JFreechart存储为PDF不能显示中文文字的解决办法

下面的代码是从jfreechart的Demo中复制后做了修改,demo中的代码存储pdf时,中文文字不能显示,解决的办法是

将 DefaultFontMapper mapper = new DefaultFontMapper();语句替换为
AsianFontMapper mapper = new AsianFontMapper("STSong-Light",
"UniGB-UCS2-H");
另外,在工程中要有iTextAsian.jar包,下面是能生成中文PDF的demo代码:

package com.example;

import java.awt.Font;
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 org.jfree.chart.ChartFactory;
import org.jfree.chart.JFreeChart;
import org.jfree.chart.title.TextTitle;
import org.jfree.data.general.SeriesException;
import org.jfree.data.time.Day;
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.AsianFontMapper;
import com.lowagie.text.pdf.BaseFont;
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;

//图表存为pdf时中文不能显示
/**
* 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 PDFExportDemo2 {

/**
* 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);

TimeSeriesCollection dataset = new TimeSeriesCollection();
dataset.addSeries(s1);
dataset.addSeries(s2);

return dataset;
}

public static void main(String[] args) throws DocumentException {
try {
// create a chart...
TimeSeries series = new TimeSeries("随机数据");
Day current = new Day(1, 1, 2000);
double value = 100.0;
for (int i = 0; i < 1000; i++) {
try {
value = value + Math.random() - 0.5;
series.add(current, new Double(value));
current = (Day) current.next();
} catch (SeriesException e) {
System.err.println("Error adding to series");
}
}
XYDataset data = new TimeSeriesCollection(series);
JFreeChart chart = ChartFactory.createTimeSeriesChart("Test测试",
"日期", "值", data, true, false, false);

String text="你好!";
Font font = new Font("SansSerif", Font.PLAIN, 12);

TextTitle subtitle = new TextTitle(text, font);
chart.addSubtitle(subtitle);

// DefaultFontMapper mapper = new DefaultFontMapper();
AsianFontMapper mapper = new AsianFontMapper("STSong-Light",
"UniGB-UCS2-H");
mapper.insertDirectory("C://WINDOWS//Fonts");
File fileName = new File(System.getProperty("user.home")
+ "/jfreechart2.pdf");
saveChartAsPDF(fileName, chart, 400, 300, mapper);
System.out.println("finished!");
} catch (IOException e) {
System.out.println(e.getMessage());
}
}

}