jfreeChart折线图，如何显示节点数据呢？
如题
[解决办法]
import java.awt.*;import java.awt.geom.Rectangle2D;import org.jfree.chart.ChartFactory;import org.jfree.chart.ChartPanel;import org.jfree.chart.JFreeChart;import org.jfree.chart.labels.StandardXYItemLabelGenerator;import org.jfree.chart.labels.ItemLabelAnchor;import org.jfree.chart.labels.ItemLabelPosition;import org.jfree.chart.title.TextTitle;import org.jfree.chart.axis.NumberAxis;import org.jfree.chart.plot.*;import org.jfree.chart.renderer.category.LineAndShapeRenderer;import org.jfree.chart.renderer.xy.XYItemRenderer;import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;import org.jfree.data.category.CategoryDataset;import org.jfree.data.category.DefaultCategoryDataset;import org.jfree.data.time.Month;import org.jfree.data.time.TimeSeries;import org.jfree.data.time.TimeSeriesCollection;import org.jfree.ui.ApplicationFrame;import org.jfree.ui.RefineryUtilities;import org.jfree.ui.TextAnchor;import org.jfree.ui.RectangleInsets;/** * A line chart demo showing the use of a custom drawing supplier. * */public class LineChartDemo2 extends ApplicationFrame{ /** * Creates a new demo. * * @param title the frame title. */ public LineChartDemo2(final String title) { super(title); TimeSeries timeSeries = new TimeSeries("阿蜜果blog访问量统计", Month.class);//时间曲线数据集合 TimeSeriesCollection lineDataset = new TimeSeriesCollection();//构造数据集合 timeSeries.add(new Month(1, 2007), 11200); timeSeries.add(new Month(2, 2007), 9000); timeSeries.add(new Month(3, 2007), 6200); timeSeries.add(new Month(4, 2007), 8200); timeSeries.add(new Month(5, 2007), 8200); timeSeries.add(new Month(6, 2007), 12200); timeSeries.add(new Month(7, 2007), 13200); timeSeries.add(new Month(8, 2007), 8300); timeSeries.add(new Month(9, 2007), 12400); timeSeries.add(new Month(10, 2007), 12500); timeSeries.add(new Month(11, 2007), 13600); timeSeries.add(new Month(12, 2007), 12500); lineDataset.addSeries(timeSeries); JFreeChart chart = ChartFactory.createTimeSeriesChart("访问量统计时间线", "月份", "访问量", lineDataset, true, true, true);//设置子标题 TextTitle subtitle = new TextTitle("2007年度", new Font("黑体", Font.BOLD, 12)); chart.addSubtitle(subtitle);//设置主标题 chart.setTitle(new TextTitle("阿蜜果blog访问量统计", new Font("隶书", Font.ITALIC, 15))); chart.setAntiAlias(true); XYPlot plot = (XYPlot) chart.getPlot(); XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)plot.getRenderer();//设置网格背景颜色 plot.setBackgroundPaint(Color.white);//设置网格竖线颜色 plot.setDomainGridlinePaint(Color.pink);//设置网格横线颜色 plot.setRangeGridlinePaint(Color.pink);//设置曲线图与xy轴的距离 plot.setAxisOffset(new RectangleInsets(0D, 0D, 0D, 10D));//设置曲线是否显示数据点 xylineandshaperenderer.setBaseShapesVisible(true);//设置曲线显示各数据点的值 XYItemRenderer xyitem = plot.getRenderer(); xyitem.setBaseItemLabelsVisible(true); xyitem.setBasePositiveItemLabelPosition(new ItemLabelPosition(ItemLabelAnchor.OUTSIDE12, TextAnchor.BASELINE_LEFT)); //下面三句是对设置折线图数据标示的关键代码 xyitem.setBaseItemLabelGenerator(new StandardXYItemLabelGenerator()); xyitem.setBaseItemLabelFont(new Font("Dialog", 1, 14)); plot.setRenderer(xyitem); final ChartPanel chartPanel = new ChartPanel(chart); chartPanel.setPreferredSize(new Dimension(500, 270)); setContentPane(chartPanel); } /** * Starting point for the demonstration application. * * @param args ignored. */ public static void main(final String[] args){ final LineChartDemo2 demo = new LineChartDemo2("Line Chart Demo 5"); demo.pack(); RefineryUtilities.centerFrameOnScreen(demo); demo.setVisible(true); }}