On 9/21/07, A. Lotfi <[EMAIL PROTECTED]> wrote: > > Hi, > I need to populate a form with data from database, is there any example. > > thank you your help is appreciated.
Probably are a ton of them. (Here's one for Struts1.x using iBATIS http://www.learntechnology.net/content/ibatis/spring_ibatis.jsp ). In Struts1, I basically do this... 1) Struts action method calls a businessDelegate/serviceClass to get your object. (Just something to abstract a way the dao call to the database - but for rapid development you could even skip this class if you want.) 2) Delegate calls your DAO (data access object) to get back your object from the database. 3) You then populate your ActionForm from this object. There are several ways to do this. First off it's a good idea to make your ActionForm property names match up with the value object names you returned in your object in step 2. (ie an EmployeeActionForm has property firstName, and your Employee value object has property name firstName.) Typicall then in your Action class you can use BeanUtils (commons package) to do: Employee employee = employeeDelegate.getEmployee(employeeID); BeanUtils.copyProperties( employeeActionForm, employee ); You're done. (There are a few caveats to using BeanUtils which can be quite annoying but you can worry about them later:) A side note, I actually have changed where I populate my ActionForm and return the value object. Instead of doing the above in the Action class, I add two methods to my ActionForm... populateForm(Employee emp ) { //takes care of some code like above } populateEmployee(Employee emp) { //populates an Employee object from the form data } I just found it cleaner to do there, especially when some odd cases come up that require some special handling, such as when maybe you can't easily use BeanUtils for everything.) -- Rick
