删除 JFreeChart 中的 x 轴日期值

Question

我是JFreeChart的新手，不知道如何解决这个问题；我也不知道是否有可能做我假装的事。问题是这样的，我试图在 Java Swing 应用程序中显示图表，我传递了要显示的日期和值。日期由用户选择，可能不是连续的；我的意思是，如果用户选择星期四到星期一，则避免星期六和星期日，并在星期四、星期五和星期一传递给图表。问题是图表从星期四到星期一（包括星期六和星期日），并在 X 轴上显示它们，而实际上不应该这样。基于此 example，我的 class 如下：

ArrayList<StringBuffer> dates={20-02-2015,23-02-2015,24-02-2015,25-02-2015,26-02-2015};
args="tittle";
frame=(the frame where I do the call,although it's not needed in myChartPanelDemo2,just added for setting errorDialogs purpose);
ArrayList<StringBuffer> amount = {"serie1","serie2"};
myChartPanelDemo2.init(amount,args,dates,frame);

public class myChartPanelDemo2 {

    static int datasetIndex;
    private static ChartPanel chartPanel;

    public static JPanel init(ArrayList<StringBuffer> amount, String args, 
            ArrayList<StringBuffer> dates, JFrame frame) {
//*****just getting the values***********//
        datasetIndex = 0;
        int cantity = amount.size();
        int cantity2 = fechas.size();
        float[][] resultArray = new float[cantity][cantity];
        float[] result = new float[cantity2];
        for (int x = 0; x < cantity; x++) {
            for (int y = 0; y < cantity2; y++) {
                result[y] = callingDataBase.main(amount.get(x), args, dates.get(y));
            }
            for (int v = 0; v < result.length; v++) {
                resultArray[x][v] = result[v];
            }
//resultArray will be the array from where chartPanel will take the values
        }
        XYDataset roiData = createDataset(args, dates, resultArray, amount);
        JFreeChart chart = ChartFactory.createTimeSeriesChart(args, "Days",
                "Values", roiData, true, true, false);
        XYPlot plot = chart.getXYPlot();
        XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer();
        renderer.setBaseShapesVisible(true);
        chartPanel = new ChartPanel(chart);
        JPanel f = new JPanel(new BorderLayout());
        f.add(chartPanel, BorderLayout.CENTER);
        chartPanel.setHorizontalAxisTrace(true);
        chartPanel.setVerticalAxisTrace(true);
        JPanel panel = new JPanel(new BorderLayout());
        panel.add(createTrace(), BorderLayout.SOUTH);
        f.add(panel, BorderLayout.SOUTH);
        f.setVisible(true);
        chartPanel.setSize(new Dimension(frame.getWidth(), frame.getHeight()));
        chartPanel.setMaximumSize(new Dimension(frame.getWidth(), frame.getHeight()));
        chartPanel.setPreferredSize(new Dimension(frame.getWidth(), frame.getHeight()));
        return f;
    }

    /** @see  */
    private static JComboBox<String> createTrace() {
        final JComboBox<String> trace = new JComboBox<String>();
        final String[] traceCmds = {"Enable Trace", "Disable Trace"};
        trace.setModel(new DefaultComboBoxModel<String>(traceCmds));
        trace.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                if (traceCmds[0].equals(trace.getSelectedItem())) {
                    chartPanel.setHorizontalAxisTrace(true);
                    chartPanel.setVerticalAxisTrace(true);
                    chartPanel.repaint();
                } else {
                    chartPanel.setHorizontalAxisTrace(false);
                    chartPanel.setVerticalAxisTrace(false);
                    chartPanel.repaint();
                }
            }
        });
        return trace;
    }

    private static XYDataset createDataset(String name,
            ArrayList<StringBuffer> dates, float[][] resultArray,
            ArrayList<StringBuffer> amount) {
        TimeSeriesCollection tsc = new TimeSeriesCollection();
        for (int x = 0; x < GraficoEmpresas.size(); x++) {
            tsc.addSeries(createSeries(GraficoEmpresas.get(x).toString(), fechas,
                    resultArray, x));
        }
        return tsc;


    private static TimeSeries createSeries(String name,
            ArrayList<StringBuffer> dates, float[][] resultArray, int x) {
        final TimeSeries series = new TimeSeries(name);
        int cantity2 = dates.size();
        RegularTimePeriod t = new Day();
        for (int y = 0; y < cantity2; y++) {
            Date fecha;
            SimpleDateFormat formatoDelTexto = new SimpleDateFormat("dd-MM-yyyy");
            day = new Date();
            try {
                day = formatoDelTexto.parse(fechas.get(y).toString());
            } catch (ParseException e) {
                e.printStackTrace();
            }
            RegularTimePeriod p = new Day(day);
            series.addOrUpdate(p, resultArray[x][y]);
        }
        return series;
    }
}

我无法上传图片，信誉度不够，但结果是一个 x 轴值的图表：{20-02-2015 -- 21-02-2015 -- 22-02-2015 - -23-02-2015 -- 24-02-2015 -- 25-02-2015 -- 26-02-2015} 除了 21 和 22 之外的每个点都有数据集值，但轴标签中添加了 21 和 22。

我同时使用 JFreechart 和 JCommon 1.0.16。我想这是一个自动完成问题，但这只是一个猜测，我无法检查它是否属实。有谁知道如何避免这种情况或者这是不可能的？谢谢！！

Answer 1

没有完整的示例很难确定，但您可以将 SegmentedTimeline 应用于您选择的 ChartFactory 创建的 DataAxis。使用静态工厂方法newMondayThroughFridayTimeline()创建周一至周五SegmentedTimeline，如图here. You can get a reference to the DataAxis from the chart's plot; alternatively, skip the ChartFactory and create the chart de novo, as shown here.

