JFreeChart应用

        <dependency>
            <groupId>org.jfree</groupId>
            <artifactId>jfreechart</artifactId>
            <version>1.5.0</version>
        </dependency>

1. Creates a line chart (创建折线图)

  JFreeChat chart = ChartFactory.createXYLineChart("", "time/min", "", null, PlotOrientation.VERTICAL, false, true, false);

2. Constructs a panel that displays the specified chart (构造用于显示图表的面板)

  ChartPanel panel = new ChartPanel(chart);

3. Sets the dataset for the chart (设置图表的数据集)

  XYSeriesCollection seriesCollection = new XYSeriesCollection(); // Constructs an empty dataset.

  for (int i=0; i<16; i++) {
            XYSeries series = new XYSeries(String.valueOf(i)); // Creates a new empty series.
                for (int x=0; x<100; x++) {
                    series.add(x, y); // Adds a data item to the series
                }
            seriesCollection.addSeries(series); // Adds a series to the collection
        }

  XYPlot plot = (XYPlot) chart.getPlot(); // the plot of the chart

  plot.setDataset(seriesCollection); // Sets the primary dataset for the plot