項目要求，沒辦法，生成的jsp頁面要打印。
于是要生成pdf大概查了一下itext主站的實例如下 ：
1
/**//*
2
* $Id: JFreeChartExample.java 1778 2005-06-02 11:05:39Z blowagie $
3 * $Name$
4 *
5 * This code is part of the 'iText Tutorial'.
6 * You can find the complete tutorial at the following address:
7 * http://itextdocs.lowagie.com/tutorial/
8 *
9 * This code is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 *
13 * itext-questions@lists.sourceforge.net
14
*/
15
package com.lowagie.examples.directcontent.graphics2D;
16
17import java.awt.Graphics2D;
18import java.awt.geom.Rectangle2D;
19import java.io.FileNotFoundException;
20import java.io.FileOutputStream;
21
22import org.jfree.chart.ChartFactory;
23import org.jfree.chart.JFreeChart;
24import org.jfree.chart.plot.PlotOrientation;
25import org.jfree.data.category.DefaultCategoryDataset;
26import org.jfree.data.general.DefaultPieDataset;
27import org.jfree.data.xy.XYSeries;
28import org.jfree.data.xy.XYSeriesCollection;
29
30import com.lowagie.text.Document;
31import com.lowagie.text.DocumentException;
32import com.lowagie.text.Rectangle;
33import com.lowagie.text.pdf.DefaultFontMapper;
34import com.lowagie.text.pdf.PdfContentByte;
35import com.lowagie.text.pdf.PdfTemplate;
36import com.lowagie.text.pdf.PdfWriter;
37
38/** *//** *//** *//**
39 * JFreeChart example.
40 */
41public class JFreeChartExample 
{
42
43
/** *//** *//** *//**
44 * Creates some PDFs with JFreeCharts.
45 * @param args no arguments needed
46
*/
47 public static void main(String[] args) {
48 System.out.println("JFreeChart example");
49 /** *//** *//** *//** the following line is a workaround for JDK 1.5 (fix by Adriaan Joubert) */
50 org.jfree.text.TextUtilities.setUseDrawRotatedStringWorkaround(false);
51 convertToPdf(getBarChart(), 400, 600, "barchart.pdf");
52 convertToPdf(getPieChart(), 400, 600, "piechart.pdf");
53 convertToPdf(getXYChart(), 400, 600, "xychart.pdf");
54 }
55
56 /** *//** *//** *//**
57 * Converts a JFreeChart to PDF syntax.
58 * @param filename the name of the PDF file
59 * @param chart the JFreeChart
60 * @param width the width of the resulting PDF
61 * @param height the height of the resulting PDF
62 */
63 public static void convertToPdf(JFreeChart chart, int width, int height, String filename) {
64 // step 1
65 Document document = new Document(new Rectangle(width, height));
66 try {
67 // step 2
68 PdfWriter writer;
69 writer = PdfWriter.getInstance(document, new FileOutputStream(filename));
70 // step 3
71 document.open();
72 // step 4
73 PdfContentByte cb = writer.getDirectContent();
74 PdfTemplate tp = cb.createTemplate(width, height);
75 Graphics2D g2d = tp.createGraphics(width, height, new DefaultFontMapper());
76 Rectangle2D r2d = new Rectangle2D.Double(0, 0, width, height);
77 chart.draw(g2d, r2d);
78 g2d.dispose();
79 cb.addTemplate(tp, 0, 0);
80 }
81 catch(DocumentException de) {
82 de.printStackTrace();
83 }
84 catch (FileNotFoundException e) {
85 e.printStackTrace();
86 }
87 // step 5
88 document.close();
89 }
90
91 /** *//** *//** *//**
92 * Gets an example barchart.
