I am generating a bar graph in my struts 2 application using JFreeChart; but even if I have enabled the tooltips, they don't work in the bar graph generated. I am not able to figure out how to make the tooltips work? This is my code:
public class ChartAction extends ActionSupport {
private static final long serialVersionUID = 1L;
private JFreeChart chart;
public JFreeChart getChart() {
return chart;
}
public String createRBar() throws Exception {
// chart creation logic..
System.out.println("IN CHART ACTION");
try
{
BarChart barChart=new BarChart();
{
chart=barChart.generateRegionBar();
return SUCCESS;
}
}catch(Exception e)
{
e.printStackTrace();
}
return "error";
}
}
public class BarChart {
public JFreeChart generateRegionBar(){
try{
DefaultCategoryDataset dataset =new DefaultCategoryDataset();
dataset.setValue(80, "marks1", "student1");
dataset.setValue(20, "marks2", "student2");
dataset.setValue(50, "marks3", "student3");
dataset.setValue(70, "marks4", "student4");
JFreeChart chart=ChartFactory.createBarChart("student graph","student name", "student marks",dataset, PlotOrientation.VERTICAL, true, true, true);
return chart;
}catch (Exception e) {
e.printStackTrace();
return null;
}
}
}
This is my struts.xml:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd ">
<struts>
<package name="jfree" extends="jfreechart-default">
<action name="generateRPGraph" class="gr3.jfree.controller.ChartAction"
method="createRBar">
<result name="success" type="chart">
<param name="width">550</param>
<param name="height">300</param>
</result>
</action>
</package>
</struts>
