jsp / servlet / dao / javabeans

[mark smith]

hi

i have a little local web site with jsp /servlet, i created a bean...... and a dao... what is the best way to use the dao?
in the servet take the jsp parameter, populate the bean and send the bean to dao?

thanks

[Stan James]

I think this kind of thing is typical

   Browser      Servlet        JSP        Session        POJO         Bean         DAO        Database
 ------------ ------------ ------------ ------------ ------------ ------------ ------------ ------------
      Post/Get
      +------------>
                   GetParameters from request
                   <-+
                   doBusiness(parameters)
                   +-------------------------------------->
                                                          getData(parameters)
                                                          +------------------------->
                                                                                    query or update
                                                                                    +------------>
                                                          Bean
                                                          <-------------------------+
                   Bean
                   <--------------------------------------+
                   put(Bean)
                   +------------------------->
                   ForwardTo
                   +------------>
                                get("Bean")
                                +------------>
                                getFields()
                                +-------------------------------------->
      HTML
      <-------------------------+

The POJO (Plain Old Java Object) is there to move "business logic" out of the servlet and JSP.

Some interesting guidelines: servlet is all Java, uses request & response, no HTML. JSP is all HTML & tags, no Java. POJO is all Java, no HTML, no HTTP* imports.

Editing: I just spotted that you were talking about a bean to hold the parameters that came in on the request. That's perfectly cool, too. I made mine hold the results we got back from the database on a query so we could have several beans involved in this thing.

Does that makes sense?
[ September 05, 2006: Message edited by: Stan James ]

[marc weber]

Moving to the JDBC forum.

[mark smith]

thank, you help me a lot with your schema