Java 如何使用jfreechart自上而下绘制折线图？

我正在使用jfreechart绘制折线图，我需要从上到下绘制这条线 .... 意思是：0,0坐标将位于左上角。 当我使用“CategoryPlot”时，只需更改“PlotOrientation”，就可以做到这一点，但左侧的标签变得重叠。无论如何，我更喜欢“xyplot”

更改“SetInversed”或“setDomainAxisLocation”没有帮助

任何帮助都将不胜感激

更新： 为了更清晰，我重新发布了我的代码（图表绘制部分）

在第一个代码中： 我得到了所需的输出 如图所示 只需传递“PlotOrientation.HORIZONTAL” 在这一部分中，我使用“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);
    }
}

在第二段代码中： 我没有得到我需要的，即使我使用相同的数据和通行证 '打印方向。水平' 如图所示 我评论了我解决问题的方法

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'不是为它设计的，除了我有重叠的问题。此外，为了满足我的需要，它需要多次重写。首先，按如下方式创建数据集，然后不要更改它……数据是相同的，无论您希望如何显示它：

    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，一个合理标准的JFreeChart创建如下所示：

…以下是代码：

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);
    }
}

几乎不需要改变就能得到你想要的情节。首先，应更改打印方向，第二个x轴应反转，第三个必须提供y轴应位于顶部的提示。结果如下：

。。。以及生成代码（添加的5行由***标记）：

---

您是否尝试过

PlotOrientation.HORIZONTAL

？是的，但没有任何帮助。。假设我添加这些值-忘记随机数-（xyseries.add（0，0）；xyseries.add（1，2）；xyseries.add（2，5）；xyseries.add（3，10）；xyseries.add（4，7）；xyseries.add（5，8）；）默认方向的输出在第#1行我有2，第#2行我有5，依此类推。。我希望绘图从上到下开始我正在寻找这样的输出，正如我所说的，通过使用“CategoryPlot”和PlotOrientation.HORIZONTAL..

XYSeries（“像素”，true）

？我不确定我必须在哪里写你的建议，也不明白它。。这是一种方法吗？谢谢你，你让我开心了：）我想知道我犯了什么错。。。我将“PlotOrientation.HORIZONTAL”传递给“createXYLineChart”方法，设置“setInversed（true）”并生成plot.setRangeAxisLocation（AxisLocation.TOP\u或左）。。。顺便说一句，我是jfreechart的忠实粉丝，感谢您提供如此棒/优雅的库

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);
    }
}