如何使用jfreechart从上到下绘制折线图？

我正在使用jfreechart绘制折线图，​​我需要从上到下绘制线条……含义：0,0坐标将位于左上角。 当我通过更改’PlotOrientation’使用’CategoryPlot’时，我能够做到这一点，但左边的标签变成了重叠……不知何故，我更喜欢’xyplot’

更改’setInverted’或’setDomainAxisLocation’没有帮助

任何帮助将不胜感激

更新：我正在重新发布我的代码以获得更好的清晰度（图表绘图部分）

在第一个代码中：我得到了所需的输出，如图所示http://sofzh.miximages.com/java/r1fr01.jpg只是通过在这部分传递’PlotOrientation.HORIZONTAL’，我正在使用’CategoryPlot’

import java.awt.*; import javax.swing.JPanel; import org.jfree.chart.*; import org.jfree.chart.plot.CategoryPlot; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.renderer.category.LineAndShapeRenderer; import org.jfree.chart.title.TextTitle; import org.jfree.data.category.CategoryDataset; import org.jfree.data.category.DefaultCategoryDataset; import org.jfree.ui.*; public class PCategory extends ApplicationFrame { public PCategory(String s) { super(s); JPanel jpanel = createDemoPanel(); jpanel.setPreferredSize(new Dimension(300, 200)); setContentPane(jpanel); } private static CategoryDataset createDataset() { DefaultCategoryDataset defaultcategorydataset = new DefaultCategoryDataset(); defaultcategorydataset.addValue(0,"Pixels", Integer.toString(0)); defaultcategorydataset.addValue(2,"Pixels", Integer.toString(1)); defaultcategorydataset.addValue(5,"Pixels", Integer.toString(2)); defaultcategorydataset.addValue(10,"Pixels", Integer.toString(3)); defaultcategorydataset.addValue(7,"Pixels", Integer.toString(4)); defaultcategorydataset.addValue(8,"Pixels", Integer.toString(5)); return defaultcategorydataset; } private static JFreeChart createChart(CategoryDataset categorydataset) { JFreeChart jfreechart = ChartFactory.createLineChart(null, null, null, categorydataset, PlotOrientation.HORIZONTAL, false, true, false); jfreechart.addSubtitle(new TextTitle("Title")); CategoryPlot categoryplot = (CategoryPlot)jfreechart.getPlot(); categoryplot.setRangePannable(true); categoryplot.setRangeGridlinesVisible(false); ChartUtilities.applyCurrentTheme(jfreechart); LineAndShapeRenderer lineandshaperenderer = (LineAndShapeRenderer)categoryplot.getRenderer(); lineandshaperenderer.setBaseShapesVisible(true); lineandshaperenderer.setDrawOutlines(true); lineandshaperenderer.setUseFillPaint(true); lineandshaperenderer.setBaseFillPaint(Color.white); lineandshaperenderer.setSeriesStroke(0, new BasicStroke(3F)); lineandshaperenderer.setSeriesOutlineStroke(0, new BasicStroke(2.0F)); lineandshaperenderer.setSeriesShape(0, new java.awt.geom.Ellipse2D.Double(-5D, -5D, 10D, 10D)); return jfreechart; } public static JPanel createDemoPanel() { JFreeChart jfreechart = createChart(createDataset()); ChartPanel chartpanel = new ChartPanel(jfreechart); chartpanel.setMouseWheelEnabled(true); return chartpanel; } public static void main(String args[]) { PCategory PCategory = new PCategory("PCategory.java"); PCategory.pack(); RefineryUtilities.centerFrameOnScreen(PCategory); PCategory.setVisible(true); } } 

在第二个代码中：我没有得到我需要的东西，即使我使用相同的数据并通过’PlotOrientation.HORIZONTAL’显示在这里http://sofzh.miximages.com/java/11hq9tk.jpg我评论了我的解决方法问题

 import java.awt.Dimension; import javax.swing.JPanel; import org.jfree.chart.*; import org.jfree.chart.plot.PlotOrientation; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; import org.jfree.data.xy.*; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RefineryUtilities; public class PXYPlot extends ApplicationFrame { public PXYPlot(String s) { super(s); JPanel jpanel = createPanel(); jpanel.setPreferredSize(new Dimension(300, 200)); setContentPane(jpanel); } private static XYDataset createDataset() { XYSeries xyseries = new XYSeries("Pixels", true); xyseries.add(0, 0); xyseries.add(2, 1); xyseries.add(5, 2); xyseries.add(10, 3); xyseries.add(7, 4); xyseries.add(8, 5); XYSeriesCollection xyseriescollection = new XYSeriesCollection(); xyseriescollection.addSeries(xyseries); return xyseriescollection; } private static JFreeChart createChart(XYDataset xydataset) { JFreeChart Mychart = ChartFactory.createXYLineChart(null, null, null, xydataset, PlotOrientation.HORIZONTAL, true, true, false); XYPlot xyplot = (XYPlot) Mychart.getPlot(); xyplot.setDomainPannable(true); xyplot.setRangePannable(true); XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer) xyplot.getRenderer(); xylineandshaperenderer.setBaseShapesVisible(true); xylineandshaperenderer.setBaseShapesFilled(true); /* ----------- this part is my attempt to solve the problem ----- NumberAxis numberaxis = (NumberAxis)xyplot.getRangeAxis(); numberaxis.setInverted(true); xyplot.setDomainAxisLocation(AxisLocation.TOP_OR_LEFT); //------------I like XYplot because of the part ----------------- NumberAxis xAxis = new NumberAxis(); xAxis.setTickUnit(new NumberTickUnit(1)); XYPlot plot = (XYPlot) Mychart.getPlot(); plot.setDomainAxis(xAxis); //----------------------------- numberaxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); */ return Mychart; } public static JPanel createPanel() { JFreeChart jfreechart = createChart(createDataset()); ChartPanel chartpanel = new ChartPanel(jfreechart); chartpanel.setMouseWheelEnabled(true); return chartpanel; } public static void main(String args[]) { PXYPlot PXYPlot = new PXYPlot("PXYPlot.java"); PXYPlot.pack(); RefineryUtilities.centerFrameOnScreen(PXYPlot); PXYPlot.setVisible(true); } } 

