java - How to retrieve,update,delete data from database using DAO method in Hibernate -

how retrieve,update,delete data database using dao method in hibernate.

my dao this:

package com.sample.common.impl;  import java.util.list; import com.sample.common.employee;  public interface employeedao {    public list<employee> getallemployee();         public void updateemployee(employee emp);    public void deleteemployee(employee emp); } 

my implementation class this:

package com.sample.common.impl; import java.util.arraylist; import java.util.list; import org.hibernate.sessionfactory; import com.sample.common.employee;  public class employeedaoimpl implements employeedao { private sessionfactory sessionfactory;  public list<employee> getallemployee() {             return null; }   public void updateemployee(employee emp) {       }  public void deleteemployee(employee emp) {        }    } 

how create query select,update , delete. can please suggest possible solution

you have update code below

public void deleteemployee(employee emp) {         session session = sessionfactory.getcurrentsession();         session.delete(emp);         logger.debug(emp.getclass());     }  public void updateemployee(employee emp) {         session session = sessionfactory.getcurrentsession();         session.update(emp);         logger.debug(emp.getclass());     }  public list<employee> getallemployee(){     string query ="select e employee e";   list<employee> emplist = session.createquery(query);        return emplist; } 

hope stuff works.