隨筆檔案

public class JFreeChart1 extends HttpServlet {

?private static final long serialVersionUID = 1L;

?public JFreeChart1() {
??super();
?}

?public void doGet(HttpServletRequest request, HttpServletResponse response)
???throws ServletException, IOException {
??doPost(request, response);
?}

?public void doPost(HttpServletRequest request, HttpServletResponse response)
???throws ServletException, IOException {

??TimeSeries xyseries = new TimeSeries("finince income", Month.class);

??TimeSeriesCollection xyseriescollection = new TimeSeriesCollection();
??xyseriescollection.addSeries(xyseries);

??JFreeChart jfreechart = ChartFactory.createTimeSeriesChart("Example",
????"y", "x", xyseriescollection, true, true, true);
??jfreechart.setBackgroundPaint(Color.white);
??XYPlot xyplot = jfreechart.getXYPlot();

??xyplot.setNoDataMessage("no data to display");//?此名可用來做當沒有數據的時候jfreechart面板上的顯示
??
????StandardEntityCollection sec = new StandardEntityCollection();
??ChartRenderingInfo info = new ChartRenderingInfo(sec);

??ChartUtilities.writeChartAsPNG(response.getOutputStream(), jfreechart,
????600, 400, info);
?}

}

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文章來源:http://java-jun.javaeye.com/blog/602654