Java操作PDF文件（BFO）

上一次我们用iText这个工具在Java环境下操作PDF文件，现在我们换一个工具：BFO

iText的确小巧，但是功能也有限制，只能简单的生成PDF文件，BFO却不同，能设置字体、版面等元素。

官方网站为： [url]http://big.faceless.org/products/pdf/[/url]

最新版本是：2.11.4

官方的解释： The Big Faceless Java PDF Library is the smartest Java PDF library for creating, editing, displaying and printing Acrobat PDF documents.

下载链接为： [url]http://big.faceless.org/products/bfopdf-2.11.4.zip[/url]

 

我的开发环境：JDK1.6+MyEclipse7+Tomcat5.5.27

首先在MyEclipse中新建一个项目BFO，将下载的jar文件放入该项目的类库中。

 

新建一个Class（类）CreateBook.java，Package（包）为com.bfo 代码如下：

package com.bfo;    
import org.faceless.pdf2.*;    
import java.util.Locale;    
import java.awt.Color;    
import java.util.*;    
import java.io.*;    
/**    
* 创建一个PDF文档，内容来源于一个TXT文本文件。    
*    
* author：小段    
*/    
public class CreateBook    
{    
         private static PDFStyle numstyle;    
         private static int pagenum = 1;    
         private static PDF pdf;    
         private static final String PAGESIZE = "A4-Landscape";    
         private static final float WIDTH, HEIGHT;    
         static {    
                PDFPage page = new PDFPage(PAGESIZE);    
                WIDTH    = (page.getWidth()/2) - 100;    
                HEIGHT = page.getHeight()        - 100;    
        }    
         public static void main(String args[]) throws IOException {    
                String filename = args.length > 0 ? args[0] : "C:\\bfo.txt";    
                 // 设置文本源文件，并且创建一个PDF对象。    
                pdf = new PDF();    
                pdf.setLocale(Locale.ENGLISH);    
                 // 创建一个新的PDF格式，设置字体（罗马字体）、字号（11）以及颜色（黑色）。    
                PDFStyle textstyle = new PDFStyle();    
                textstyle.setFont( new StandardFont(StandardFont.TIMES), 11);    
                textstyle.setFillColor(Color.black);    
                textstyle.setTextAlign(PDFStyle.TEXTALIGN_JUSTIFY);    
                numstyle = new PDFStyle();    
                numstyle.setFont( new StandardFont(StandardFont.TIMES), 8);    
                numstyle.setFillColor(Color.black);    
                numstyle.setTextAlign(PDFStyle.TEXTALIGN_CENTER);    
                LayoutBox chapter = new LayoutBox(WIDTH);    
                 int chapternumber = 0;    
                BufferedReader in = new BufferedReader( new FileReader(filename));    
                String line;    
                 long starttime = System.currentTimeMillis();    
                System.out.println( new Date()+ ": Starting file");    
                 // 文件开始被读取.    
                 while ((line=in.readLine())!= null) {    
                        line = line.trim();    
                         if (line.length()==0) {    
                                line = "\n\n";    
                        } else {    
                                line += " ";    
                        }    
                         // 调用requote方法。    
                        line = textstyle.getFont().requote(line, pdf.getLocale());    
                         // 开始将内容写进PDF文档。    
                         if (line.startsWith( "Chapter ")) {    
                                 if (chapternumber>0) {    
                                        System.out.println( new Date()+ ": Writing Chapter "+chapternumber);    
                                        writeChapter(chapter, chapternumber);    
                                }    
                                chapternumber++;    
                                chapter = new LayoutBox(WIDTH);    
                        }    
                        chapter.addText(line, textstyle, pdf.getLocale());    
                }    
                 // 将最后一个段落写入PDF文档    
                System.out.println( new Date()+ ": Writing Chapter "+chapternumber);    
                writeChapter(chapter, chapternumber);    
                System.out.println( new Date()+ ": Compressing and writing to file");    
                OutputStream out = new FileOutputStream( "C:\\BFO.pdf");    
                pdf.render(out);    
                out.close();    
                 // 显示操作PDF文档的总共时间。    
                System.out.println( "Total time was "+(System.currentTimeMillis()-starttime)+ "ms");    
        }    
         private static void writeChapter(LayoutBox chapter, int chapternumber) {    
                PDFPage page= null;    
                 boolean firstpage = true;    
                 float left;    
                 // 测量文本高度以前，必须清空缓存。    
                chapter.flush();    
                 while (chapter!= null) {    
                         // 清空布局格式。    
                        LayoutBox next= null;    
                         if (chapter.getHeight() > HEIGHT) {    
                                next = chapter.splitAt(HEIGHT);    
                        }    
                         if (pagenum%2 == 1) {    
                                page = pdf.newPage(PAGESIZE);    
                                left = 50;    
                                 // 写下页数。    
                                page.setStyle(numstyle);    
                                page.drawText( "Page "+ pagenum, page.getWidth()/4, 30);    
                                page.drawText( "Page "+ (pagenum+1), 3*page.getWidth()/4, 30);    
                        } else {    
                                 left = (page.getWidth()/2)+50;    
                        }    
                        page.drawLayoutBox(chapter, left, page.getHeight()-50);    
                        chapter = next;    
                        pagenum++;    
                         // 如果是第一页的话，添加一个书签。    
                         if (firstpage) {    
                                pdf.getBookmarks().add( new PDFBookmark( "Chapter "+chapternumber, PDFAction.goTo(page)));    
                                firstpage = false;    
                        }    
                }    
                 // 确定下一个段落应该写在剩下的页面。    
                pagenum |= 1;    
        }    
}

这是我C:\bfo.txt的内容：

 

运行CreateBook.java后，控制台显示信息：

 

同时发现C盘根目录下生成了bfo.pdf文件。打开内容为：

 

这样一来，我们就能将一个TXT文本文件转换成PDF文档。

当然了，上次说的iText工具也支持这样的转换，只不过BFO工具功能比较强大，实际应用更加广泛。

本文出自 “ 小段” 博客，请务必保留此出处 [url]http://xiaoduan.blog.51cto.com/502137/138339[/url]