一.要生成PDF文件首先要用到一个开源的iText工具，他的官方网页是
http://www.lowagie.com/iText/
他用来生成PDF文件
二.需要用的Jar包jfreechart-1.0.x.jar,jcommon-1.0.x.jar,itext-2.1.x.jar
三.简单的例子
import java.awt.Graphics2D;import java.awt.geom.Rectangle2D;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.text.SimpleDateFormat;import org.jfree.chart.ChartFactory;import org.jfree.chart.JFreeChart;import org.jfree.chart.axis.DateAxis;import org.jfree.chart.plot.XYPlot;import org.jfree.chart.renderer.xy.XYLineAndShapeRenderer;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 com.lowagie.text.Document;import com.lowagie.text.DocumentException;import com.lowagie.text.Rectangle;import com.lowagie.text.pdf.DefaultFontMapper;import com.lowagie.text.pdf.FontMapper;import com.lowagie.text.pdf.PdfContentByte;import com.lowagie.text.pdf.PdfTemplate;import com.lowagie.text.pdf.PdfWriter;/** * A simple demonstration showing how to write a chart to PDF format using * JFreeChart and iText. * <P> * You can download iText from http://www.lowagie.com/iText. */public class CreatePDF { /** * Saves a chart to a PDF file. * * @param file * the file. * @param chart * the chart. * @param width * the chart width. * @param height * the chart height. */ public static void saveChartAsPDF(File file, JFreeChart chart, int width,int height, FontMapper mapper) throws IOException { OutputStream out = new BufferedOutputStream(new FileOutputStream(file)); writeChartAsPDF(out, chart, width, height, mapper); out.close(); } /** * Writes a chart to an output stream in PDF format. * * @param out * the output stream. * @param chart * the chart. * @param width * the chart width. * @param height * the chart height. * */ public static void writeChartAsPDF(OutputStream out, JFreeChart chart, int width, int height, FontMapper mapper) throws IOException { Rectangle pagesize = new Rectangle(width, height); Document document = new Document(pagesize, 50, 50, 50, 50); try { PdfWriter writer = PdfWriter.getInstance(document, out); document.addAuthor("JFreeChart"); document.addSubject("Demonstration"); document.open(); PdfContentByte cb = writer.getDirectContent(); PdfTemplate tp = cb.createTemplate(width, height); Graphics2D g2 = tp.createGraphics(width, height, mapper); Rectangle2D r2D = new Rectangle2D.Double(0, 0, width, height); chart.draw(g2, r2D); g2.dispose(); cb.addTemplate(tp, 0, 0); } catch (DocumentException de) { System.err.println(de.getMessage()); } document.close(); } /** * Creates a dataset, consisting of two series of monthly data. * * * * @return the dataset. */ public static XYDataset createDataset() { TimeSeries s1 = new TimeSeries("L&G European Index Trust", Month.class); s1.add(new Month(2, 2001), 181.8); s1.add(new Month(3, 2001), 167.3); s1.add(new Month(4, 2001), 153.8); s1.add(new Month(5, 2001), 167.6); s1.add(new Month(6, 2001), 158.8); s1.add(new Month(7, 2001), 148.3); s1.add(new Month(8, 2001), 153.9); s1.add(new Month(9, 2001), 142.7); s1.add(new Month(10, 2001), 123.2); s1.add(new Month(11, 2001), 131.8); s1.add(new Month(12, 2001), 139.6); s1.add(new Month(1, 2002), 142.9); s1.add(new Month(2, 2002), 138.7); s1.add(new Month(3, 2002), 137.3); s1.add(new Month(4, 2002), 143.9); s1.add(new Month(5, 2002), 139.8); s1.add(new Month(6, 2002), 137.0); s1.add(new Month(7, 2002), 132.8); TimeSeries s2 = new TimeSeries("L&G UK Index Trust", Month.class); s2.add(new Month(2, 2001), 129.6); s2.add(new Month(3, 2001), 123.2); s2.add(new Month(4, 2001), 117.2); s2.add(new Month(5, 2001), 124.1); s2.add(new Month(6, 2001), 122.6); s2.add(new Month(7, 2001), 119.2); s2.add(new Month(8, 2001), 116.5); s2.add(new Month(9, 2001), 112.7); s2.add(new Month(10, 2001), 101.5); s2.add(new Month(11, 2001), 106.1); s2.add(new Month(12, 2001), 110.3); s2.add(new Month(1, 2002), 111.7); s2.add(new Month(2, 2002), 111.0); s2.add(new Month(3, 2002), 109.6); s2.add(new Month(4, 2002), 113.2); s2.add(new Month(5, 2002), 111.6); s2.add(new Month(6, 2002), 108.8); s2.add(new Month(7, 2002), 101.6); TimeSeries s3 = new TimeSeries("L&G UK Index Trust", Month.class); s3.add(new Month(2, 2001), 119.6); s3.add(new Month(3, 2001), 113.2); s3.add(new Month(4, 2001), 127.2); s3.add(new Month(5, 2001), 114.1); s3.add(new Month(6, 2001), 112.6); s3.add(new Month(7, 2001), 129.2); s3.add(new Month(8, 2001), 126.5); s3.add(new Month(9, 2001), 122.7); s3.add(new Month(10, 2001), 111.5); s3.add(new Month(11, 2001), 116.1); s3.add(new Month(12, 2001), 120.3); s3.add(new Month(1, 2002), 121.7); s3.add(new Month(2, 2002), 121.0); s3.add(new Month(3, 2002), 119.6); s3.add(new Month(4, 2002), 123.2); s3.add(new Month(5, 2002), 121.6); s3.add(new Month(6, 2002), 118.8); s3.add(new Month(7, 2002), 121.6); TimeSeriesCollection dataset = new TimeSeriesCollection(); dataset.addSeries(s1); dataset.addSeries(s2); dataset.addSeries(s3); return dataset; } public static void main(String[] args) { try { // create a chart... XYDataset dataset = createDataset(); JFreeChart chart = ChartFactory.createTimeSeriesChart("Legal & General Unit Trust Prices", "Date","Price Per Unit", dataset, true, true, false); // some additional chart customisation here... XYPlot plot = chart.getXYPlot(); XYLineAndShapeRenderer renderer = (XYLineAndShapeRenderer) plot.getRenderer(); renderer.setShapesVisible(true); DateAxis axis = (DateAxis) plot.getDomainAxis(); axis.setDateFormatOverride(new SimpleDateFormat("MMM-yyyy")); // write the chart to a PDF file... File fileName = new File("c://jfreechart1.pdf"); saveChartAsPDF(fileName, chart, 400, 300, new DefaultFontMapper()); } catch (IOException e) { System.out.println(e.getMessage()); } }}
相关资源：JFreeChart使用教程(中文).pdf
