/springframework/orm/hibernate3/support/HibernateDaoSupport 

```

and as follows in detail,
type Exception report 

```
message Handler processing failed; nested exception is java.lang.NoClassDefFoundError:            org/springframework/orm/hibernate3/support/HibernateDaoSupport

description The server encountered an internal error (Handler processing failed; nested exception is java.lang.NoClassDefFoundError:     org/springframework/orm/hibernate3/support/HibernateDaoSupport) that prevented it from fulfilling this request. 

```

exception 

```
org.springframework.web.util.NestedServletException: Handler processing failed; nested exception is java.lang.NoClassDefFoundError:       org/springframework/orm/hibernate3/support/HibernateDaoSupport

org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:972)

org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852) 
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:621) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 
root cause 

java.lang.NoClassDefFoundError:   org/springframework/orm/hibernate3/support/HibernateDaoSupport 
java.lang.ClassLoader.defineClass1(Native Method) 
java.lang.ClassLoader.defineClass(ClassLoader.java:791) 
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) 
 org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2901)
org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1170) 
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678) 
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556) 
cc.fanbang.api.manager.DBManager.addUser(DBManager.java:139) 
 cc.fanbang.api.controller.TestController.handleDBManagerTestRequest(TestController.java:42)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
java.lang.reflect.Method.invoke(Method.java:601) 
 org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:436)
  org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
  org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923) 
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852) 
org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:621) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 
root cause 

java.lang.ClassNotFoundException:      org.springframework.orm.hibernate3.support.HibernateDaoSupport 
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1711) 
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556) 
java.lang.ClassLoader.defineClass1(Native Method) 
java.lang.ClassLoader.defineClass(ClassLoader.java:791) 
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142) 
org.apache.catalina.loader.WebappClassLoader.findClassInternal(WebappClassLoader.java:2901)
org.apache.catalina.loader.WebappClassLoader.findClass(WebappClassLoader.java:1170) 
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678) 
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1556) 
cc.fanbang.api.manager.DBManager.addUser(DBManager.java:139) 
     cc.fanbang.api.controller.TestController.handleDBManagerTestRequest(TestController.java:42)
sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) 
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) 
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) 
java.lang.reflect.Method.invoke(Method.java:601) 
   org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:176)
   org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:436)
  org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:424)
org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:923) 
org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:852) 
 org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:882)
org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:778) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:621) 
javax.servlet.http.HttpServlet.service(HttpServlet.java:722) 

```

I can't understand why it told me that no hibernatedaosupport, and I've imported it in the project in referenced libraries and web-inf/lib. 
packages which I've imported as follows,

```
 commons-beanutils-1.8.3.jar 
    commons-coder-1.4.jar 
    commons-io-2.3.jar 
    commons-lang-2.6.jar 
    commons-logging-1.1.1.jar 
    ezorph-1.0.6.jar 
    json-lib-2.4-jdk15.jar 
    jstl-1.2.jar 
    org.springframework.asm-3.1.1.release.jar 
    org.springframework.beans-3.1.1.release.jar 
    org.springframework.context-3.1.1.release.jar 
    org.springframework.core-3.1.1.release.jar 
    org.springframework.expression-3.1.1.release.jar 
    org.springframework.web.servlet-3.1.1.release.jar 
    org.springframework.web-3.1.1.release.jar 
    servlet-api.jar 
    antlr-2.7.6 
    c3p0-0.9.1.jar 
    commons-collections-3.1.jar 
    dom4j-1.6.1.jar 
    ehcache-1.5.0.jar 
    hibernate-jpa-2.0-api-1.0.1.final.jar 
    hibernate3.jar 
    javassist-3.12.0.ga.jar 
    jta-1.1.jar 
    mysql-connector-java-5.1.12-bin.jar 
    org.springframework.orm-3.1.1.release.jar 
    org.springframework.jdbc-3.1.1.release.jar 
    org.springframework.aop-3.1.1.release.jar 
    org.springframework.transaction-3.1.1.release.jar 
    slf4j-api-1.6.1.jar 
    slf4j-nop-1.6.1.jar 

```

and the part contents of applicationContext.xml related to transaction process as follows,

```
<bean id="transactionManager"           class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
    <property name="sessionFactory" ref="sessionFactory" />  
</bean> 

<tx:advice id="txAdvice" transaction-manager="transactionManager"> 
    <tx:attributes> 
        <tx:method name="get*" read-only="true" /> 
        <tx:method name="*" /> 
    </tx:attributes> 
</tx:advice> 

<aop:config> 
    <aop:pointcut id="fbPointcut" expression="bean(dbManager)" /> 
    <aop:advisor advice-ref="txAdvice" pointcut-ref="fbPointcut" /> 
</aop:config>

```