93 * @return a barchart
94 */
95 public static JFreeChart getBarChart() {
96 DefaultCategoryDataset dataset = new DefaultCategoryDataset();
97 dataset.setValue(40, "hits/hour", "index.html");
98 dataset.setValue(20, "hits/hour", "download.html");
99 dataset.setValue(15, "hits/hour", "faq.html");
100 dataset.setValue(8, "hits/hour", "links.html");
101 dataset.setValue(31, "hits/hour", "docs.html");
102 return ChartFactory.createBarChart("Popularity of iText pages",
103 "Page", "hits/hour", dataset,
104 PlotOrientation.VERTICAL, false, true, false);
105 }
106
107 /** *//** *//** *//**
108 * Gets an example piechart.
109 * @return a piechart
110 */
111 public static JFreeChart getPieChart() {
112 DefaultPieDataset dataset = new DefaultPieDataset();
113 dataset.setValue("iText", 60);
114 dataset.setValue("cinema.lowagie.com", 10);
115 dataset.setValue("tutorial", 30);
116 return ChartFactory.createPieChart(
117 "Website popularity",
118 dataset,
119 true,
120 true,
121 false);
122 }
123
124 /** *//** *//** *//**
125 * Gets an example XY chart
126 * @return an XY chart
127 */
128 public static JFreeChart getXYChart() {
129 XYSeries series = new XYSeries("XYGraph");
130 series.add(1, 5);
131 series.add(2, 7);
132 series.add(3, 3);
133 series.add(4, 5);
134 series.add(5, 4);
135 series.add(6, 5);
136 XYSeriesCollection dataset = new XYSeriesCollection();
137 dataset.addSeries(series);
138 return ChartFactory.createXYLineChart(
139 "XY Chart", "X-axis", "Y-axis", dataset,
140 PlotOrientation.VERTICAL, true, true, false);
141 }
142}
143
不過這里遇到了一些問題。一個是日文顯示的問題。一個是分頁后圖片坐標的處理：
生成Chart 之前的一個blog有記載。直接copy。生成了之后關鍵是如何把它加載在pdf文件里。
1 Map tempmap = new HashMap();
2 tempmap.put("_LocaleUtil", new LocaleUtil(Locale.JAPANESE));
3 MessageUtil mu =
4 new MessageUtil(
5 tempmap,
6 "jp.co.uss.cares100.message.bill.CaresRcdWeekPdf");
7 // ｐｄｆマージン 取得
8 int marginleft = Integer.parseInt(mu.get("marginleft"));
9 int marginright = Integer.parseInt(mu.get("marginright"));
10 int margintop = Integer.parseInt(mu.get("margintop"));
11 int marginbottom = Integer.parseInt(mu.get("marginbottom"));
12 String pageSize = mu.get("pageSize");
13
14 SimpleDateFormat df = new SimpleDateFormat("yyyyMMddHHmmss");
15 // 厳密な日付判定
16 df.setLenient(false);
17 String now = df.format(new Date());
18 String fileName = PDF_FILE_PREFIX + now + ".pdf";
19 DateFormat dateFormat =
20 DateFormat.getDateTimeInstance(
21 DateFormat.MEDIUM,
22 DateFormat.MEDIUM,
23 Locale.JAPAN);
24 res.reset();
25 res.setContentType("application/pdf");
26 res.setHeader(
27 "Content-Disposition",
28 "inline; filename="" + fileName + """);
29 res.setHeader("Cache-Control", "");
30 res.setHeader("Pragma", "");
31 BufferedOutputStream bufOutStream =
32 new BufferedOutputStream(res.getOutputStream());
33 Document document;
34 // ページサイズを設定する
35 if (pageSize.equalsIgnoreCase("A4")) {
36 document =
37 new Document(
38 PageSize.A4,
39 marginleft,
40 marginright,
41 margintop,
42 marginbottom);
43 // ページサイズを設定する
44 } else {
45 document =
46 new Document(
47 PageSize.A3,
48 marginleft,
49 marginright,
50 margintop,
51 marginbottom);
