public   class   Javaservice   extends   HttpServlet   { 
private   UserService   userservice; 
public   void   doGet(HttpServletRequest   request,   HttpServletResponse   response) 
                throws   ServletException, 
                        IOException   { 
                System.out.print( "f "); 
                userservice.getaallStudent();(这一句在运行中发现是null) 
                response.setContentType( "text/html "); 
                PrintWriter   out   =   response.getWriter(); 
} 
        public   UserService   getUserservice()   { 
                System.out.println( "get------------------------------------ "); 
                return   userservice; 
        } 

        public   void   setUserservice(UserService   userservice)   { 
                System.out.println( "set------------------------------------ ");（这一句在TOMCAT启动时发现正常，能注入值） 
                this.userservice   =   userservice; 
        } 

<bean   id= "userservice "   parent= "txProxyTemplate "> 
<property   name= "target "> <ref   bean= "userserviceImpl "/> </property> 
<property   name= "proxyInterfaces "> 
<value> com.sos.service.UserService </value> 
</property> 
</bean> 
<bean   id= "userserviceImpl "   class= "com.sos.service.UserServiceImpl "> 
<property   name= "userdao "> <ref   bean= "userdao "/> </property> 
</bean> 
<bean   id= "userdao "   class= "com.sos.hibernate.UserDAO "> 
<property   name= "sessionFactory "> <ref   bean= "sessionFactory "/> </property> 
</bean> 


<bean   id= "Javaservice "   class= "com.sos.action.Javaservice "> 
<property   name= "userservice "> <ref   bean= "userservice "/> </property> 
</bean>