struts2中 JFreeChart使用

添加3个包

struts2-jfreechart-plugin-2.3.16.3.jar

jcommon-1.0.16.jar

jfreechart-1.0.13.jar

struts.xml中配置

查看struts2-jfreechart-plugin-2.3.16.3.jar中的struts-plugin.xml文件

查看其中的定义的东西 然后写着struts.xml中

     <package name="freechart" extends="jfreechart-default">
         <action name="freechart" class="cn.itcast.chart.MyFreeChart">

                 <result type="chart" name="success" >
                     <param name="height">800</param>
                     <param name="width">600</param>
                 </result>
         </action>
     </package>

写Action

 package cn.itcast.chart;

 import java.io.Serializable;

 import org.jfree.chart.JFreeChart;
 import org.jfree.chart.axis.NumberAxis;
 import org.jfree.chart.axis.ValueAxis;
 import org.jfree.chart.plot.XYPlot;
 import org.jfree.chart.renderer.xy.StandardXYItemRenderer;
 import org.jfree.data.xy.XYSeries;
 import org.jfree.data.xy.XYSeriesCollection;

 import com.opensymphony.xwork2.ActionSupport;

 public class MyFreeChart extends ActionSupport implements Serializable {
     private JFreeChart chart;

     public JFreeChart getChart() {
         return chart;
     }
     public String execute(){
         ValueAxis xAxis = new NumberAxis("年度");
         ValueAxis yAxis = new NumberAxis("产值");
         XYSeries xySeries = new XYSeries("绿豆");
         xySeries.add(0,300);
         xySeries.add(1,200);
         xySeries.add(2,400);
         xySeries.add(3,500);
         xySeries.add(4,600);
         xySeries.add(5,500);
         xySeries.add(6,800);
         xySeries.add(7,1000);
         xySeries.add(8,1100);
         XYSeriesCollection xyDataset = new XYSeriesCollection(xySeries);
         XYPlot xyPlot = new XYPlot(xyDataset,xAxis,yAxis,new StandardXYItemRenderer(StandardXYItemRenderer.SHAPES_AND_LINES));
         chart = new JFreeChart(xyPlot);
         return SUCCESS;
     }
 }

就能返回图表