pdf成生方法精品

最近由于项目需要，开始使用iText写PDF文件，从网上搜索到一些信息，但都是零碎的一些，现在稍微整理一下，仅限于写pdf文件部分。

首先创建一个pdfWriter的模板
1. /*
2. * Created on 2005-7-1
3. *
4. * TODO To change the template for this generated file go to
5. * Window - Preferences - Java - Code Style - Code Templates
6. */
7. package javax.print.PDF;
8.
9. import java.io.FileNotFoundException;
10. import java.io.FileOutputStream;
11. import java.io.IOException;
12.
13. import com.lowagie.text.Cell;
14. import com.lowagie.text.Document;
15. import com.lowagie.text.DocumentException;
16. import com.lowagie.text.Paragraph;
17. import com.lowagie.text.Rectangle;
18. import com.lowagie.text.Table;
19. import com.lowagie.text.pdf.PdfWriter;
20.
21. /**
22. * @author jcoder
23. * 
24. * TODO To change the template for this generated type comment go to Window -
25. * Preferences - Java - Code Style - Code Templates
26. */
27. abstract public class PDFWriter {
28.     protected Document document = null;
29.     protected FileOutputStream out = null;
30.     protected Rectangle pageSize = null;
31.     protected String filePath = null;
32.     protected Cell cell = null;
33.     protected Paragraph header = null;
34.     protected Paragraph prg = null;
35.     protected Table table = null;
36.
37.     public PDFWriter(String filePath) {
38.         try {
39.             this.filePath = filePath;
40.             document = new Document();
41.             out = new FileOutputStream(filePath);
42.             PdfWriter.getInstance(document, out);
43.             document.open();
44.         } catch (FileNotFoundException e) {
45.             // TODO Auto-generated catch block
46.             e.printStackTrace();
47.         } catch (DocumentException e) {
48.             // TODO Auto-generated catch block
49.             e.printStackTrace();
50.         }
51.
52.     }
53.
54.     public void close() {
55.         try {
56.             document.close();
57.             out.close();
58.         } catch (IOException e) {
59.             // TODO Auto-generated catch block
60.             e.printStackTrace();
61.         }
62.     }
63.
64. }

由于我需要在pdf中创建表格，要使用到com.lowagie.text.Cell，com.lowagie.text.Paragraph， com.lowagie.text.Table，com.lowagie.text.Cell，
com.lowagie.text.Chunk，com.lowagie.text.Font等类，cell为表格中的每个单元格的内容，paragraph为段落内容，cell的构造函数有很多，这里不一一列举了，因为我要用到中文字符，所以特别使用了cell(Element e)这个构造函数，Element为一个接口，实现此接口的类有很多，包含chunk,meta等，表明cell里可以添加很多不同的内容，可以实现自己的定制，chunk的构造函数为Chunk(String content,Font f)，在这里我定制了自己的cell，代码如下：
1. /*
2. * Created on 2005-7-1
3. *
4. * TODO To change the template for this generated file go to
5. * Window - Preferences - Java - Code Style - Code Templates
6. */
7. package javax.print.PDF;
8.
9. import com.lowagie.text.BadElementException;
10. import com.lowagie.text.Cell;
11. import com.lowagie.text.Chunk;
12. import com.lowagie.text.Font;
13.
14. /**
15. * @author jcoder
16. * 
17. * TODO To change the template for this generated type comment go to Window -
18. * Preferences - Java - Code Style - Code Templates
19. */
20. public class PDFCell extends Cell {
21.
22.     public PDFCell(String content, int rowspan, int colspan)
23.             throws BadElementException {
24.         super(new Chunk(content, PDFChineseFont
25.                 .createChineseFont(10, Font.NORMAL)));
26.         setRowspan(rowspan);
27.         setColspan(colspan);
28.         setHeader(false);
29.     }
30. }

稍许解释一下，rowspan和colspan为Cell的两个属性，写过网页的朋友都知道，表格中的行和列有的时候有必要进行合并，这里就实现了这个功能。

Paragraph类我也进行了封装：
1. /*
2. * Created on 2005-7-5
3. *
4. * TODO To change the template for this generated file go to
5. * Window - Preferences - Java - Code Style - Code Templates
6. */
7. package javax.print.PDF;
8.
9. import com.lowagie.text.Element;
10. import com.lowagie.text.Font;
11. import com.lowagie.text.Paragraph;
12.
13. /**
14. * @author Administrator
15. * 
16. * TODO To change the template for this generated type comment go to Window -
17. * Preferences - Java - Code Style - Code Templates
18. */
19. public class PDFParagragh extends Paragraph {
20.
21.     public PDFParagragh(String content, int alignment, int fontSize) {
22.         super(content, PDFChineseFont.createChineseFont(fontSize, Font.NORMAL));
23.         setAlignment(alignment);
24.     }
25.
26.     public static final int CENTER = Element.ALIGN_CENTER;
27.     public static final int LEFT = Element.ALIGN_LEFT;
28.     public static final int RIGHT = Element.ALIGN_RIGHT;
29.     public static final int TOP = Element.ALIGN_TOP;
30.     public static final int MIDDLE = Element.ALIGN_MIDDLE;
31.     public static final int BOTTOM = Element.ALIGN_BOTTOM;
32.
33. }


