Struts2 jfreechart example

struts2 插件机制支持jfreechart . http://cwiki.apache.org/WW/jfreechart-plugin.html

Chart example in struts.xml

 

<action name="viewModerationChart" class="myapp.actions.ViewModerationChartAction">
  <result name="success" type="chart">
    <param name="width">400</param>
    <param name="height">300</param> 
  </result>
</action>

 

 

Struts Action that provides a chart

public class ViewModerationChartAction extends ActionSupport { 
private JFreeChart chart; 
public String execute() throws Exception { 
// chart creation logic... XYSeries dataSeries = new XYSeries(new Integer(1));
 //pass a key for this serie for (int i = 0; i <= 100; i++) {
 dataSeries.add(i, RandomUtils.nextInt()); } 
XYSeriesCollection xyDataset = new XYSeriesCollection(dataSeries); 
ValueAxis xAxis = new NumberAxis("Raw Marks"); 
ValueAxis yAxis = new NumberAxis("Moderated Marks"); 
// set my chart variable chart = new JFreeChart( "Moderation Function", JFreeChart.DEFAULT_TITLE_FONT, new XYPlot( xyDataset, xAxis, yAxis, new StandardXYItemRenderer(StandardXYItemRenderer.LINES)), false);
 chart.setBackgroundPaint(java.awt.Color.white);
 return super.SUCCESS; 
} 
public JFreeChart getChart() { 
return chart;
 }
 }