How to process Exception in DAO?

Yashnoo · **Joined:** Wed Dec 17, 2003 4:24 am **Posts:** 188

Hi everyone:

I want to know how to process Exception in DAO layer. For example.there are two method to do this:
one method:

Code:

public class PersonDAOImpl implements PersonDAO{ 
    
       public void updatePerson(Person p){ 
             ........................................... 
             try{ 
                       session.update(p); 
                       tx.commit(); 
                  }catch(HibernateException ex){ 
                          tx.rollback(); 
                          ex.printStackTrace(); 
                    }finally{ 
                            session.close(); 
                      } 
                  .................................... 

Two method:

Code:

public void updatePerson(Person p){ 
             ........................................... 
             try{ 
                       session.update(p); 
                       tx.commit(); 
                  }catch(HibernateException ex){ 
                         throw new MyException("HibernateEx"); 
                    }

If I use the first one,I can't catch the Exception in Servlet ,So I can't send redirect to the specific error page.
Which is better ? Shoud I process exception in DAO Layer or web layer? Thks!