Answer 2

非常感谢！！！只需添加这两行即可解决问题：来源是：this example ValueAxis domainAxis = plot.getDomainAxis(); ((DateAxis) domainAxis).setTimeline( SegmentedTimeline.newMondayThroughFridayTimeline() );

整个 class 将是：

public class myChartPanelDemo2 {

static int datasetIndex;
private static ChartPanel chartPanel;

public static JPanel init(ArrayList<StringBuffer> amount, String args, 
        ArrayList<StringBuffer> dates, JFrame frame) {

//*****只是获取值***********//

     datasetIndex = 0;
    int cantity = amount.size();
    int cantity2 = fechas.size();
    float[][] resultArray = new float[cantity][cantity];
    float[] result = new float[cantity2];
    for (int x = 0; x < cantity; x++) {
        for (int y = 0; y < cantity2; y++) {
            result[y] = callingDataBase.main(amount.get(x), args, dates.get(y));
        }
        for (int v = 0; v < result.length; v++) {
            resultArray[x][v] = result[v];
        }

//resultArray 将是 chartPanel 将从中获取值的数组

 }
    XYDataset roiData = createDataset(args, dates, resultArray, amount);
    JFreeChart chart = ChartFactory.createTimeSeriesChart(args, "Days",
            "Values", roiData, true, true, false);
    XYPlot plot = chart.getXYPlot();
    XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer();
    renderer.setBaseShapesVisible(true);
ValueAxis domainAxis = plot.getDomainAxis();
 ((DateAxis) domainAxis).setTimeline( SegmentedTimeline.newMondayThroughFridayTimeline() );
    chartPanel = new ChartPanel(chart);
    JPanel f = new JPanel(new BorderLayout());
    f.add(chartPanel, BorderLayout.CENTER);
    chartPanel.setHorizontalAxisTrace(true);
    chartPanel.setVerticalAxisTrace(true);
    JPanel panel = new JPanel(new BorderLayout());
    panel.add(createTrace(), BorderLayout.SOUTH);
    f.add(panel, BorderLayout.SOUTH);
    f.setVisible(true);
    chartPanel.setSize(new Dimension(frame.getWidth(), frame.getHeight()));
    chartPanel.setMaximumSize(new Dimension(frame.getWidth(), frame.getHeight()));
    chartPanel.setPreferredSize(new Dimension(frame.getWidth(), frame.getHeight()));
    return f;
}

/** @see  */
private static JComboBox<String> createTrace() {
    final JComboBox<String> trace = new JComboBox<String>();
    final String[] traceCmds = {"Enable Trace", "Disable Trace"};
    trace.setModel(new DefaultComboBoxModel<String>(traceCmds));
    trace.addActionListener(new ActionListener() {
        @Override
        public void actionPerformed(ActionEvent e) {
            if (traceCmds[0].equals(trace.getSelectedItem())) {
                chartPanel.setHorizontalAxisTrace(true);
                chartPanel.setVerticalAxisTrace(true);
                chartPanel.repaint();
            } else {
                chartPanel.setHorizontalAxisTrace(false);
                chartPanel.setVerticalAxisTrace(false);
                chartPanel.repaint();
            }
        }
    });
    return trace;
}

private static XYDataset createDataset(String name,
        ArrayList<StringBuffer> dates, float[][] resultArray,
        ArrayList<StringBuffer> amount) {
    TimeSeriesCollection tsc = new TimeSeriesCollection();
    for (int x = 0; x < GraficoEmpresas.size(); x++) {
        tsc.addSeries(createSeries(GraficoEmpresas.get(x).toString(), fechas,
                resultArray, x));
    }
    return tsc;


private static TimeSeries createSeries(String name,
        ArrayList<StringBuffer> dates, float[][] resultArray, int x) {
    final TimeSeries series = new TimeSeries(name);
    int cantity2 = dates.size();
    RegularTimePeriod t = new Day();
    for (int y = 0; y < cantity2; y++) {
        Date fecha;
        SimpleDateFormat formatoDelTexto = new SimpleDateFormat("dd-MM-yyyy");
        day = new Date();
        try {
            day = formatoDelTexto.parse(fechas.get(y).toString());
        } catch (ParseException e) {
            e.printStackTrace();
        }
        RegularTimePeriod p = new Day(day);
        series.addOrUpdate(p, resultArray[x][y]);
    }
    return series;
}

}

删除 JFreeChart 中的 x 轴日期值

Remove x-axis date values in JFreeChart

java

swing

jfreechart