WebSphere Application Server - IBM Redbooks

Java package: During the wizard you will have a chance to create a front
controller for the Web pages. The front controller is a servlet and therefore will
be compiled into a class. The Java package determines where the class is
stored. If you leave this blank, default package is used.
SQL Statement Type: The SQL statement type determines the type of SQL
statements that will be created.
The choices are:
– Select statement
– Update statement
– Insert statement
– Delete statement
In this case since we are querying the database, we choose Select
statement.
Model: The model options determine the type of pages that will be created.
The options you can choose from depend on the SQL statement type you
selected. You can see a description of the option you have selected in the
Description area below the model field.
Since we have specified Select Statement as our SQL statement type, we
have the following model options:
– IBM Database Access Tag Lib - Select Statement
Using this choice, a select is done against the database for information,
which is then displayed in table format to the user. There is no need to
allow the user to select an item for further details. Database access is
handled using the JSPSQL tag library.
– IBM Database Access Tag Lib - Master Details Pattern
This is similar to the previous pattern, except the database information is
displayed in two-tiers. The first database select retrieves high-level
information and displays the records in a table format. The user can then
select an entry to get further details. This pattern also accesses the
database using the JSPSQL tag library.
– IBM Database Access JavaBeans - Master Details Pattern
This is similar to the tag library master details pattern with the exception
that it uses JavaBeans instead of tag libraries to access the database.
While the tag library patterns fit more into the Model 1 category of design,
the JavaBeans pattern is more of a Model 2 type of design. This gives the
flexibility of manipulating the data before it is displayed in the JSP.
In our example we select IBM Database Access Tag Lib - Master Details
Pattern.
176 IBM WebSphere Application Server - Express V5.0.2 Developer Handbook