一、jFreeChart产生图形的流程 创建一个数据源（dataset）来包含将要在图形中显示的数据>>创建一个 JFreeChart 对象来代表要显示的图形>>把图形输出重要的类和接口：org.jfree.data.general.Dataset 所有数据源类都要实现的接口org.jfree.chart.ChartFactory 由它来产生 JFreeChart 对象org.jfree.chart.JFreeChart 所有对图形的调整都是通过它噢！！org.jfree.chart.plot.Plot 通过JFreeChart 对象获得它，然后再通过它对图形外部部分（例：坐标轴）调整注意：它有很多子类，一般都下嗍造型到它的子类！org.jfree.chart.renderer.AbstractRenderer 通过JFreeChart 对象获得它，然后再通过它对图形内部部分（例：折线的类型）调整。同样，针对不同类型的报表图，它有着不同的子类实现！在下面我们简称它为 Renderer下面我们结合不同类型的图形来具体分析这个流程。二、饼图饼图的dataset 一般是用PieDataset 接口，具体实现类是 DefaultPieDataset1、创建一个数据源（dataset）：private static PieDataset createDataset(){DefaultPieDataset defaultpiedataset = new DefaultPieDataset(); //注意是DefaultPieDataset！！defaultpiedataset.setValue(”One”, new Double(43.200000000000003D));defaultpiedataset.setValue(”Two”, new Double(10D));defaultpiedataset.setValue(”Three”, new Double(27.5D));defaultpiedataset.setValue(”Four”, new Double(17.5D));return defaultpiedataset;}2、由ChartFactory 产生 JFreeChart 对象private static JFreeChart createChart(PieDataset piedataset){JFreeChart jfreechart = ChartFactory.createPieChart(”Pie Chart Demo 1″, //图形标题名称piedataset, // datasettrue, // legend?true, // tooltips?false); //URLs?PiePlot pieplot = (PiePlot)jfreechart.getPlot(); //通过JFreeChart 对象获得 plot：PiePlot！！pieplot.setNoDataMessage(”No data available”); // 没有数据的时候显示的内容return jfreechart;}一些重要的方法：pieplot.setExplodePercent(0,0.3D) //把Lable 为”One” 的那一块”挖”出来30%3、输出略三、柱状图柱状图的dataset 一般是用CatagoryDataset接口(具体实现类是DefaultCategoryDataset),也会用 IntervalXYDataset接口1、创建一个数据源（dataset）：private static CategoryDataset createDataset(){String series1 = “First”;String series2 = “Second”;String series3 = “Third”;String category1 = “Category 1″;String category2 = “Category 2″;String category3 = “Category 3″;String category4 = “Category 4″;String category5 = “Category 5″;DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();defaultcategorydataset.addValue(1.0D, series1, category1);defaultcategorydataset.addValue(4D, series1, category2);defaultcategorydataset.addValue(3D, series1, category3);defaultcategorydataset.addValue(5D, series1, category4);defaultcategorydataset.addValue(5D, series1, category5);defaultcategorydataset.addValue(5D, series2, category1);defaultcategorydataset.addValue(7D, series2, category2);defaultcategorydataset.addValue(6D, series2, category3);defaultcategorydataset.addValue(8D, series2, category4);defaultcategorydataset.addValue(4D, series2, category5);defaultcategorydataset.addValue(4D, series3, category1);defaultcategorydataset.addValue(3D, series3, category2);defaultcategorydataset.addValue(2D, series3, category3);defaultcategorydataset.addValue(3D, series3, category4);defaultcategorydataset.addValue(6D, series3, category5);return defaultcategorydataset;}2、由ChartFactory 产生 JFreeChart 对象private static JFreeChart createChart(CategoryDataset categorydataset){JFreeChart jfreechart = ChartFactory.createBarChart(”Bar Chart Demo”, //图形标题名称“Category”,//domain 轴 Lable这里先简单理解为横坐标Lable好了“Value”, //range 轴 Lable这里也先简单理解为纵坐标Lable好了categorydataset, // datasetPlotOrientation.VERTICAL, //垂直显示true, // legend?true, // tooltips?false); //URLs?jfreechart.setBackgroundPaint(Color.white); //设定背景色为白色CategoryPlot categoryplot = jfreechart.getCategoryPlot(); //获得 plot：CategoryPlot！！