我需要’XYPlot’，因为我有大量的数据，我认为’CategoryPlot’并不是为它而设计的，除此之外我还有重叠的问题。 此外，它需要多次覆盖以满足我的需求

Answer 1

首先，按如下方式创建数据集，然后不要更改它……无论您想如何呈现数据，数据都是相同的：

  private XYDataset createDataset() { XYSeries s1 = new XYSeries("S1"); s1.add(0, 0); s1.add(1, 2); s1.add(2, 5); s1.add(3, 10); s1.add(4, 7); s1.add(5, 8); XYSeriesCollection dataset = new XYSeriesCollection(); dataset.addSeries(s1); return dataset; } 

现在，合理标准的JFreeChart创建将如下所示：

……这是代码：

 import java.awt.Color; import java.awt.Dimension; import java.awt.geom.Ellipse2D; import javax.swing.JFrame; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; public class StackOverflow25993430 extends JFrame { public StackOverflow25993430(String title) { super(title); JFreeChart chart = createChart(createDataset()); ChartPanel panel = new ChartPanel(chart); panel.setPreferredSize(new Dimension(500, 300)); setContentPane(panel); } private XYDataset createDataset() { XYSeries s1 = new XYSeries("S1"); s1.add(0, 0); s1.add(1, 2); s1.add(2, 5); s1.add(3, 10); s1.add(4, 7); s1.add(5, 8); XYSeriesCollection dataset = new XYSeriesCollection(); dataset.addSeries(s1); return dataset; } private JFreeChart createChart(XYDataset dataset) { JFreeChart chart = ChartFactory.createXYLineChart( "StackOverflow25993430", "X", "Y", dataset); chart.removeLegend(); XYPlot plot = (XYPlot) chart.getPlot(); XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer(); renderer.setSeriesShapesVisible(0, true); renderer.setSeriesShape(0, new Ellipse2D.Double(-4.0, -4.0, 8.0, 8.0)); renderer.setSeriesFillPaint(0, Color.WHITE); renderer.setUseFillPaint(true); NumberAxis xAxis = (NumberAxis) plot.getDomainAxis(); xAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); return chart; } public static void main(String[] args) { JFrame app = new StackOverflow25993430("JFreeChart"); app.pack(); app.setVisible(true); } } 

很少需要改变以获得你想要的情节。 首先，应该改变绘图方向，其次应该反转x轴，第三，你必须提供y轴应该在顶部的提示。 结果如下：

…以及生成它的代码（用***标记添加的5行）：

 import java.awt.Color; import java.awt.Dimension; import java.awt.geom.Ellipse2D; import javax.swing.JFrame; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.axis.AxisLocation; // *** import org.jfree.chart.axis.NumberAxis; import org.jfree.chart.plot.PlotOrientation; // *** import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; import org.jfree.data.xy.XYDataset; import org.jfree.data.xy.XYSeries; import org.jfree.data.xy.XYSeriesCollection; public class StackOverflow25993430b extends JFrame { public StackOverflow25993430b(String title) { super(title); JFreeChart chart = createChart(createDataset()); ChartPanel panel = new ChartPanel(chart); panel.setPreferredSize(new Dimension(500, 300)); setContentPane(panel); } private XYDataset createDataset() { XYSeries s1 = new XYSeries("S1"); s1.add(0, 0); s1.add(1, 2); s1.add(2, 5); s1.add(3, 10); s1.add(4, 7); s1.add(5, 8); XYSeriesCollection dataset = new XYSeriesCollection(); dataset.addSeries(s1); return dataset; } private JFreeChart createChart(XYDataset dataset) { JFreeChart chart = ChartFactory.createXYLineChart( "StackOverflow25993430b", "X", "Y", dataset); chart.removeLegend(); XYPlot plot = (XYPlot) chart.getPlot(); plot.setOrientation(PlotOrientation.HORIZONTAL); // *** plot.setRangeAxisLocation(AxisLocation.TOP_OR_LEFT); // *** XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer(); renderer.setSeriesShapesVisible(0, true); renderer.setSeriesShape(0, new Ellipse2D.Double(-4.0, -4.0, 8.0, 8.0)); renderer.setSeriesFillPaint(0, Color.WHITE); renderer.setUseFillPaint(true); NumberAxis xAxis = (NumberAxis) plot.getDomainAxis(); xAxis.setStandardTickUnits(NumberAxis.createIntegerTickUnits()); xAxis.setInverted(true); // *** return chart; } public static void main(String[] args) { JFrame app = new StackOverflow25993430b("JFreeChart"); app.pack(); app.setVisible(true); } }