i new spring , try catch request using handler method. problem can not reach handler method.
@requestmapping(value = "/gsafeedrun", method = requestmethod.get) public modelandview handlerequest(@modelattribute baseformbean formbean, bindingresult result, httpservletrequest request) throws exception { system.out.println("request grabbed!\n"); getcontext().getuserprofile().setlanguage(projectconstants.getlanguage_tr()); createsessiondata(request); final java.io.file myfile = new java.io.file("c:\\devel\\xmlcollections.txt"); readcollectionofroots(myfile); //read list of desired root's lists file return null; } i've checked servlet.xml file , seems ok. request localhost:8080/abc/gsafeedrun never answered , displays on console:
***error... page-not-found.jsp - 404 - /abc/gsafeedrun i need clarify there no need return model view user. controller supposed calculations.
what reason of problem?
is not possible send null.
the following return types supported handler methods:
a modelandview object (servlet mvc or portlet mvc), model implicitly enriched command objects , results of @modelattribute annotated reference data accessor methods.
a model object, view name implicitly determined through requesttoviewnametranslator , model implicitly enriched command objects , results of @modelattribute annotated reference data accessor methods.
a map object exposing model, view name implicitly determined through requesttoviewnametranslator , model implicitly enriched command objects , results of @modelattribute annotated reference data accessor methods.
a view object, model implicitly determined through command objects , @modelattribute annotated reference data accessor methods. handler method may programmatically enrich model declaring model argument (see above).
a string value interpreted view name, model implicitly determined through command objects , @modelattribute annotated reference data accessor methods. handler method may programmatically enrich model declaring modelmap argument (see above).
@responsebody annotated methods (servlet-only) access servlet response http contents. return value converted response stream using message converters.
an httpentity or responseentity object (servlet-only) access servlet response http headers , contents. entity body converted response stream using message converters.
an httpheaders object return response no body.
a callable used spring mvc obtain return value asynchronously in separate thread transparently managed spring mvc on behalf of application.
a deferredresult application uses produce return value in separate thread of own choosing, alternative returning callable.
a listenablefuture application uses produce return value in separate thread of own choosing, alternative returning callable. void if method handles response (by writing response content directly, declaring argument of type servletresponse / httpservletresponse / renderresponse purpose) or if view name supposed implicitly determined through requesttoviewnametranslator (not declaring response argument in handler method signature; applicable in servlet environment).
any other return type considered single model attribute exposed view, using attribute name specified through @modelattribute @ method level (or default attribute name based on return type's class name otherwise). model implicitly enriched command objects , results of @modelattribute annotated reference data accessor methods.
from documentation: requestmapping
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