java - Difference between SessionFactory.openSession() & SessionFactory.getCurrentTransaction().commit() -

what happen if close session session.getcurrenttransaction().commit() or close session session.close() @ end of method?

public static void deleteyear(years year) {     session session = sessionfactory.opensession();     session.begintransaction();     session.delete(year);             // best way close session     session.gettransaction().commit();             //or : session.close(); ??? } 

asaik, these 2 entirely different operations.

sessionfactory.opensession(): opens session

session.begintransaction(): begins transaction, transaction atomic unit of work should succeed or fail entirely.

session.gettransaction().commit(): commit transaction, means things happened between begintransaction , call persisted database. if doesn't commit transaction changes happened in transaction lost. commiting transaction deosn't close session

session.close(): closes session , releases acquired resources.

that means need call both commit() , session.close().

public static void deleteyear(years year) {     session session = sessionfactory.opensession();     session.begintransaction();     session.delete(year);     session.gettransaction().commit();     session.close(); }