spring - component-scan get in the way of bean initialization? -

i encounter problem while trying duplicate simple spring oauth project, sparklr2. source code here https://github.com/spring-projects/spring-security-oauth/tree/master/samples/oauth2/sparklr

the source code runs perfectly, when debug tomcat, initialize @bean inside webmvcconfigureradapter, including controllers. noted @componentscan() not being used.

then create own mvc project, copy 100% of code, using webapplicationinitializer instead of abstractdispatcherservletinitializer. use webapllicationinitializer because have learned way code mvc.

then run project, @bean initialized. check /login browser, 404. caused spring not knowing have controllers, add @componentscan configuration class, /login shows up. weird thing is, @bean related controller, not initialized. so, when call method controller, since attributes not initialized, gives me no object or null exception.

so, point is, how sample works, mean controller , jsp correctly handle , response without using @componentscan? , @ different angle, why @componentscan stop @bean being initialize in project?

my webapplicationinitializer

@configuration @enablewebmvc @componentscan("umedia.test.oauth.controller") public class mvcconfig extends webmvcconfigureradapter {      @bean     public static propertysourcesplaceholderconfigurer propertysourcesplaceholderconfigurer() {         return new propertysourcesplaceholderconfigurer();     }      @bean     public contentnegotiatingviewresolver contentviewresolver()             throws exception {         contentnegotiationmanagerfactorybean contentnegotiationmanager = new contentnegotiationmanagerfactorybean();         contentnegotiationmanager.addmediatype("json",                 mediatype.application_json);          internalresourceviewresolver viewresolver = new internalresourceviewresolver();         viewresolver.setviewclass(jstlview.class);         viewresolver.setprefix("/web-inf/views/");         viewresolver.setsuffix(".jsp");          mappingjackson2jsonview defaultview = new mappingjackson2jsonview();         defaultview.setextractvaluefromsinglekeymodel(true);          contentnegotiatingviewresolver contentviewresolver = new contentnegotiatingviewresolver();         contentviewresolver                 .setcontentnegotiationmanager(contentnegotiationmanager                         .getobject());         contentviewresolver.setviewresolvers(arrays                 .<viewresolver> aslist(viewresolver));         contentviewresolver.setdefaultviews(arrays.<view> aslist(defaultview));         return contentviewresolver;     }        @bean     public photoserviceimpl photoservices() {         list<photoinfo> photos = new arraylist<photoinfo>();         photos.add(createphoto("1", "marissa"));         photos.add(createphoto("2", "paul"));         photos.add(createphoto("3", "marissa"));         photos.add(createphoto("4", "paul"));         photos.add(createphoto("5", "marissa"));         photos.add(createphoto("6", "paul"));          photoserviceimpl photoservices = new photoserviceimpl();         photoservices.setphotos(photos);         return photoservices;     }      // n.b. @qualifier here should not necessary (gh-298) lots of     // users report needing it.     @bean     public admincontroller admincontroller(             tokenstore tokenstore,             @qualifier("consumertokenservices") consumertokenservices tokenservices,             sparklruserapprovalhandler userapprovalhandler) {         admincontroller admincontroller = new admincontroller();         admincontroller.settokenstore(tokenstore);         admincontroller.settokenservices(tokenservices);         admincontroller.setuserapprovalhandler(userapprovalhandler);         return admincontroller;     }      // url, need change it?     private photoinfo createphoto(string id, string userid) {         photoinfo photo = new photoinfo();         photo.setid(id);         photo.setname("photo" + id + ".jpg");         photo.setuserid(userid);         photo.setresourceurl("/org/springframework/security/oauth/examples/sparklr/impl/resources/"                 + photo.getname());         return photo;     }      @override     public void configuredefaultservlethandling(             defaultservlethandlerconfigurer configurer) {         configurer.enable();     }      @bean     public photoserviceusercontroller photoserviceusercontroller(             photoservice photoservice) {         photoserviceusercontroller photoserviceusercontroller = new photoserviceusercontroller();         return photoserviceusercontroller;     }      @bean     public photocontroller photocontroller(photoservice photoservice) {         photocontroller photocontroller = new photocontroller();         photocontroller.setphotoservice(photoservice);         return photocontroller;     }      @bean     public accessconfirmationcontroller accessconfirmationcontroller(             clientdetailsservice clientdetailsservice,             approvalstore approvalstore) {         accessconfirmationcontroller accessconfirmationcontroller = new accessconfirmationcontroller();         accessconfirmationcontroller                 .setclientdetailsservice(clientdetailsservice);         accessconfirmationcontroller.setapprovalstore(approvalstore);         return accessconfirmationcontroller;     }  /*  @bean     public viewresolver viewresolver() {         internalresourceviewresolver viewresolver = new internalresourceviewresolver();         viewresolver.setviewclass(jstlview.class);         viewresolver.setprefix("/web-inf/views/");         viewresolver.setsuffix(".jsp");          return viewresolver;     }*/      @override     public void addresourcehandlers(resourcehandlerregistry registry) {         registry.addresourcehandler("/resources/**").addresourcelocations(                 "/resources/");     }  } 

so, have @componentscan interacts @controller on controllers + still create @bean's those?

as first step try remove @beans , try inject dependencies using @autowired on controllers' constructors. @componentscan should recognize @controller, inject dependencies , use @requestmapping without issues.