Usually a JSF page is backed by a managed bean. You request data through Expression Language (EL) expressions, like:
The managed bean would probably be called MyBean.java, though you can call it anything you want. It would have a getter method, getUnitsSold(), and in there you'd retrieve the data any way that you normally retrieve data in Java ... read it from a file, a direct JDBC call to a database, call to an EJB, load it through Hibernate, etc. It's a good idea for the getter to just load data once and hold onto it for the scope of the bean, or at least the request. JSFs tend to call the getters over and over, and you don't want to keep loading the same data.
JSF does not directly support data searches or database interfacing. Its primary purpose is to manage the UI, where it transfers data to and from the client viewer (web browser) using the Model/View/Controller paradigm and initiates actions based on UI operations. The action processing itself is standard application logic and can be whatever you want.
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Joined: Oct 24, 2013
did you have any example of coding related on how to search data from database?
basically, my problem is how to read/scan text that user paste in textarea then how can i match the data that user paste in textarea with existing data in database?
really need your help ..
JSF will handle getting the text area data into a backing bean and it will invoke an action method when the form is submitted.
The actual database lookup code is up to you. If you need help on that, we have database forums. If you are looking for a free-form text search, the popular choice is Apache Lucene. It's what the CodeRanch uses.