hibernate - Spring constructor injection shows null When accessing it on methods -

i developing small application struts2 + spring + hibernate...spring beans injected on server start-up .. have stepped through setters on start , injecting properly. however, run post method , post method(execute() in struts2) , values injected null. why happen?

bean injection :

<bean id="useraction" class="com.example.user.action.useraction">       <constructor-arg  index="0">             <ref bean="userservicetarget"/>       </constructor-arg> </bean> 

my struts2 constructor :

 public useraction(iuserservice userservice)     {        this.userservice=userservice;      }  

struts2 method :

 public string execute() {         this.user=(user)userservice.findbyid(this.id);  } 

but inside execute method userservice value null... when inject injected prperly..

thank you...

i think constructor-args not way ijecting beans another. give example:

applicationcontext.xml:

<bean id="useraction" class="com.example.user.action.useraction"/> <bean id="userservicetarget" class="com.example.user.userservicetarget"> 

useraction.java:

@autowired private userservicetarget userservice; 

you can use other configurations also. example:

<bean id="useraction" class="com.example.user.action.useraction"> <property name="userservice" ref="userservicetarget"/> </bean> 

by way autowired annotation not needed, setter.

i don't xml much, best way using stereotype annotations. can use @service annotation on service class , can forget declare bean in appcontext, should add 2 lines way:

<context:annotation-config />  <context:component-scan base-package="com.example"/> 

hope helped!