categoryplot.setBackgroundPaint(Color.lightGray); //设定图表数据显示部分背景色categoryplot.setDomainGridlinePaint(Color.white); //横坐标网格线白色categoryplot.setDomainGridlinesVisible(true); //可见categoryplot.setRangeGridlinePaint(Color.white); //纵坐标网格线白色//下面两行使纵坐标的最小单位格为整数NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis();numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());BarRenderer barrenderer = (BarRenderer)categoryplot.getRenderer(); //获得renderer 注意这里是下嗍造型到BarRenderer！！barrenderer.setDrawBarOutline(false); // Bar的外轮廓线不画GradientPaint gradientpaint = new GradientPaint(0.0F, 0.0F, Color.blue,0.0F, 0.0F, new Color(0, 0, 64)); //设定特定颜色GradientPaint gradientpaint1 = new GradientPaint(0.0F, 0.0F, Color.green,0.0F, 0.0F, new Color(0, 64, 0));GradientPaint gradientpaint2 = new GradientPaint(0.0F, 0.0F, Color.red,0.0F, 0.0F, new Color(64, 0, 0));barrenderer.setSeriesPaint(0, gradientpaint); //给series1 Bar设定上面定义的颜色barrenderer.setSeriesPaint(1, gradientpaint1); //给series2 Bar 设定上面定义的颜色barrenderer.setSeriesPaint(2, gradientpaint2); //给series3 Bar 设定上面定义的颜色CategoryAxis categoryaxis = categoryplot.getDomainAxis(); //横轴上的 Lable 45度倾斜categoryaxis.setCategoryLabelPositions(CategoryLabelPositions.UP_45);return jfreechart;}一些重要的方法：（增加一块标记）IntervalMarker intervalmarker = new IntervalMarker(4.5D, 7.5D);intervalmarker.setLabel(”Target Range”);intervalmarker.setLabelFont(new Font(”SansSerif”, 2, 11));intervalmarker.setLabelAnchor(RectangleAnchor.LEFT);intervalmarker.setLabelTextAnchor(TextAnchor.CENTER_LEFT);intervalmarker.setPaint(new Color(222, 222, 255, 128));categoryplot.addRangeMarker(intervalmarker, Layer.BACKGROUND);四、折线图折线图的dataset 两种CatagoryDataset接口(具体实现类是DefaultCategoryDataset),XYDataset 接口1、CatagoryDataset接口：A、创建一个数据源（dataset）：private static CategoryDataset createDataset(){String series1 = “First”;String series2 = “Second”;String series3 = “Third”;String type1 = “Type 1″;String type2 = “Type 2″;String type3 = “Type 3″;String type4 = “Type 4″;String type5 = “Type 5″;String type6 = “Type 6″;String type7 = “Type 7″;String type8 = “Type 8″;DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset();defaultcategorydataset.addValue(1.0D, series1, type1);defaultcategorydataset.addValue(4D, series1, type2);defaultcategorydataset.addValue(3D, series1, type3);defaultcategorydataset.addValue(5D, series1, type4);defaultcategorydataset.addValue(5D, series1, type5);defaultcategorydataset.addValue(7D, series1, type6);defaultcategorydataset.addValue(7D, series1, type7);defaultcategorydataset.addValue(8D, series1, type8);defaultcategorydataset.addValue(5D, series2, type1);defaultcategorydataset.addValue(7D, series2, type2);defaultcategorydataset.addValue(6D, series2, type3);defaultcategorydataset.addValue(8D, series2, type4);defaultcategorydataset.addValue(4D, series2, type5);defaultcategorydataset.addValue(4D, series2, type6);defaultcategorydataset.addValue(2D, series2, type7);defaultcategorydataset.addValue(1.0D, series2, type8);defaultcategorydataset.addValue(4D, series3, type1);defaultcategorydataset.addValue(3D, series3, type2);defaultcategorydataset.addValue(2D, series3, type3);defaultcategorydataset.addValue(3D, series3, type4);defaultcategorydataset.addValue(6D, series3, type5);defaultcategorydataset.addValue(3D, series3, type6);defaultcategorydataset.addValue(4D, series3, type7);defaultcategorydataset.addValue(3D, series3, type8);return