从以上两个代码段中可以看到PDFChineseFont.createChineseFont(int fontSize,int fontStyle)函数 这个也进行了封装，为自定义函数：
1. /*
2. * Created on 2005-7-1
3. *
4. * TODO To change the template for this generated file go to
5. * Window - Preferences - Java - Code Style - Code Templates
6. */
7. package javax.print.PDF;
8.
9. import java.io.IOException;
10.
11. import com.lowagie.text.DocumentException;
12. import com.lowagie.text.Font;
13. import com.lowagie.text.pdf.BaseFont;
14.
15. /**
16. * @author jcoder
17. * 
18. * TODO To change the template for this generated type comment go to Window -
19. * Preferences - Java - Code Style - Code Templates
20. */
21. public class PDFChineseFont {
22.     private static Font chineseFont;
23.
24.     public final static Font createChineseFont(int size, int style) {
25.         try {
26.             chineseFont = new Font(BaseFont.createFont("STSong-Light",
27.                     "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED), size, style);
28.         } catch (DocumentException e) {
29.             // TODO Auto-generated catch block
30.             e.printStackTrace();
31.         } catch (IOException e) {
32.             // TODO Auto-generated catch block
33.             e.printStackTrace();
34.         }
35.         return chineseFont;
36.     }
37. }
如果无此函数定义，生成的pdf文件中的中文字符将不显示。

最后实现自己定制好的pdf文档格式
1. /*
2. * Created on 2005-7-1
3. *
4. * TODO To change the template for this generated file go to
5. * Window - Preferences - Java - Code Style - Code Templates
6. */
7. package javax.print.PDF;
8.
9. import com.lowagie.text.BadElementException;
10. import com.lowagie.text.DocumentException;
11. import com.lowagie.text.Table;
12.
13. /**
14. * @author jcoder
15. * 
16. * TODO To change the template for this generated type comment go to Window -
17. * Preferences - Java - Code Style - Code Templates
18. */
19. public class MyWriter extends PDFWriter {
20.     public MyWriter(String path) {
21.         super(path);
22.         try {
23.             header = new PDFParagraph("仪器设备调拨单");
24.             document.add(header);
25.             table = new Table(14);
26. table.setBorderWidth(0);
27.             table.addCell(new PDFCell("（单价：500元以上含500元）", 1, 5));
28.             table.addCell(new PDFCell("2005年7月1号", 1, 9));
29.             document.add(table);
30.             table = new Table(14);
31. table.setBorderWidth(1);
32.             table.addCell(new PDFCell("设备编号", 1, 2));
33.             table.addCell(new PDFCell("设备名称", 1, 3));
34.             table.addCell(new PDFCell("型号规格", 1, 2));
35.             table.addCell(new PDFCell("数量", 1, 1));
36.             table.addCell(new PDFCell("单价", 1, 1));
37.             table.addCell(new PDFCell("总价", 1, 1));
38.             table.addCell(new PDFCell("附件", 1, 2));
39.             table.addCell(new PDFCell("备注", 1, 2));
40.             table.endHeaders();//换行
41.             table.addCell(new PDFCell("0126242245", 1, 2));
42.             table.addCell(new PDFCell("IBM大型机", 1, 3));
43.             table.addCell(new PDFCell("5465-445GH", 1, 2));
44.             table.addCell(new PDFCell("3", 1, 1));
45.             table.addCell(new PDFCell("299,000", 1, 1));
46.             table.addCell(new PDFCell("2,230,200", 1, 1));
47.             table.addCell(new PDFCell("无", 1, 2));
48.             table.addCell(new PDFCell("软件学院买入", 1, 2));
49.             table.endHeaders();
50.             table.addCell(new PDFCell("调出单位意见：", 1, 11));
51.             table.addCell(new PDFCell("院（系）签章", 1, 3));
52.             table.endHeaders();
53.             table.addCell(new PDFCell("申请调入单位意见：", 1, 11));
54.             table.addCell(new PDFCell("院（系）签章", 1, 3));
55.             table.endHeaders();
56.             table.addCell(new PDFCell("设备管理科审批：", 1, 5));
57.             table.addCell(new PDFCell("实验室与设备管理处审批", 1, 4));
58.             table.addCell(new PDFCell("校部审批：", 1, 5));
59.             table.endHeaders();
60.             document.add(table);
61.             close();//别忘记关闭
62.         } catch (BadElementException e) {
63.             // TODO Auto-generated catch block
64.             e.printStackTrace();
65.         } catch (DocumentException e) {
66.             // TODO Auto-generated catch block
67.             e.printStackTrace();
68.         }
69.     }
70. }


测试类：
1. /*
2. * Created on 2005-7-1
3. *
4. * TODO To change the template for this generated file go to
5. * Window - Preferences - Java - Code Style - Code Templates
6. */
7. package javax.print.PDF;
8.
9. /**
10. * @author jcoder
11. * 
12. * TODO To change the template for this generated type comment go to Window -
13. * Preferences - Java - Code Style - Code Templates
14. */
15. public class Test {
16.
17.     public static void main(String[] args) {
18.         PDFWriter pdf = new MyWriter("mine.pdf");
19.     }
20. }


写iText需要iText包 下载地址为http://prdownloads.sourceforge.net/itext/itext-1.3.jar
如果要加入中文，请再下载一个包，地址为：http://itext.sourceforge.net/downloads/iTextAsian.jar

写的比较浅，希望对大家会有帮助

http://www.javaresearch.org/article/31218.htm