java ee - Factory class with database connection in spring -

i need write factory class calls database , stores data static object. know how write normal java. not able in spring. able pattern, not getting database connection when "factory-method" called. below code

public class applicationsettingsdao {  private static applicationsettingsdao objsettings = null; // new applicationsettingsdao();  @autowired private datasource datasource;  private applicationsettingsdao() {     getdbconncection(); }   public void setdatasource(datasource datasource) {     this.datasource = datasource; }  public datasource getdatasource() {     return this.datasource; }  public static applicationsettingsdao getinstance() {     if (objsettings == null) {         synchronized (applicationsettingsdao.class) {             if (objsettings == null) {                 objsettings = new applicationsettingsdao();             }         }     }     return objsettings; }  public void getdbconncection() {     system.out.println("datasource -> " + datasource);     try {         connection objconnection = datasource.getconnection();         preparedstatement objprepstatement = objconnection.preparestatement("select applicationsettingid, settingid, value applicationsetting");         resultset objresultset =  objprepstatement.executequery();         while(objresultset.next()) {             system.out.println("--> " + objresultset.getint("settingid") + " >> " + objresultset.getstring("value"));         }     } catch (sqlexception e) {         e.printstacktrace();     } } } 

bean configuration

<bean id="objsettings" class="com.schoolcity.stars.dao.common.applicationsettingsdao" factory-method="getinstance" >     <property name="datasource" ref="datasource"/> </bean> 

am not able datasource object on container startup. works if call

 applicationsettingsdao.getinstance().getdbconncection(); 

i need invoke getdbconncection() when getinstance() called.

thank you