defaultcategorydataset;}B、由ChartFactory 产生 JFreeChart 对象 (与上面重复的部分就不再注释）private static JFreeChart createChart(CategoryDataset categorydataset){JFreeChart jfreechart = ChartFactory.createLineChart(”Line Chart Demo 1″,“Type”,“Value”,categorydataset,PlotOrientation.VERTICAL,true,true,false);jfreechart.setBackgroundPaint(Color.white);CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot();categoryplot.setBackgroundPaint(Color.lightGray);categoryplot.setRangeGridlinePaint(Color.white);NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis();numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());numberaxis.setAutoRangeIncludesZero(true);//获得renderer 注意这里是下嗍造型到lineandshaperenderer！！LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer)categoryplot.getRenderer();lineandshaperenderer.setShapesVisible(true); //series 点（即数据点）可见lineandshaperenderer.setSeriesStroke(0, new BasicStroke(2.0F, 1, 1, 1.0F, new float[] {10F, 6F}, 0.0F)); //定义series为”First”的（即series1）点之间的连线 ，这里是虚线，默认是直线lineandshaperenderer.setSeriesStroke(1, new BasicStroke(2.0F, 1, 1, 1.0F, new float[] {6F, 6F}, 0.0F)); //定义series为”Second”的（即series2）点之间的连线lineandshaperenderer.setSeriesStroke(2, new BasicStroke(2.0F, 1, 1, 1.0F, new float[] {2.0F, 6F}, 0.0F)); //定义series为”Third”的（即series3）点之间的连线return jfreechart;}一些重要的方法：lineandshaperenderer.setLineVisible(true) //series 点（即数据点）间有连线可见2、XYDataset 接口：A、创建一个数据源（dataset）：private static XYDataset createDataset(){XYSeries xyseries = new XYSeries(”First”); //先产生XYSeries 对象xyseries.add(1.0D, 1.0D);xyseries.add(2D, 4D);xyseries.add(3D, 3D);xyseries.add(4D, 5D);xyseries.add(5D, 5D);xyseries.add(6D, 7D);xyseries.add(7D, 7D);xyseries.add(8D, 8D);XYSeries xyseries1 = new XYSeries(”Second”);xyseries1.add(1.0D, 5D);xyseries1.add(2D, 7D);xyseries1.add(3D, 6D);xyseries1.add(4D, 8D);xyseries1.add(5D, 4D);xyseries1.add(6D, 4D);xyseries1.add(7D, 2D);xyseries1.add(8D, 1.0D);XYSeries xyseries2 = new XYSeries(”Third”);xyseries2.add(3D, 4D);xyseries2.add(4D, 3D);xyseries2.add(5D, 2D);xyseries2.add(6D, 3D);xyseries2.add(7D, 6D);xyseries2.add(8D, 3D);xyseries2.add(9D, 4D);xyseries2.add(10D, 3D);XYSeriesCollection xyseriescollection = new XYSeriesCollection(); //再用XYSeriesCollection添加入XYSeries 对象xyseriescollection.addSeries(xyseries);xyseriescollection.addSeries(xyseries1);xyseriescollection.addSeries(xyseries2);return xyseriescollection;}B、由ChartFactory 产生 JFreeChart 对象private static JFreeChart createChart(XYDataset xydataset){JFreeChart jfreechart = ChartFactory.createXYLineChart(”Line Chart Demo 2″,“X”,“Y”,xydataset,PlotOrientation.VERTICAL,true,true,false);jfreechart.setBackgroundPaint(Color.white);XYPlot xyplot = (XYPlot)jfreechart.getPlot(); //获得 plot：XYPlot！！xyplot.setBackgroundPaint(Color.lightGray); //设定图表数据显示部分背景色xyplot.setAxisOffset(new RectangleInsets(5D, 5D, 5D, 5D)); //设定坐标轴与图表数据显示部分距离xyplot.setDomainGridlinePaint(Color.white); //网格线颜色xyplot.setRangeGridlinePaint(Color.white);//获得 renderer 注意这里是XYLineAndShapeRenderer ！！XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)xyplot.getRenderer();xylineandshaperenderer.setShapesVisible(true); //数据点可见xylineandshaperenderer.setShapesFilled(true); //数据点被填充即不是空心点NumberAxis numberaxis = (NumberAxis)xyplot.getRangeAxis();numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits());return jfreechart;}一些重要的方法：XYLineAndShapeRenderer xylineandshaperenderer = new XYLineAndShapeRenderer();xylineandshaperenderer.setSeriesLinesVisible(0, false); //第一个XYSeries数据点间连线不可见xylineandshaperenderer.setSeriesShapesVisible(1, false); //第二个XYSeries数据点不可见xyplot.setRenderer(xylineandshaperenderer);五、时间序列图时间序列图和折线图很相似，不同的是它在 domain轴的数据是时间而不是数字。 时间序列图的dataset 是XYDataset 接口，具体实现类是TimeSeriesCollection ，和上面类似，有TimeSeries 对象，它被添加入TimeSeriesCollection 。1、创建一个数据源（dataset）：private static XYDataset createDataset(){TimeSeries timeseries = new TimeSeries(”L&G European Index Trust”,Month.class);timeseries.add(new Month(2, 2001), 181.8D);//这里用的是Month.class，同样还有Day.class Year.class 等等timeseries.add(new Month(3, 2001), 167.3D);timeseries.add(new Month(4, 2001), 153.8D);timeseries.add(new Month(5, 2001), 167.6D);timeseries.add(new Month(6, 2001), 158.8D);timeseries.add(new Month(7, 2001), 148.3D);timeseries.add(new Month(8, 2001), 153.9D);timeseries.add(new Month(9, 2001), 142.7D);timeseries.add(new Month(10, 2001), 123.2D);timeseries.add(new Month(11, 2001), 131.8D);timeseries.add(new Month(12, 2001), 139.6D);timeseries.add(new Month(1, 2002), 142.9D);timeseries.add(new Month(2, 2002), 138.7D);timeseries.add(new Month(3, 2002), 137.3D);timeseries.add(new Month(4, 2002), 143.9D);timeseries.add(new Month(5, 2002), 139.8D);timeseries.add(new Month(6, 2002), 137D);timeseries.add(new Month(7, 2002), 132.8D);TimeSeries timeseries1 = new TimeSeries(”L&G UK Index Trust”,Month.class);timeseries1.add(new Month(2, 2001), 129.6D);timeseries1.add(new Month(3, 2001), 123.2D);timeseries1.add(new Month(4, 2001), 117.2D);timeseries1.add(new Month(5, 2001), 124.1D);timeseries1.add(new Month(6, 2001), 122.6D);timeseries1.add(new Month(7, 2001), 119.2D);timeseries1.add(new Month(8, 2001), 116.5D);timeseries1.add(new Month(9, 2001), 112.7D);timeseries1.add(new Month(10, 2001), 101.5D);timeseries1.add(new Month(11, 2001), 106.1D);timeseries1.add(new Month(12, 2001), 110.3D);timeseries1.add(new Month(1, 2002), 111.7D);timeseries1.add(new Month(2, 2002), 111D);timeseries1.add(new Month(3, 2002), 109.6D);timeseries1.add(new Month(4, 2002), 113.2D);timeseries1.add(new Month(5, 2002), 111.6D);timeseries1.add(new Month(6, 2002), 108.8D);timeseries1.add(new Month(7, 2002), 101.6D);TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();timeseriescollection.addSeries(timeseries);timeseriescollection.addSeries(timeseries1);timeseriescollection.setDomainIsPointsInTime(true); //domain轴上的刻度点代表的是时间点而不是时间段return timeseriescollection;}2、由ChartFactory 产生 JFreeChart 对象private static JFreeChart createChart(XYDataset xydataset){JFreeChart jfreechart = ChartFactory.createTimeSeriesChart(”Legal & General Unit Trust Prices”,“Date”,“Price Per Unit”,xydataset,true,true,false);jfreechart.setBackgroundPaint(Color.white);XYPlot xyplot = (XYPlot)jfreechart.getPlot(); //获得 plot : XYPlot!!xyplot.setBackgroundPaint(Color.lightGray);xyplot.setDomainGridlinePaint(Color.white);xyplot.setRangeGridlinePaint(Color.white);xyplot.setAxisOffset(new