jreechart - (5)TimeSeriesChart时序图

生成时序图：

       JFreeChart chart = ChartFactory.createTimeSeriesChart( 
              String title,    // 图标题 
                 String timeAxisLabel,   //x 轴标题 
                 String valueAxisLabel,  //y 轴标题 
                 XYDataset dataset,       // 数据源 
                 boolean legend,          // 是否显示图例 
                 boolean tooltips,        // 是否显示 tooltip 
                 boolean urls);           // 是否指定 url 

 

时序图的 Plot 对象是 XYPlot 类型。 XYPlot 对象的 x 轴是 DateAxis 对象， y 轴是 NumberAxis 对象，绘制单元是 XYLineAndShapeRenderer 对象，数据源是 XYDataset 对象。

//Plot 对象的获取操作： 
XYPlot plot = (XYPlot) chart.getPlot(); 
//X 轴对象的获取操作： 
DateAxis xAxis = (DateAxis) plot.getDomainAxis(); 
//Y 轴对象的获取操作： 
NumberAxis yAxis =(NumberAxis) plot.getRangeAxis(); 
//Renderer 对象的获取操作： 
XYItemRenderer renderer= plot.getRenderer(); 

 

 

时序图可以接受一切 XYDataset 类型的数据源，下面讲解一下常用的 XYDataset 类型 TimeSeriesCollection 的使用方式。

//实例化： 
TimeSeriesCollection dataset=new TimeSeriesCollection(); 
//添加数据操作： 
dataset. addSeries(TimeSeries); // 后面讲解 TimeSeries 对象 
//删除数据操作： 
dataset. removeSeries(int index); 
//查询数据操作 : 
dataset. getSeries(int series); 

 

 

TimeSeries 对象操作

//实例化： 
TimeSeries ts=TimeSeries(String name, Class timePeriodClass); 
//增加数据操作： 
ts. add(RegularTimePeriod period, double value);  
//删除数据操作： 
ts. delete(RegularTimePeriod period);    
//修改数据操作： 
ts. update(RegularTimePeriod period, Number value); 
//查询数据操作： 
ts. getValue(RegularTimePeriod period); 

 

类 RegularTimePeriod 是 JFreeChart 提供的时间模板类，它有很多具体的时间类，比如： Minute 、 Second 、 Hour 、 Day…… 等，不再详述

package com.px1987.jfreechart;

import java.awt.Color;
import org.jfree.chart.ChartFactory;
import org.jfree.chart.ChartFrame;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.plot.XYPlot;
import org.jfree.chart.renderer.xy.XYItemRenderer;
import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;
import org.jfree.data.time.Day;
import org.jfree.data.time.Hour;
import org.jfree.data.time.Minute;
import org.jfree.data.time.TimeSeries;
import org.jfree.data.time.TimeSeriesCollection;
import org.jfree.data.xy.XYDataset;
import org.jfree.ui.RectangleInsets;

public class TestTimeSeriesChart {

	private static XYDataset createDataset() {
		TimeSeriesCollection dataset = new TimeSeriesCollection();
		Day day = new Day(21, 9, 2008);
		Hour hour22 = new Hour(22, day);
		Hour hour23 = new Hour(23, day);

		TimeSeries timeSeries1 = new TimeSeries("篮球火", Minute.class);
		timeSeries1.add(new Minute(25, hour23), 2.80);
		timeSeries1.add(new Minute(22, hour23), 2.59);
		timeSeries1.add(new Minute(32, hour22), 2.38);
		timeSeries1.add(new Minute(14, hour22), 2.35);
		timeSeries1.add(new Minute(18, hour23), 2.34);
		timeSeries1.add(new Minute(57, hour23), 2.31);
		timeSeries1.add(new Minute(14, hour23), 2.28);
		timeSeries1.add(new Minute(23, hour22), 2.25);
		timeSeries1.add(new Minute(46, hour22), 2.16);
		timeSeries1.add(new Minute(40, hour22), 2.16);
		timeSeries1.add(new Minute(6, hour22), 1.95);
		timeSeries1.add(new Minute(51, hour22), 1.93);
		timeSeries1.add(new Minute(2, hour23), 1.86);
		timeSeries1.add(new Minute(6, hour23), 1.84);
		timeSeries1.add(new Minute(9, hour23), 1.79);
		timeSeries1.add(new Minute(29, hour23), 1.72);

		TimeSeries timeSeries2 = new TimeSeries("无敌珊宝妹", Minute.class);
		timeSeries2.add(new Minute(36, hour22), 3.63);
		timeSeries2.add(new Minute(55, hour22), 3.63);
		timeSeries2.add(new Minute(21, hour23), 3.36);
		timeSeries2.add(new Minute(30, hour22), 3.28);
		timeSeries2.add(new Minute(33, hour23), 3.18);
		timeSeries2.add(new Minute(6, hour23), 3.13);
		timeSeries2.add(new Minute(13, hour22), 3.05);
		timeSeries2.add(new Minute(0, hour23), 2.98);
		timeSeries2.add(new Minute(40, hour22), 2.98);
		timeSeries2.add(new Minute(48, hour22), 2.91);
		timeSeries2.add(new Minute(14, hour23), 2.73);
		timeSeries2.add(new Minute(27, hour23), 2.59);
		timeSeries2.add(new Minute(38, hour23), 2.37);

		TimeSeries timeSeries3 = new TimeSeries("不良笑花", Minute.class);
		timeSeries3.add(new Minute(8, hour23), 2.84);
		timeSeries3.add(new Minute(29, hour22), 2.51);
		timeSeries3.add(new Minute(56, hour22), 2.23);
		timeSeries3.add(new Minute(5, hour23), 2.17);
		timeSeries3.add(new Minute(47, hour22), 2.10);
		timeSeries3.add(new Minute(17, hour22), 1.86);
		timeSeries3.add(new Minute(24, hour23), 1.84);
		timeSeries3.add(new Minute(5, hour22), 1.84);
		timeSeries3.add(new Minute(15, hour23), 1.73);
		timeSeries3.add(new Minute(36, hour22), 1.46);

		dataset.addSeries(timeSeries1);
		dataset.addSeries(timeSeries2);
		dataset.addSeries(timeSeries3);
		return dataset;
	}

	public static void createTimeSeriesChart() {
		JFreeChart timeSeriesChart = ChartFactory.createTimeSeriesChart(
				"台湾偶像剧收视率（2008-9-21）", "播放时间", "收视率百分点", createDataset(), true,
				true, false);
		timeSeriesChart.setBackgroundPaint(Color.YELLOW);
		XYPlot plot = timeSeriesChart.getXYPlot();
		setXYPolt(plot);

		ChartFrame frame = new ChartFrame("TestPieChart", timeSeriesChart);
		frame.pack();
		frame.setVisible(true);
	}

	public static void setXYPolt(XYPlot plot) {
		plot.setDomainGridlinePaint(Color.LIGHT_GRAY);
		plot.setRangeGridlinePaint(Color.LIGHT_GRAY);
		// plot.setAxisOffset(new RectangleInsets(5.0, 5.0, 5.0, 5.0));
		XYItemRenderer r = plot.getRenderer();
		if (r instanceof XYLineAndShapeRenderer) {
			XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) r;
			renderer.setBaseShapesVisible(true);
			renderer.setBaseShapesFilled(false);
		}
	}

	public static void main(String[] args) {
		createTimeSeriesChart();
	}

}

 效果图