about this package
This package contains several kinds of HTTP servlets that demonstrate:
- how to use htmlKona classes to create HTML pages in servlets
- how to use WebLogic jDriver JDBC drivers and dbKona in servlets to retrieve and
with your server-side servlet.
- Servlets you can run without a database
- HelloWorld and HelloUniverse are very
simple servlets that use htmlKona to display static data.
- SimpleFrame and SimplePage also illustrate
basic htmlKona page-building concepts.
- InputWithForms shows you how to use forms to capture
to get user input, and how to use a scripting language with htmlKona
for client-side processing.
- ImageMap shows you how to set up an ImageMap
- AppletLoader demonstrates how to use htmlKona to
create a servlet that loads an applet.
- Servlets that require a database or some external data. To run
these examples you'll need an Oracle instance DEMO with the table
"emp". The defaults class is used by many of the servlets in
this group. You can change database-specific properties once in the
defaults class, recompile the directory, and not have to edit
every file that uses a database connection.
- SimpleDBLogin shows how to login to a database.
- SimpleQueryDisplay uses dbKona and htmlKona to retrieve
and display database data.
- InsertUpdateDelete shows how to do three common database
tasks and display the results.
- DisplayByKeyDef uses a dbKona KeyDef object to update
and delete database records.
- InteractiveQuery shows how to take user input and
use it to retrieve data for display.
- DataSetToPage is an HTML page produced by reading page
data stored in a database.
- DataMerge and TableDataMerge illustrate how
you can merge database data with a preexisting HTML file for display.
- StoredProcResults shows how to use a stored procedure
for processing and then display the results in an HTML page.
- ImageDataDisplay, ImageByKeyDisplay, and
AudioDataDisplay show how to read image and audio formats
in from external sources for display in an HTML page.
how to use this package
- Check the defaults class for variables that you should
change. This class is used by most of the examples in this directorty to make
default database connections and set up servlet pages. You may need to change
the connections it makes to your database.
- In a new command shell, run the setEnv.cmd script, then change to
the ...\examples\htmlKona directory and compile all of the Java
servlets using the command line:
$ javac -d %SERVLET_CLASSES% *.java
- Register the ClasspathServlet
in the weblogic.properties file to
enable the WebLogic Server to deploy classes to applets.
- Place static pages such as "extdoc.html" and
"formletter.html" in the document root
of your WebLogic Server.
- For the AppletLoader example, obtain an applet (like the Blink from Sun),
compile it, and place its class file in the SERVER_CLASSES directory on your WebLogic Server host.
- Register each servlet in the weblogic.properties
file for the WebLogic Server, as shown in this example:
is the class name of the servlet and
is the full package name.
Here's an example:
Note that a property entry can't contain white spaces.
- Make sure your database is available. (The SQL for the "emp" table
is in the examples/applet directory in the "emp.sql" file.)
- Start the WebLogic Server. If you're running your WebLogic Server on the
same machine as you will use to load the servlets in a browser, make sure
that the browser doesn't have a CLASSPATH set.
- Call each servlet from your browser, with a URL after the pattern:
where WebLogicURL is the WebLogic Server's host, WebLogicPort
is the port at which WebLogic is listening for login requests, and
virtualName is the registered name of a servlet. For example:
there's more . . .
We use several WebLogic APIs in these examples. Check out these
Developers Guides for more about WebLogic's integrated development