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  • jfreechart教程

    2013-11-10 16:59:01
    这是jfreechart基础教程,贡献给刚入门的友友们。
  • JFreeChart教程

    千次阅读 2019-07-05 14:13:56
    JFreeChart教程 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....

    转载自:http://www.blogjava.net/lyjjq/articles/61325.html

    JFreeChart教程

    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 DefaultPieDataset
    1、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, // dataset
    true, // 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, // dataset
    PlotOrientation.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 LineAndShapeRenderer
    XYDataset(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 renderer
    BarRenderer 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。

     

    展开全文
  • JFreeChart教程

    2011-06-13 15:18:00
    JFreeChart教程 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 ...

    JFreeChart教程

    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 DefaultPieDataset
    1、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, // dataset
    true, // 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, // dataset
    PlotOrientation.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 LineAndShapeRenderer
    XYDataset(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 renderer
    BarRenderer 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

    展开全文

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