JFreeChart 时间序列图

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小牛编辑

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2023-03-14

什么是JFreeChart 时间序列图

时间序列图表表示以相等的时间间隔变化的数字数据序列。

下图显示了 JFreeChart 库中包含的时间序列图表的一些演示版本：

JFreeChart 时间序列图的示例

让我们考虑以下时间序列图表的示例数据。

日期	列1	列2
2017-01-01	50	40
2017-01-02	40	35
2017-01-03	45	26
2017-01-04	30	45
2017-01-05	50	40
2017-01-06	45	35
2017-01-07	60	45
2017-01-08	45	48
2017-01-09	55	31
2017-01-10	48	32
2017-01-11	60	21
2017-01-12	45	35
2017-01-13	65	10
2017-01-14	45	25
2017-01-15	55	15

以下代码根据上述示例数据创建气泡图：

package cn.xnip;

import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartPanel;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.XYPlot;
import org.jfree.data.time.Day;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;

import javax.swing.*;

public class TimeSeriesChartExample extends JFrame {  
  
  private static final long serialVersionUID = 1L;  
  
  public TimeSeriesChartExample(String title) {  
    super(title);  
    // Create dataset  
    XYDataset dataset = createDataset();  
    // Create chart  
    JFreeChart chart = ChartFactory.createTimeSeriesChart(  
        "Time Series Chart Example", // Chart  
        "Date", // X-Axis Label  
        "Number", // Y-Axis Label  
        dataset);  
  
    //Changes background color  
    XYPlot plot = (XYPlot)chart.getPlot();  
    plot.setBackgroundPaint(new Color(255,228,196));  
      
    ChartPanel panel = new ChartPanel(chart);  
    setContentPane(panel);  
  }  
  
  private XYDataset createDataset() {  
    TimeSeriesCollection dataset = new TimeSeriesCollection();  
  
    TimeSeries series1 = new TimeSeries("Series1");  
    series1.add(new Day(1, 1, 2017), 50);  
    series1.add(new Day(2, 1, 2017), 40);  
    series1.add(new Day(3, 1, 2017), 45);  
    series1.add(new Day(4, 1, 2017), 30);  
    series1.add(new Day(5, 1, 2017), 50);  
    series1.add(new Day(6, 1, 2017), 45);  
    series1.add(new Day(7, 1, 2017), 60);  
    series1.add(new Day(8, 1, 2017), 45);  
    series1.add(new Day(9, 1, 2017), 55);  
    series1.add(new Day(10, 1, 2017), 48);  
    series1.add(new Day(11, 1, 2017), 60);  
    series1.add(new Day(12, 1, 2017), 45);  
    series1.add(new Day(13, 1, 2017), 65);  
    series1.add(new Day(14, 1, 2017), 45);  
    series1.add(new Day(15, 1, 2017), 55);  
    dataset.addSeries(series1);  
  
    TimeSeries series2 = new TimeSeries("Series2");  
    series2.add(new Day(1, 1, 2017), 40);  
    series2.add(new Day(2, 1, 2017), 35);  
    series2.add(new Day(3, 1, 2017), 26);  
    series2.add(new Day(4, 1, 2017), 45);  
    series2.add(new Day(5, 1, 2017), 40);  
    series2.add(new Day(6, 1, 2017), 35);  
    series2.add(new Day(7, 1, 2017), 45);  
    series2.add(new Day(8, 1, 2017), 48);  
    series2.add(new Day(9, 1, 2017), 31);  
    series2.add(new Day(10, 1, 2017), 32);  
    series2.add(new Day(11, 1, 2017), 21);  
    series2.add(new Day(12, 1, 2017), 35);  
    series2.add(new Day(13, 1, 2017), 10);  
    series2.add(new Day(14, 1, 2017), 25);  
    series2.add(new Day(15, 1, 2017), 15);  
    dataset.addSeries(series2);  
      
  
    return dataset;  
  }  
  
  public static void main(String[] args) {  
    SwingUtilities.invokeLater(() -> {  
      TimeSeriesChartExample example = new TimeSeriesChartExample("小牛知识库网：Time Series Chart");  
      example.setSize(800, 400);  
      example.setLocationRelativeTo(null);  
      example.setVisible(true);  
      example.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);  
    });  
  }  
}

输出结果为：