2012-03-30 22:02:32|?次阅读|上传:wustguangh【已有?条评论】发表评论
关键词:Java, Swing, 界面设计|来源:唯设编程网
前面的文章介绍了Java使用JFreeChart绘制柱状图、折线图和饼形图的方法,本文继续介绍JFreeChart的使用方法,本文将着重介绍Swing客户端程序使用 JFreeChart在窗体中绘制时序图的方法,依然会给出程序的运行效果和实际的Java源代码。
首先展示程序的运行效果:
package Test.JFreeChar; import java.awt.Color; import java.awt.Dimension; import java.awt.Font; import java.io.IOException; import java.io.PrintWriter; import java.text.SimpleDateFormat; import javax.servlet.http.HttpSession; import javax.swing.JPanel; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.ChartRenderingInfo; import org.jfree.chart.ChartUtilities; import org.jfree.chart.JFreeChart; import org.jfree.chart.StandardChartTheme; import org.jfree.chart.axis.DateAxis; import org.jfree.chart.entity.StandardEntityCollection; import org.jfree.chart.plot.XYPlot; import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer; import org.jfree.chart.servlet.ServletUtilities; import org.jfree.data.time.Month; import org.jfree.data.time.TimeSeries; import org.jfree.data.time.TimeSeriesCollection; import org.jfree.data.xy.XYDataset; import org.jfree.ui.ApplicationFrame; import org.jfree.ui.RectangleInsets; import org.jfree.ui.RefineryUtilities; /** * JFreeChar时序图例子 * */ public class TimeSeriesDemo extends ApplicationFrame { private static final long serialVersionUID = -4172191391806537567L; public TimeSeriesDemo(String s) { super(s); XYDataset xydataset = createDataset(); JFreeChart jfreechart = createChart(xydataset); ChartPanel chartpanel = new ChartPanel(jfreechart, false); chartpanel.setPreferredSize(new Dimension(500, 270)); chartpanel.setMouseZoomable(true, false); setContentPane(chartpanel); } private static JFreeChart createChart(XYDataset xydataset) { //这里的"name"参数;是什么意思我也不知道,反正这样可以用 StandardChartTheme standardChartTheme = new StandardChartTheme("name"); //可以改变轴向的字体 standardChartTheme.setLargeFont(new Font("楷体",Font.BOLD, 12)); //可以改变图例的字体 standardChartTheme.setRegularFont(new Font("宋体",Font.BOLD, 8)); //可以改变图标的标题字体 standardChartTheme.setExtraLargeFont(new Font("隶书", Font.BOLD, 20)); ChartFactory.setChartTheme(standardChartTheme);// 设置主题 JFreeChart jfreechart = ChartFactory.createTimeSeriesChart( "Legal & General Unit Trust Prices", "Date", "Price Per Unit", xydataset, true, true, true); jfreechart.setBackgroundPaint(Color.white); XYPlot xyplot = (XYPlot) jfreechart.getPlot(); xyplot.setBackgroundPaint(Color.GREEN); xyplot.setDomainGridlinePaint(Color.white); xyplot.setRangeGridlinePaint(Color.white); xyplot.setAxisOffset(new RectangleInsets(5D, 5D, 5D, 5D)); xyplot.setDomainCrosshairVisible(true); xyplot.setRangeCrosshairVisible(true); org.jfree.chart.renderer.xy.XYItemRenderer xyitemrenderer = xyplot .getRenderer(); if (xyitemrenderer instanceof XYLineAndShapeRenderer) { XYLineAndShapeRenderer xylineandshaperenderer = (XYLineAndShapeRenderer) xyitemrenderer; xylineandshaperenderer.setBaseShapesVisible(true); xylineandshaperenderer.setBaseShapesFilled(true); } DateAxis dateaxis = (DateAxis) xyplot.getDomainAxis(); dateaxis.setDateFormatOverride(new SimpleDateFormat("MMM-yyyy")); return jfreechart; } private static XYDataset createDataset() { TimeSeries timeseries = new TimeSeries("L&G European Index