import org.jCharts.properties.DataAxisProperties; //导入依赖的package包/类
public void lineChart(
    int width,
    int height,
    String xAxisTitle,
    String yAxisTitle,
    String[] xAxisLabels,
    String title,
    String[] legendLabels,
    double[][] data,
    long yAxisMinValue,
    long yAxisIncrement,
    String filename) throws Exception {

    LegendProperties legendProperties = new LegendProperties();
    ChartProperties chartProperties = new ChartProperties();
    AxisProperties axisProperties = new AxisProperties(false);

    ChartFont axisScaleFont = new ChartFont(new Font("Georgia Negreta cursiva", Font.PLAIN, 10), Color.black);
    axisProperties.setXAxisLabelsAreVertical(true);
    axisProperties.getXAxisProperties().setScaleChartFont(axisScaleFont);
    axisProperties.getYAxisProperties().setScaleChartFont(axisScaleFont);

    ChartFont axisTitleFont = new ChartFont(new Font("Georgia Negreta cursiva", Font.PLAIN, 12), Color.black);
    axisProperties.getXAxisProperties().setAxisTitleChartFont(axisTitleFont);
    axisProperties.getYAxisProperties().setAxisTitleChartFont(axisTitleFont);

    // If yAxisIncrement <= 0, then org.jCharts.properties.DataAxisProperties.setUserDefinedScale will throw a
    // org.jCharts.properties.PropertyException ("The Axis Increment can not be a negative value or zero.").
    if (yAxisMinValue != -1 && yAxisIncrement > 0) {
        DataAxisProperties dataAxisProperties = (DataAxisProperties) axisProperties.getYAxisProperties();
        dataAxisProperties.setUserDefinedScale(yAxisMinValue, yAxisIncrement);
    }

    ChartFont titleFont = new ChartFont(new Font("Georgia Negreta cursiva", Font.PLAIN, 14), Color.black);
    chartProperties.setTitleFont(titleFont);

    this.showGrid(axisProperties);

    ValueLabelRenderer valueLabelRenderer = new ValueLabelRenderer(false, false, true, -1);
    valueLabelRenderer.setValueLabelPosition(ValueLabelPosition.ON_TOP);
    valueLabelRenderer.useVerticalLabels(false);

    Stroke[] strokes = { LineChartProperties.DEFAULT_LINE_STROKE };
    Shape[] shapes = { PointChartProperties.SHAPE_DIAMOND };
    LineChartProperties lineChartProperties = new LineChartProperties(strokes, shapes);

    IAxisDataSeries dataSeries = new DataSeries(xAxisLabels, xAxisTitle, yAxisTitle, title);

    Paint[] color = new Paint[] { Color.BLUE };
    dataSeries.addIAxisPlotDataSet(
        new AxisChartDataSet(data, legendLabels, color, ChartType.LINE, lineChartProperties));

    AxisChart axisChart = new AxisChart(dataSeries, chartProperties, axisProperties, legendProperties, width, height);
    JPEGEncoder.encode(axisChart, 1.0f, new FileOutputStream(filename));

}
 

import org.jCharts.properties.DataAxisProperties; //导入依赖的package包/类
private void drawSample(String _title, String[] _xAxisLabels, String _xAxisTitle,
        String _yAxisTitle, double[][] _data, int _width, int _height, Graphics g) {
    try {
        if (_width == 0) {
            _width = 450;
        }
        if (_height == 0) {
            _height = 250;
        }
        this.setPreferredSize(new Dimension(_width,_height));
        DataSeries dataSeries = new DataSeries( _xAxisLabels, _xAxisTitle, _yAxisTitle, _title );
        String[] legendLabels= yAxisLabel;
        Paint[] paints = this.createPaint(_data.length);
        Shape[] shapes = createShapes(_data.length);
        Stroke[] lstrokes = createStrokes(_data.length);
        LineChartProperties lineChartProperties= new LineChartProperties(lstrokes,shapes);
        AxisChartDataSet axisChartDataSet= new AxisChartDataSet( _data,
                legendLabels,
                paints,
                ChartType.LINE,
                lineChartProperties );
        dataSeries.addIAxisPlotDataSet( axisChartDataSet );

        ChartProperties chartProperties = new ChartProperties();
        AxisProperties axisProperties = new AxisProperties();
        // show the grid lines, to turn it off, set it to zero
        axisProperties.getYAxisProperties().setShowGridLines(1);
        axisProperties.setXAxisLabelsAreVertical(true);
        // set the Y Axis to round
        DataAxisProperties daxp = (DataAxisProperties)axisProperties.getYAxisProperties();
        daxp.setRoundToNearest(1);
        LegendProperties legendProperties = new LegendProperties();
        AxisChart axisChart = new AxisChart(
                dataSeries, chartProperties, axisProperties,
                legendProperties, _width, _height );
        axisChart.setGraphics2D((Graphics2D) g);
        axisChart.render();
    } catch (Exception e) {
        log.error(e.getMessage());
    }
}