Adding Form Input Controls - Stripes...and Java Web Development is Fun Again - page 155

provides contains List of

FolderDao Folder Message

FolderTypeConverter MessageTypeConverter

Id
"1"

Id
"1"

Figure 8.1: Folders and messages

• The FolderDao interface defines methods to manage folders and the
messages they contain. MockFolderDao is an implementation that
contains a few fictitious messages so that we see something when
trying the example.

• FolderTypeConverter converts a String ID to a Folder , while Message-
TypeConverter does the same for a Message . With these type con-
verters, we can use ID parameters in forms and the Folder and
Message property types in action beans. We discussed this tech-
nique in Section 5.4 , Using a Type Converter and Formatter to Load
Model Objects, on page 117 .

Let's get to using form input controls, starting with checkboxes.

8.1 Checkboxes

The Message List page, shown in Figure 8.2 , on the next page, allows
the user to select a folder on the left and view the messages that are in
that folder. The list of messages includes links to view the details of a
message. There's also a column of checkboxes on the left, allowing the
user to select messages. With the controls at the bottom, the user can
delete the selected messages or move them to a different folder.

The MessageListActionBean class is the action bean associated to this
page, with a default event handler that forwards to message_list.jsp . This
JSP renders the page.