jfreechart入门经典.docx

1、jfreechart入门经典一、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

2、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()Def

3、aultPieDataset 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

4、.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)jfreec

5、hart.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

6、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;DefaultCate

7、goryDataset defaultcategorydataset = new DefaultCategoryDataset();defaultcategorydataset.addValue(1.0D, series1, category1);defaultcategorydataset.addValue(4D, series1, category2);defaultcategorydataset.addValue(3D, series1, category3);defaultcategorydataset.addValue(5D, series1, category4);defaultc

8、ategorydataset.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.addVa

9、lue(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, cat

10、egory5);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Labl

11、e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

12、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.create

13、IntegerTickUnits();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 gradi

14、entpaint1 = 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, gradientpaint

15、1); /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 intervalma

16、rker = 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);c

17、ategoryplot.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”

18、;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,

19、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.a

20、ddValue(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);defaultcateg

21、orydataset.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

22、);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, se

23、ries3, 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,

24、false);jfreechart.setBackgroundPaint(Color.white);CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot();categoryplot.setBackgroundPaint(Color.lightGray);categoryplot.setRangeGridlinePaint(Color.white);NumberAxis numberaxis = (NumberAxis)categoryplot.getRangeAxis();numberaxis.setStandardTick

25、Units(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lineandshaperender

26、er.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(

27、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

28、”); /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, 6

29、D);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.

30、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

31、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 Re