如何将数据从数据库传递到JSF页面？

Question

I want to pass data from database to JSF page as a table. I know that I can use ArrayList but I need more efficient way because I have database tables with 2000+ rows and more. I;m not sure but the ArrayList will consume too much memory. Is there more memory efficient way to send the data to the JSF page?

PS maybe using pagination?

Answer 1

You can start with a simple PrimeFaces - DataTable - Pagination Example... its really simple and efficient...

DataTable has built-in support for ajax pagination.

Then if you will deal with really huge data you can take a look at a more advanced example.

Take a look at the PrimeFaces DataTable - Lazy Loading example

DataTable has built-in support to deal with huge datasets. In order to enable lazy loading, a LazyDataModel needs to be implemented to query the datasource when pagination, sorting, filtering or live scrolling happens

And here is a link to all PrimeFaces Datatable ability's

Answer 2

With Richfaces you can use database backed pagination. There is a bunch of example/tutorials if you search for richfaces pagination. Here is one that looks promising:

http://www.myjeeva.com/2011/04/do-jsfrichfacesseam-lazydynamic-data-loading-pagination/