java实现各种数据统计图（柱形图，饼图，折线图）

package demo; import com.lowagie.text.*; import com.lowagie.text.pdf.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.geom.Rectangle2D; import java.io.*; import java.lang.reflect.InvocationTargetException; import java.lang.reflect.Method; import javax.swing.*; import javax.swing.event.TreeSelectionEvent; import javax.swing.event.TreeSelectionListener; import javax.swing.filechooser.FileFilter; import javax.swing.tree.*; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.ui.*; // Referenced classes of package demo: // MemoryUsageDemo, DemoDescription public class SuperDemo extends ApplicationFrame implements ActionListener, TreeSelectionListener { static class DisplayDemo implements Runnable { public void run() { try { Class class1 = Class.forName(demoDescription.getClassName()); Method method = class1.getDeclaredMethod("createDemoPanel", null); JPanel jpanel = (JPanel)method.invoke(null, null); app.chartContainer.removeAll(); app.chartContainer.add(jpanel); app.displayPanel.validate(); String s = class1.getName(); String s1 = s; int i = s.lastIndexOf('.'); if(i > 0) s1 = s.substring(i + 1); s1 = s1 + ".html"; app.displayDescription(s1); } catch(ClassNotFoundException classnotfoundexception) { classnotfoundexception.printStackTrace(); } catch(NoSuchMethodException nosuchmethodexception) { nosuchmethodexception.printStackTrace(); } catch(InvocationTargetException invocationtargetexception) { invocationtargetexception.printStackTrace(); } catch(IllegalAccessException illegalaccessexception) { illegalaccessexception.printStackTrace(); } } private SuperDemo app; private DemoDescription demoDescription; public DisplayDemo(SuperDemo superdemo, DemoDescription demodescription) { app = superdemo; demoDescription = demodescription; } } static class PDFExportTask implements Runnable { public void run() { try { SuperDemo.saveChartAsPDF(file, chart, width, height, new DefaultFontMapper()); } catch(IOException ioexception) { ioexception.printStackTrace(); } } JFreeChart chart; int width; int height; File file; public PDFExportTask(JFreeChart jfreechart, int i, int j, File file1) { chart = jfreechart; file = file1; width = i; height = j; jfreechart.setBorderVisible(true); jfreechart.setPadding(new RectangleInsets(2D, 2D, 2D, 2D)); } } public SuperDemo(String s) { super(s); setContentPane(createContent()); setJMenuBar(createMenuBar()); } private JComponent createContent() { JPanel jpanel = new JPanel(new BorderLayout()); JTabbedPane jtabbedpane = new JTabbedPane(); JPanel jpanel1 = new JPanel(new BorderLayout()); jpanel1.setBorder(BorderFactory.createEmptyBorder(4, 4, 4, 4)); JSplitPane jsplitpane = new JSplitPane(1); JTree jtree = new JTree(createTreeModel()); jtree.addTreeSelectionListener(this); JScrollPane jscrollpane = new JScrollPane(jtree); jscrollpane.setPreferredSize(new Dimension(300, 100)); jsplitpane.setLeftComponent(jscrollpane); jsplitpane.setRightComponent(createChartDisplayPanel()); jpanel1.add(jsplitpane); jtabbedpane.add("Demos", jpanel1); MemoryUsageDemo memoryusagedemo = new MemoryUsageDemo(0x493e0); (new MemoryUsageDemo.DataGenerator(memoryusagedemo, 1000)).start(); jtabbedpane.add("Memory Usage", memoryusagedemo); jtabbedpane.add("Source Code", createSourceCodePanel()); jtabbedpane.setBorder(BorderFactory.createEmptyBorder(4, 4, 4, 4)); jpanel.add(jtabbedpane); return jpanel; } private JMenuBar createMenuBar() { JMenuBar jmenubar = new JMenuBar(); JMenu jmenu = new JMenu("File", true); jmenu.setMnemonic('F'); JMenuItem jmenuitem = new JMenuItem("Export to PDF...", 112); jmenuitem.setActionCommand("EXPORT_TO_PDF"); jmenuitem.addActionListener(this); jmenu.add(jmenuitem); jmenu.addSeparator(); JMenuItem jmenuitem1 = new JMenuItem("Exit", 120); jmenuitem1.setActionCommand("EXIT"); jmenuitem1.addActionListener(this); jmenu.add(jmenuitem1); jmenubar.add(jmenu); return jmenubar; } private JPanel createSourceCodePanel() { JPanel jpanel = new JPanel(new BorderLayout()); jpanel.setBorder(BorderFactory.createEmptyBorder(4, 4, 4, 4)); JEditorPane jeditorpane = new JEditorPane(); jeditorpane.setEditable(false); java.net.URL url = (demo.SuperDemo.class).getResource("source.html"); if(url != null) try { jeditorpane.setPage(url); } catch(IOException ioexception) { System.err.println("Attempted to read a bad URL: " + url); } else System.err.println("Couldn't find file: source.html"); JScrollPane jscrollpane = new JScrollPane(jeditorpane); jscrollpane.setVerticalScrollBarPolicy(20); jscrollpane.setPreferredSize(new Dimension(250, 145)); jscrollpane.setMinimumSize(new Dimension(10, 10)); jpanel.add(jscrollpane); return jpanel; } public void actionPerformed(ActionEvent actionevent) { String s = actionevent.getActionCommand(); if(s.equals("EXPORT_TO_PDF")) exportToPDF(); else if(s.equals("EXIT")) attemptExit(); } private void exportToPDF() { java.awt.Component component = chartContainer.getComponent(0); if(component instanceof ChartPanel) { JFileChooser jfilechooser = new JFileChooser(); jfilechooser.setName("untitled.pdf"); jfilechooser.setFileFilter(new FileFilter() { public boolean accept(File file) { return file.isDirectory() || file.getName().endsWith(".pdf"); } public String getDescription() { return "Portable Document Format (PDF)"; } } ); int i = jfilechooser.showSaveDialog(this); if(i == 0) { ChartPanel chartpanel = (ChartPanel)component; try { JFreeChart jfreechart = (JFreeChart)chartpanel.getChart().clone(); PDFExportTask pdfexporttask = new PDFExportTask(jfreechart, chartpanel.getWidth(), chartpanel.getHeight(), jfilechooser.getSelectedFile()); Thread thread = new Thread(pdfexporttask); thread.start(); } catch(CloneNotSupportedException clonenotsupportedexception) { clonenotsupportedexception.printStackTrac