java - nullpointer exception when querying database -

i trying query database hibernate project

public class feedinputparamsdaoimpl implements ifeedinputparamsdao {  @autowired private sessionfactory sessionfactory;  public void setsessionfactory(sessionfactory sessionfactory) {     this.sessionfactory = sessionfactory; }  private int batch_size = 50;  public session getsession() { /*null pointer exception*/session session = sessionfactory.opensession();     return session; }       @override public list<feedinputparams> getallfeedinputparamslist (int feedkey) {     string querystring = "from feedinputparams feedinputparams feedinputparams.feedkey > ?";     session session =  getsession();     query query = session.createquery(querystring);     query.setparameter(0, feedkey);     list<feedinputparams> feedinputparamslist = query.list();     return feedinputparamslist; }  } 

and getallfeedinputparamslist (int feedkey) called method

  public void readfile()         throws exception {       feedinputparamsdaoimpl feedinputparamsdaoimpl=new feedinputparamsdaoimpl();     list<feedinputparams> feedinputparamslist=feedinputparamsdaoimpl.getallfeedinputparamslist(0);     system.out.println("feedinputparamslist...."+feedinputparamslist);  } 

i getting null pointer exception

java.lang.nullpointerexception @ com.vxl.appanalytix.dao.impl.feedinputparamsdaoimpl.getsession(feedinputparamsdaoimpl.java:28)   @ com.vxl.appanalytix.dao.impl.feedinputparamsdaoimpl.getallfeedinputparamslist(feedinputparamsd0impl.java:44)  @ 

sessionfactory null - not autowired spring reason. have annotation on feedinputparamsdaoimpl class?