Servlet
Example 2
The
servlet is setup here to read the configuration data from
a text file and the graph data from a server side process,
in this case a Java Servlet running on our web server.
and
here is the HTML code,
<img
src="http://localhost:8080/servlet/HbarchartServlet?
config=http://www.jpowered.com/bar_graph/hbargraph/Examples/barprops.txt&
data=http://www.jpowered.com/siriusjava/servlet/DataServlet"
width="450" height="420">
The
DataServlet ( click
here to view code ) is a simple servlet designed to
demonstrate how a servlet can be used to return data to
either the graphing applet or servlet. As you will see the
main routine ( doGet() ) uses the method GraphData() to
construct the return data. Although in this example the
GraphData() routine simply builds the return data from 'hard
coded' values, in practice this routine would be expanded
to first gather data from any number of datasources. eg.
databases, files other server processes.
For
a full explanation of and range of values for the above
parameters please see the Documentation.
Note:
If you are using the evaluation version then in the applet
a pop-up window will appear upon the startup and an evaluation
message will be incorporated by the servlet. Both these
features have been removed from the licensed version.
Licensing information can be found at
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