Use of jfreechart

643358981325

Now I need to make a pie chart or a histogram, check some information, use jfreechart, but I do n’t know how to use it.
Copy the three jar packages to the lib, and then register it in web.xml, can it be used? Is it a bit confused, can anyone explain the configuration and use of jfreechart clearly?

643358981325

DefaultPieDataset dataset = new DefaultPieDataset ();
dataset.setValue ("Apple", 100);
dataset.setValue ("Pear", 200);

Why does the dataset not have the setValue method, it always reports an error

saki520

Find the jar package and configure the web. xml will do

643358981325

Configured, now my entire struts program can't be used

643358981325

Why can't the whole program of jfreechart be configured in web.xml?

bevande

DefaultPieDataset dataset = new DefaultPieDataset();
dataset.setValue("Apple", 100);
dataset.setValue("Pear", 200);

This is the old usage, go to the new version of the api or find the old version of jar

643358981325

A problem now is that the configuration of jfreechart is added to the web.xml of struts, jfreechart is available, but my program can not enter, and always report the error of Servlet action is not available. I don’t know what is going on.

643358981325

The problem has been solved

643358981325

I also want to ask, how do I want to display the percentage, I use the 1.0.3 version, there is no class in the 1.0.0 version,
plot.setLabelGenerator(new StandardPieItemLabelGenerator(StandardPieItemLabelGenerator.DEFAULT_TOOLTIP_FORMAT));

plot.setLegendLabelGenerator(new StandardPieItemLabelGenerator("{0}: ({1}M, {2})"));

The StandardPieItemLabelGenerator class is not available in version 1.0.3