实现一个具有百度文库文档转换功能的工具类

用过百度文库、豆丁的朋友,都知道,我们只要将文档上传到这些网站上,就可以实现分享。无论你上传的是pdfppt,还是doctxtpptx文件,都会在网页上显示给用户看。从技术上简单地说,可以分成三步:


1)将格式为x的文档文件上传到服务器;

2)在服务器上完成文档的相关处理;

3)将处理后的结果展示在网页上。


其中最关键的一步就是(2)。做技术的人都可以很容易地看出来,这类用web应用是用flash显示出来的。那么,一个文档文件,是如何转换为swf文件的呢?本文就将为你介绍,如何避免再造车轮的冗余行为发生,而借助高效的工具将docpptpdf等文档文件转换为swf格式。比如百度文库接收用户上传的文件后,显示在网页上时是其转换成的SWF格式文件。这样就很适合Web应用了。


一、JODConverter


首先利用JODConverterdocppttxtdocx等文件转换为pdf文件。然后用SwfToolspdf文件转换为swf文件。JODConverter是一个名叫Java OpenDocument Converter的基于LGPL协议的软件,用于实现不同的office格式之间的转换,这些office格式包括Microsoft OfficeOpenOfficeJODConverter的项目主页是http://www.artofsolving.com/opensource/jodconverter,可以查看更多的信息。可以通过SourceForge.net下载。


首先要安装OpenOfficeJODConverter的功能,基本就是实现了OpenOffice中的另存为的功能。个版本的OpenOffice的下载地址为:


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The names do not refer to countries.

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Intel

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DMG

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Solaris

Intel

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عربي

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বাংলা

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Bulgarian

български език

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Catalan

Català

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Chinese (simplified)

简体中文

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Chinese (traditional)

正體中文

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čeština

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Dansk

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Dutch

Nederlands

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English (British)

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Eesti keel

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Suomi

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Français

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Galician

Galego

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German

Deutsch

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Greek

Ελληνικά

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עִבְרִית

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Hungarian

Magyar

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Irish

Gaeilge

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Italian

Italiano

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The names do not refer to countries.

Windows

Intel

MSI

Linux

Intel

RPM

Linux

Intel

DEB

Linux

x86-64

RPM

Linux

x86-64

DEB

MacOS

Intel

DMG

MacOS

PPC¹

DMG

Solaris

Intel

PKG

Solaris

Sparc

PKG

Japanese

日本語

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Khmer

ភាសាខ្មែរ

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Korean

한국어

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Kurdish

Kurdî

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Lithuanian

Lietuvių

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Macedonian

Македонски

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Mongolian

Монгол

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Norsk (Bokmål)

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Oromo

ኦሮሚኛ

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Polish

Polski

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Portuguese (Brazilian)

Português (do Brasil)

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Portuguese (European)

Português (Europeu)

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Russian

Русский

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Serbian (Cyrillic)

Cрпски (ћирилицом)

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Serbian (Latin)

Srpski (latinicom)

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Slovenian

Slovenski jezik

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Spanish

Español

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3.0.0

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Swedish

Svenska

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3.1.0

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Turkish

Türkçe

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Vietnamese

Tiếng Việt

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安装完OpenOffice后,要记住你的OfficeHome。不同平台的OfficeHome是不同的。比如你将OpenOffice安装到Windows“D:\Program Files\OpenOffice.org 3”,那么这就是你在Windows上的OfficeHome。如果你是Linux用户,你可能会将OpenOffice安装到“/opt/openoffice.org3”,这就是你的OfficeHome。如果你是Mac用户,在Mac系统的自动安装后,你需要知道你的OfficeHome“/Application/OpenOffice.org.app/Contents”

一定要知道你的OfficeHome,否则JODConverter是没法工作的。然后下载JODConverter API,下载页:http://sourceforge.net/projects/jodconverter/


二、SwfTools


然后利用SwfTools就中间生成的pdf文件,转换为swf文件。SwfTools是将各种不同格式的文件转换为Adobe Flashswf格式文件的软件,可以运行在LinuxMacFreeBSDUnix-like系统以及Windows系统上。它可以实现pdfaviwavpngjpeggif等格式向swf格式的转换。该项目主页是http://www.swftools.org/,在http://www.swftools.org/download.htmlx下载


1WindowsLinuxMac用户可以忽略)

1)下载安装swftools

下载地址:swftools-0.9.1.exe

安装目录:D:\Program Files\swftools


2)将不同格式的文件转换为SWF

使用安装目录下的转换命令:

  1. avi2swfinputFile-ooutputFile
  2. font2swfinputFile-ooutputFile
  3. gif2swfinputFile-ooutputFile
  4. jpeg2swfinputFile-ooutputFile
  5. pdf2swfinputFile-ooutputFile
  6. png2swfinputFile-ooutputFile
  7. wav2swfinputFile-ooutputFile



2LinuxWindowsMac用户可以忽略)