Trust", org.jfree.data.time.Month.class); timeseries.add(new Month(2, 2001), 181.80000000000001D); timeseries.add(new Month(3, 2001), 167.30000000000001D); timeseries.add(new Month(4, 2001), 153.80000000000001D); timeseries.add(new Month(5, 2001), 167.59999999999999D); timeseries.add(new Month(6, 2001), 158.80000000000001D); timeseries.add(new Month(7, 2001), 148.30000000000001D); timeseries.add(new Month(8, 2001), 153.90000000000001D); timeseries.add(new Month(9, 2001), 142.69999999999999D); timeseries.add(new Month(10, 2001), 123.2D); timeseries.add(new Month(11, 2001), 131.80000000000001D); timeseries.add(new Month(12, 2001), 139.59999999999999D); timeseries.add(new Month(1, 2002), 142.90000000000001D); timeseries.add(new Month(2, 2002), 138.69999999999999D); timeseries.add(new Month(3, 2002), 137.30000000000001D); timeseries.add(new Month(4, 2002), 143.90000000000001D); timeseries.add(new Month(5, 2002), 139.80000000000001D); timeseries.add(new Month(6, 2002), 137D); timeseries.add(new Month(7, 2002), 132.80000000000001D); TimeSeries timeseries1 = new TimeSeries("L&G UK Index Trust", org.jfree.data.time.Month.class); timeseries1.add(new Month(2, 2001), 129.59999999999999D); timeseries1.add(new Month(3, 2001), 123.2D); timeseries1.add(new Month(4, 2001), 117.2D); timeseries1.add(new Month(5, 2001), 124.09999999999999D); timeseries1.add(new Month(6, 2001), 122.59999999999999D); timeseries1.add(new Month(7, 2001), 119.2D); timeseries1.add(new Month(8, 2001), 116.5D); timeseries1.add(new Month(9, 2001), 112.7D); timeseries1.add(new Month(10, 2001), 101.5D); timeseries1.add(new Month(11, 2001), 106.09999999999999D); timeseries1.add(new Month(12, 2001), 110.3D); timeseries1.add(new Month(1, 2002), 111.7D); timeseries1.add(new Month(2, 2002), 111D); timeseries1.add(new Month(3, 2002), 109.59999999999999D); timeseries1.add(new Month(4, 2002), 113.2D); timeseries1.add(new Month(5, 2002), 111.59999999999999D); timeseries1.add(new Month(6, 2002), 108.8D); timeseries1.add(new Month(7, 2002), 101.59999999999999D); TimeSeriesCollection timeseriescollection = new TimeSeriesCollection(); timeseriescollection.addSeries(timeseries); timeseriescollection.addSeries(timeseries1); return timeseriescollection; } public static JPanel createDemoPanel() { JFreeChart jfreechart = createChart(createDataset()); return new ChartPanel(jfreechart); } // 根据JFreeChart对象生成对应的图片 public static String generateLineChart(HttpSession session, PrintWriter pw) { String filename = null; JFreeChart chart = createChart(createDataset()); // chart.setBackgroundPaint(java.awt.Color.white); ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection()); try { filename = ServletUtilities.saveChartAsPNG(chart, 500, 350, info, session); } catch (IOException e) { e.printStackTrace(); } try { ChartUtilities.writeImageMap(pw, filename, info, false); } catch (IOException e) { e.printStackTrace(); } pw.flush(); return filename; } public static void main(String args[]) { TimeSeriesDemo timeseriesdemo1 = new TimeSeriesDemo("Time Series Demo 1"); timeseriesdemo1.pack(); RefineryUtilities.centerFrameOnScreen(timeseriesdemo1); timeseriesdemo1.setVisible(true); } }
好了,详细你已经会利用JFreeChart进行时序图(TimeSeries)的绘制,并将其显示在Swing窗体上了吧!