A web application is made up of pages. A page consists of presentation elements and programming logic.
- Presentation elements (JSP Page). The presentation
of a page is in a JSP page. This page is the interface to
the user and can include components and static
text. The JSP page is stored in a .jsp file and is
called a page.
- Programming logic (Java Class).
The programming and business logic for your page is written in the Java language and is
stored in a .java file called a page bean. This file includes
event handling and initialization logic for the page. By default, the programming and
business logic is in a single Java file.
The IDE automatically keeps the JSP page and Java code synchronized. For example, if you make a change in a .java file, the change is reflected in the .jsp file.
The following illustration shows the parts of a page:
Viewing and Managing Pages
You can edit the visual representation of the page in the following ways:
- In Design view. When the IDE creates a new page, the Visual
Designer opens in Design view. Drag components to the page in
Design view.
- In JSP view. At the top of the Visual Designer, click the
JSP button to view or edit the JSP source file for the page. The IDE generates the JSP code and maintains it as you make changes to component properties in Design view. Unless you want to perform an advanced function not supported by the Visual Designer, it is not likely that you will need to edit the JSP page directly.
- In Design view, click the Java button at the top of the page to open the Java
Editor.
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