52 }
53 PdfWriter pdfwriter = PdfWriter.getInstance(document, bufOutStream);
54 // ドキュメントオープン
55 document.open();
56 //加載一個封面
57 document.add(CaresRecordDayPdfProcess.getFaceTable(req,document,(List)map.get("baseInfoList")));
58 document.newPage();
59 //加載頭信息
60 document.add(
61 getHeadTable(
62 map.get("userName").toString(),
63 map.get("baseInfo").toString(),
64 map.get("dateInfo").toString()));
65 document.add(getPhrase("● 介護記録"));
66 //加載數據table
67 document.add(
68 getDataTable(
69 (List) map.get("title1List"),
70 (List) map.get("data1List")));
71 //compute the height of the chart
72 int height = 405, dataCount = 0;//調節chart圖片的顯示Y坐標
73 dataCount = ((List) map.get("data1List")).size();
74 height = height - dataCount * 20;//table的row高度，每加一row那么圖片坐標就要低20
75 while(true){//分頁后應該顯示的Y坐標，A4紙的高度是800
76 if(height < 0){
77 height += 40*20;
78 }else{
79 if(height > 500){
80 document.newPage();
81 height = 510;
82 }
83 height -= 10;
84 break;
85 }
86 }
87 document.add(getPhrase("● バイタル"));
88 PdfContentByte cb = pdfwriter.getDirectContent();
89 PdfTemplate tp = cb.createTemplate(500, 300);
90 //這里很重要，解決了東方語言顯示的問題。
91 Graphics2D g2d =
92 tp.createGraphics(
93 500,
94 300,
95 new AsianFontMapper(
96 AsianFontMapper.JapaneseFont_Min,
97 AsianFontMapper.JapaneseEncoding_H));
98 Rectangle2D r2d = new Rectangle2D.Double(0, 0, 500, 300);
99 JFreeChart chart = getChart(map);
100 chart.draw(g2d, r2d);
101 g2d.dispose();
102 cb.addTemplate(tp, 48, height);
103 // ドキュメントクローズ
104 document.close();
105 bufOutStream.flush();
106 bufOutStream.close();
關鍵是以下幾段代碼：
a)生成pdf
1 public static void convertToPdf(JFreeChart chart, int width, int height, String filename) {
2 // step 1
3 Document document = new Document(new Rectangle(width, height));
4 try {
5 // step 2
6 PdfWriter writer;
7 writer = PdfWriter.getInstance(document, new FileOutputStream(filename));
8 // step 3
9 document.open();
10 // step 4
11 PdfContentByte cb = writer.getDirectContent();
12 PdfTemplate tp = cb.createTemplate(width, height);
13 Graphics2D g2d = tp.createGraphics(width, height, new DefaultFontMapper());
14 Rectangle2D r2d = new Rectangle2D.Double(0, 0, width, height);
15 chart.draw(g2d, r2d);
16 g2d.dispose();
17 cb.addTemplate(tp, 0, 0);
18 }
19 catch(DocumentException de) {
20 de.printStackTrace();
21 }
22 catch (FileNotFoundException e) {
23 e.printStackTrace();
24 }
25 // step 5
26 document.close();
27 }
b)漢語，日語和其他東方語言的支持：
1PdfContentByte cb = pdfwriter.getDirectContent();
2 PdfTemplate tp = cb.createTemplate(500, 300);
3 Graphics2D g2d =//關鍵部分
4 tp.createGraphics(
5 500,
6 300,
7 new AsianFontMapper(
8 AsianFontMapper.JapaneseFont_Min,
9 AsianFontMapper.JapaneseEncoding_H));
10 Rectangle2D r2d = new Rectangle2D.Double(0, 0, 500, 300);
11 JFreeChart chart = getChart(map);
12 chart.draw(g2d, r2d);
13 g2d.dispose();
14 cb.addTemplate(tp, 48, height);
需要加載的包是iTextAsian.jar
下載地址：http://sourceforge.net/project/downloading.php?groupname=itextpdf&filename=iTextAsian.jar&use_mirror=nchc
posted on 2008-11-25 10:26
Vincent-chen 閱讀(1150)
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