struts2学习笔记8-与JFreeChart的整合

首在在Action类里面必须有

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;   
    }   
  //一定要提供这个方法，而且一字不错的提供
    public JFreeChart getChart() {   
        return chart;   
    }   
  
}  

然后在配置文件下面

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

加入jfreechart,jcommon,struts2-jfreechart-plugin的JAR包

最后把struts2-jfreechart-plugin.jar里面的插件的配置改了

<!--这样方便使用-->
<struts>
    <package name="jfreechart-default" extends="struts-default">    	<result-types>
                 <result-type name="chart" class="org.apache.struts2.dispatcher.ChartResult">
    			<param name="height">150</param>
    			<param name="width">200</param>
    		</result-type>
    	</result-types>
    </package>
</struts>

http://struts.apache.org/2.x/docs/jfreechart-plugin.html