RectangleInsets(5D, 5D, 5D, 5D));xyplot.setDomainCrosshairVisible(true);xyplot.setRangeCrosshairVisible(true);org.jfree.chart.renderer.xy.XYItemRenderer xyitemrenderer = xyplot.getRenderer();if(xyitemrenderer instanceof XYLineAndShapeRenderer){XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)xyitemrenderer;xylineandshaperenderer.setDefaultShapesVisible(true); //数据点可见xylineandshaperenderer.setDefaultShapesFilled(true); //数据点是实心点}DateAxis dateaxis = (DateAxis)xyplot.getDomainAxis(); //对domain 轴上日期显示格式定义dateaxis.setDateFormatOverride(new SimpleDateFormat(”MMM-yyyy”));return jfreechart;}一些重要的方法：A、增加标记线：xyplot.addRangeMarker(new ValueMarker(550D)); //数值轴Quarter quarter = new Quarter(2, 2002);xyplot.addDomainMarker(new ValueMarker(quarter.getMiddleMillisecond())); //时间轴B、数据点的调整XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer)xyplot.getRenderer();xylineandshaperenderer.setDefaultShapesVisible(true); //数据点可见xylineandshaperenderer.setSeriesFillPaint(0, Color.red); //数据点填充为红色xylineandshaperenderer.setSeriesFillPaint(1, Color.white); //数据点填充为白色xylineandshaperenderer.setUseFillPaint(true); //应用C、平均值曲线这个曲线有什么用呢？很简单的例子，这里有一个以半年每天为单位的数据绘制的曲线，我们想看看以月为单位数据的变化，这时就可以用到它了。TimeSeries timeseries = createEURTimeSeries(); //就是以半年每天为单位的数据TimeSeries timeseries1 = MovingAverage.createMovingAverage(timeseries,“30 day moving average”,30, //30天为一个周期30); //最开始的30天跳过TimeSeriesCollection timeseriescollection = new TimeSeriesCollection();timeseriescollection.addSeries(timeseries);timeseriescollection.addSeries(timeseries1);return timeseriescollection;六、总结一下dataset plot renderer饼图 PieDataset（DefaultPieDataset） PiePlot ——柱状图 CatagoryDataset（DefaultCategoryDataset） CategoryPlot BarRenderer折线图 CatagoryDataset（DefaultCategoryDataset） CategoryPlot LineAndShapeRendererXYDataset（XYSeriesCollection） XYPlot XYLineAndShapeRenderer时间序列图 XYDataset （TimeSeriesCollection） XYPlot XYLineAndShapeRenderer这里只是一些常用的方法，具体还是看API七、Item Lable这里以柱状图为例说明，具体来说就是在每个柱状上显示它的数据，具体有下面内容：A、使 Item Lable 可见B、调整 Item Lable 的颜色、字体等C、调整 Item Lable 的位置D、定制 Item Lable 的内容1、分配一个 Lable Generator 给 rendererBarRenderer barrenderer = (BarRenderer)categoryplot.getRenderer();GategoryLableGenerator generator =new StandardGategoryLableGenerator(“{2}”, new DecimalFormat(”0.00″) //调整显示的数字和字符格式);barrenderer.setLableGenerator(generator);2、使 Item Lable 可见barrenderer.setItemLableVisible(true);3、调整 Item Lable 的颜色、字体等barrenderer.setItemLablePaint(Color.red);barrenderer.setItemLableFont(new Font(”SansSerif”,Font.PLAIN,10));4、调整 Item Lable 的位置这里涉及到一个新的对象 ItemLablePosition , ItemLablePosition的构造函数有两个或四个参数public ItemLabelPosition(ItemLabelAnchor itemLabelAnchor,org.jfree.ui.TextAnchor textAnchor,org.jfree.ui.TextAnchor rotationAnchor,double angle)itemLabelAnchor - Item Lable 的位置 （最重要的！！）textAnchor - Item Lable里包含的正文相对于Item Lable 的位置rotationAnchor - Item Lable里包含的正文旋转的位置angle - 旋转的角度ItemLabelPosition itemlabelposition = new ItemLabelPosition(ItemLabelAnchor.INSIDE12,TextAnchor.CENTER_RIGHT,TextAnchor.CENTER_RIGHT,-1.57D);barrenderer.setPositiveItemLabelPosition(itemlabelposition);这样就可以每个柱状上显示它的数据了，当然可以定制 Item Lable 的内容，比如 Item Lable text 超过100的才显示，这样就需要定制自己的类，它要实现GategoryLableGenerator 接口，实现generateItemLable()方法
