jfreechart例子

/* * This software is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. * * --------------------------- * WebHitChart.java * --------------------------- * (C) Copyright 2002-2004, by Richard Atkinson. * * Original Author: Richard Atkinson; */ package org.jfree.chart.demo.servlet; import java.awt.*; import java.awt.geom.Ellipse2D; import java.io.PrintWriter; import java.text.SimpleDateFormat; import java.util.Date; import java.util.ArrayList; import java.util.Iterator; import java.util.Locale; import java.text.NumberFormat; import javax.servlet.http.HttpSession; import org.jfree.data.*; import org.jfree.chart.*; import org.jfree.chart.axis.*; import org.jfree.chart.renderer.BarRenderer; import org.jfree.chart.renderer.StandardXYItemRenderer; import org.jfree.chart.renderer.StackedXYAreaRenderer; import org.jfree.chart.renderer.XYAreaRenderer; import org.jfree.chart.plot.*; import org.jfree.chart.entity.*; import org.jfree.chart.labels.*; import org.jfree.chart.urls.*; import org.jfree.chart.servlet.*; public class WebHitChart { public static String generateBarChart(Date hitDate, HttpSession session, PrintWriter pw) { String filename = null; try { // Retrieve list of WebHits WebHitDataSet whDataSet = new WebHitDataSet(); ArrayList list = whDataSet.getDataBySection(hitDate); // Throw a custom NoDataException if there is no data if (list.size() == 0) { System.out.println("No data has been found"); throw new NoDataException(); } // Create and populate a CategoryDataset Iterator iter = list.listIterator(); DefaultCategoryDataset dataset = new DefaultCategoryDataset(); while (iter.hasNext()) { WebHit wh = (WebHit)iter.next(); dataset.addValue(new Long(wh.getHitCount()), "Hits", wh.getSection()); } // Create the chart object CategoryAxis categoryAxis = new CategoryAxis(""); ValueAxis valueAxis = new NumberAxis(""); BarRenderer renderer = new BarRenderer(); renderer.setItemURLGenerator(new StandardCategoryURLGenerator("xy_chart.jsp","series","section")); renderer.setToolTipGenerator(new StandardCategoryToolTipGenerator()); Plot plot = new CategoryPlot(dataset, categoryAxis, valueAxis, renderer); JFreeChart chart = new JFreeChart("", JFreeChart.DEFAULT_TITLE_FONT, plot, false); chart.setBackgroundPaint(java.awt.Color.white); // Write the chart image to the temporary directory ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection()); filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, info, session); // Write the image map to the PrintWriter ChartUtilities.writeImageMap(pw, filename, info); pw.flush(); } catch (NoDataException e) { System.out.println(e.toString()); filename = "public_nodata_500x300.png"; } catch (Exception e) { System.out.println("Exception - " + e.toString()); e.printStackTrace(System.out); filename = "public_error_500x300.png"; } return filename; } public static String generatePieChart(Date hitDate, HttpSession session, PrintWriter pw) { String filename = null; try { // Retrieve list of WebHits WebHitDataSet whDataSet = new WebHitDataSet(); ArrayList list = whDataSet.getDataBySection(hitDate); // Throw a custom NoDataException if there is no data if (list.size() == 0) { System.out.println("No data has been found"); throw new NoDataException(); } // Create and populate a PieDataSet DefaultPieDataset data = new DefaultPieDataset(); Iterator iter = list.listIterator(); while (iter.hasNext()) { WebHit wh = (WebHit)iter.next(); data.setValue(wh.getSection(), new Long(wh.getHitCount())); } // Create the chart object PiePlot plot = new PiePlot(data); plot.setInsets(new Insets(0, 5, 5, 5)); plot.setURLGenerator(new StandardPieURLGenerator("xy_chart.jsp","section")); plot.setToolTipGenerator(new StandardPieItemLabelGenerator()); JFreeChart chart = new JFreeChart("", JFreeChart.DEFAULT_TITLE_FONT, plot, true); chart.setBackgroundPaint(java.awt.Color.white); // Write the chart image to the temporary directory ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection()); filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, info, session); // Write the image map to the PrintWriter ChartUtilities.writeImageMap(pw, filename, info); pw.flush(); } catch (NoDataException e) { System.out.println(e.toString()); filename = "public_nodata_500x300.png"; } catch (Exception e) { System.out.println("Exception - " + e.toString()); e.printStackTrace(System.out); filename = "public_error_500x300.png"; } return filename; } public static String generateXYChart(String section, HttpSession session, PrintWriter pw) { String filename = null; try { // Retrieve list of WebHits WebHitDataSet whDataSet = new WebHitDataSet(); ArrayList list = whDataSet.getDataByHitDate(section); // Throw a custom NoDataException if there is no data if (list.size() == 0) { System.out.println("No data has been found"); throw new NoDataException(); } // Create and populate an XYSeries Collection XYSeries dataSeries = new XYSeries("Hits"); Iterator iter = list.listIterator(); while (iter.hasNext()) { WebHit wh = (WebHit)iter.next(); dataSeries.add(wh.getHitDate().getTime(),wh.getHitCount()); } XYSeriesCollection xyDataset = new XYSeriesCollection(dataSeries); // Create tooltip and URL generators SimpleDateFormat sdf = new SimpleDateFormat("dd-MMM-yyyy", Locale.UK); StandardXYToolTipGenerator ttg = new StandardXYToolTipGenerator( StandardXYToolTipGenerator.DEFAULT_TOOL_TIP_FORMAT, sdf, NumberFormat.getInstance()); TimeSeriesURLGenerator urlg = new TimeSeriesURLGenerator( sdf, "pie_chart.jsp", "series", "hitDate"); // Create the chart object ValueAxis timeAxis = new DateAxis(""); NumberAxis valueAxis = new NumberAxis(""); valueAxis.setAutoRangeIncludesZero(false); // override default StandardXYItemRenderer renderer = new StandardXYItemRenderer( StandardXYItemRenderer.LINES + StandardXYItemRenderer.SHAPES, ttg, urlg); renderer.setShapesFilled(true); XYPlot plot = new XYPlot(xyDataset, timeAxis, valueAxis, renderer); JFreeChart chart = new JFreeChart("", JFreeChart.DEFAULT_TITLE_FONT, plot, false); chart.setBackgroundPaint(java.awt.Color.white); // Write the chart image to the temporary directory ChartRenderingInfo info = new ChartRenderingInfo(new StandardEntityCollection()); filename = ServletUtilities.saveChartAsPNG(chart, 500, 300, info, session); // Write the image map to the PrintWriter ChartUtilities.writeImageMap(pw, filename, info); pw.flush(); } catch (NoDataException e) { System.out.println(e.toString()); filename = "public_nodata_500x300.png"; } catch (Exception e) { System.out.println("Exception - " + e.toString()); e.printStackTrace(System.out); filename = "public_error_500x300.png"; } return filename; } public static String generateXYAreaChart(HttpSession session, PrintWriter pw) { String filename = null; try { // Retrieve list of WebHits for each section and populate a TableXYDataset WebHitDataSet whDataSet = new WebHitDataSet(); ArrayList sections = whDataSet.getSections(); Iterator sectionIter = sections.iterator(); DefaultTableXYDataset dataset = new DefaultTableXYDataset();