Read Rick's ibatis tutorial, it covers DAO quite well: http://reumann.net/struts/ibatisLesson1.do
On Sun, 30 Jan 2005 09:57:03 -0700, Wendy Smoak <[EMAIL PROTECTED]> wrote: > From: "Brandon Mercer" <[EMAIL PROTECTED]> > > They both talk about accessing information from a database and DAO and DTO > > and all that jazz and quite frankly I don't understand it. :-P > > This should explain the DAO and DTO references: > http://java.sun.com/blueprints/corej2eepatterns/Patterns/DataAccessObject.html > > This is the pattern I used to write my data access layer. But I'm unlucky > in that my database is weird and SQL/JDBC doesn't work well with it. It has > a proprietary API, so I had to write all the DAO classes myself. It looks > like you have a normal SQL database, so you could use one of the persistence > frameworks like Hibernate if you wanted. > > What you've got so far looks pretty good! From your intro I expected to see > JDBC in the Action code, but you have it separated out. :) > > Is 'BillPayForm' Struts form bean? If so, [IMO] you should get it out of > your BillpayData class. (The data access classes shouldn't know about > Struts or HTTPRequests.) You might also consider having the data access > class "know" how to get its own connection rather than passing one in. I > use a static Factory, but you can [I hear] configure a Datasource in the > Servlet container and then any class should be able to look it up [JNDI??]. > > The magic of BeanUtils looks like this: > > Person person = personDAO.read( "012345" ); > BeanUtils.copyProperties( form, person ); > > That prepopulates the form for display. > When the user has submitted his changes, you go back the other way: > > BeanUtils.copyProperties( person, form ); > personDAO.update( person ); > > -- > Wendy Smoak > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