1)安装依赖库

  1. sudoapt-getinstalllibpng12-dev
  2. sudoapt-getinstalllibjpeg62-dev
  3. sudoapt-getinstalllibgif-dev
  4. sudoapt-getinstalllibfreetype6-dev

2)安装swftools

  1. wgethttp://www.swftools.org/swftools-0.9.1.tar.gz
  2. tarzxvfswftools-0.9.1.tar.gz
  3. cdswftools-0.9.1
  4. ./configure
  5. make
  6. sudomakeinstall

3)将其他文件格式转换为SWF

参考Windows平台上的SwfTools使用。


3MacWindowsLinux用户可以忽略)

1)安装swftools

最简单的方式,是用macportfink等来安装。macport的命令为:

  1. sudoportinstallswftools

MacPort 安装SwfTools ,不需要考虑其依赖库,MacPort 会帮助你安装好。MacPort 的安装,请参考《Mac OS X Lion安装MacPorts(让你在MacShell下更加游刃有余)》一文。


2)将其他文件格式转换为SWF

参考Windows平台上的SwfTools使用。


三、Java实例实现各office文件格式向swf的转换


创建一个实现类型转换的工具类,命名为FileConverterUtil,如下:


  1. publicclassFileConverterUtil{
  2. publicstaticStringfileToSwf(StringinputFilePath){
  3. returnpdfToSwf(fileToPdf(inputFilePath));
  4. }
  5. privatestaticStringfileToPdf(StringinputFilePath){
  6. //...
  7. }
  8. privatestaticStringpdfToSwf(StringinputFilePath){
  9. //...
  10. }
  11. }


然后分别实现fileToPdfpdfToSwffileToPdf中使用到JODConverterAPI,如下:


  1. importorg.artofsolving.jodconverter.office.DefaultOfficeManagerConfiguration;
  2. importorg.artofsolving.jodconverter.office.OfficeManager;
  3. importorg.artofsolving.jodconverter.OfficeDocumentConverter;
  4. importjava.io.File;
  5. privatestaticStringfileToPdf(StringinputFilePath){
  6. DefaultOfficeManagerConfigurationconfig=newDefaultOfficeManagerConfiguration();
  7. StringofficeHome=getOfficeHome();
  8. config.setOfficeHome(officeHome);
  9. OfficeManagerofficeManager=config.buildOfficeManager();
  10. officeManager.start();
  11. OfficeDocumentConverterconverter=newOfficeDocumentConverter(officeManager);
  12. StringoutputFilePath=getOutputFilePath(inputFilePath);
  13. converter.convert(newFile(inputFilePath),newFile(outputFilePath));
  14. officeManager.stop();
  15. }

其中getOfficeHome()可以根据你使用该工具类的平台增加程序的可移植性。fileToPdf可以实现各种office文件到pdf文件的转换。


  1. privatestaticStringgetOfficeHome(StringinputFilePath){
  2. StringosName=System.getProperty("os.name");
  3. if(Pattern.matches("Linux.*",osName){
  4. return"/opt/openoffice.org3";
  5. }elseif(Pattern.matches("Windows.*",osName){
  6. return"D:\\Applications\\OpenOffice.org3";
  7. }elseif(Pattern.matches("Mac.*",osName){
  8. return"/Application/OpenOffice.org.app/Contents";
  9. }
  10. returnnull;
  11. }


提供统一的转换文件命名规则,可以提供如下方法,具体实现看你应用场景的方便性了。


  1. privatestaticStringgetOutputFilePath(StringinputFilePath){
  2. //Initializedbyyourself.
  3. }

然后利用SwfTools 实现PdfToSwf 方法。


  1. privatestaticStringpdfToSwf(StringinputFilePath){
  2. try{
  3. StringoutputFilePath=getOutputFilePath(inputFilePath);
  4. String[]command=newString[4];
  5. command[0]=getSwftoolsHome();
  6. command[1]=inputFilePath;
  7. command[2]="-o";
  8. command[3]=outputFilePath;
  9. Processprocess=Runtime.getRuntime().exec(command);
  10. process.waitFor();
  11. returnoutputFilePath;
  12. }catch(Exceptione){
  13. //initializedbyyourself.
  14. }
  15. }


其中getSwftoolsHome方法就是获取你的SwfTools所在目录,依据不同平台,你可以如下实现该方法:


  1. privatestaticStringgetSwftoolsHome(){
  2. StringosName=System.getProperty("os.name");
  3. if(Pattern.matches("Linux.*",osName){
  4. return"/usr/local/bin";
  5. }elseif(Pattern.matches("Windows.*",osName){
  6. return"D:\\ProgramFiles\\SwfTools";
  7. }elseif(Pattern.matches("Mac.*",osName){
  8. return"/usr/local/bin";
  9. }
  10. returnnull;
  11. }

这样类似于百度文库、豆丁网的文档转换工具的核心功能就基本实现了。Enjoy It


转载请注明来自“柳大的CSDN博客”,原文地址:http://blog.csdn.net/poechant/article/details/7238056

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