Question

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，但是左边的标签变成了重叠......但是，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此显示 http://i58.tinypic.com/r1fr01.jpg 只需传递'PlotOrientation.HORIZONTAL' 在这部分中，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：即使我使用相同的数据并通过，我也得不到我需要的东西 'PlotOrientation.HORIZONTAL' 如此显示 http://i57.tinypic.com/11hq9tk.jpg 我评论了解决问题的方法

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'不是为它而设计的，除了我有重叠的问题。此外，为了满足我的需要，它需要覆盖次数

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：

enter image description here

......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，然后应该反转x轴，第三，你必须提供y轴应该在顶部的提示。结果如下：

enter image description here

...以及生成它的代码（***标记了添加的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);
    }
}

如何使用jfreechart从上到下绘制折线图？

1 个答案: