CeWolf and JSP

[claudio]

Hi, I'm Claudio, I'm a student and I want to use ceWolf for my graphs
in JSP pages. I visited the web site http://cewolf.sourceforge.net/
and i followed each pass of the tutorial but I don't visualize the
chart, there is an exeption: NullPointerException in cewolf_jsp.java
row 202:
int _jspx_eval_cewolf_img_0 = _jspx_th_cewolf_img_0.doStartTag();


In the JSP, if I delete this row:
<cewolf:img chartid="line" renderer="cewolf" width="400"
height="300"/>
all go ok, but obviously there isn't the chart.

Could you help me, please!
Thanks, Claudio

 

[proximuss]

Well, this is a one of many errors that are unknown for me. Do you using
LINUX/UNIX ?. Because under this OS cewolf does not works good.
(Maybe now yes : )

Go to cewolf page>faq an read more.

My terminal project broke at charts, because server, on wich is my webapp
is LINUX server.

If you are using or Windows, try reload application more than once and
restart jsp/servlet engine.
But most important is "good" wroten web.xml, like
in cewolf example "cewolf.war", download it ...


If still nothing,
try "jfreechart" or "charting" or any other library.

Hi, proximuss from Slovakia ...