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pdf、ppt，还是doc、txt、pptx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doc、ppt、pdf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JODConverter将doc、ppt、txt、docx等文件转换为pdf文件。然后用SwfTools将pdf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 Office和OpenOffice。JODConverter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OpenOffice，JODConverter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：

Language  The names do not refer to countries.		Windows  Intel  MSI	Linux  Intel  RPM	Linux  Intel  DEB	Linux  x86-64 RPM	Linux  x86-64 DEB	Mac OS Intel  DMG	Mac OS PPC ¹ DMG	Solaris  Intel  PKG	Solaris  Sparc  PKG
Arabic	عربي	Download	Download	Download	Download	Download	Download		Download	Download
Basque	Euskara	Download	Download	Download	Download	Download	Download	Download	Download	Download
Bengali	বাংলা	Download	Download	Download	Download	Download	Download	Download	Download	Download
Bulgarian	български език	Download	Download	Download	Download	Download	Download		Download	Download
Catalan	Català	Download	Download	Download	Download	Download	Download	Download	Download	Download
Catalan (Valencian)	Català (Valencià)	Download	Download	Download	Download	Download	Download	not available	Download	Download
Chinese (simplified)	简体中文	Download	Download	Download	Download	Download	Download		Download	Download
Chinese (traditional)	正體中文	Download	Download	Download	Download	Download	Download		Download	Download
Czech	čeština	Download	Download	Download	Download	Download	Download		Download	Download
Danish	Dansk	Download	Download	Download	Download	Download	Download	3.2.1	Download	Download
Dutch	Nederlands	Download	Download	Download	Download	Download	Download	Download	Download	Download
English (British)	English (British)	Download	Download	Download	Download	Download	Download		Download	Download
English (US)	English (US)	Download	Download	Download	Download	Download	Download	3.2.1	Download	Download
Estonian	Eesti keel	Download	Download	Download	Download	Download	Download		Download	Download
Finnish	Suomi	Download		Download			3.2.1	Download	Download	Download
French	Français	Download	Download	Download	Download	Download	Download	Download	Download	Download
Galician	Galego	Download	Download	Download	Download	Download	Download		Download	Download
German	Deutsch	Download	3.2.1	Download	3.2.1	3.2.1	Download	3.2.0	Download	Download
Greek	Ελληνικά	Download	Download	Download	Download	Download	Download		Download	Download
Hebrew	עִבְרִית	Download	Download	Download	Download	Download	Download	Download	Download	Download
Hungarian	Magyar	Download	Download	Download	Download	Download	Download		Download	Download
Irish	Gaeilge	Download	Download	Download	Download	Download	Download		Download	Download
Italian	Italiano	Download	Download	Download	Download	Download	Download
Language  The names do not refer to countries.		Windows  Intel  MSI	Linux  Intel  RPM	Linux  Intel  DEB	Linux  x86-64 RPM	Linux  x86-64 DEB	Mac OS Intel  DMG	Mac OS PPC ¹ DMG	Solaris  Intel  PKG	Solaris  Sparc  PKG
Japanese	日本語	Download	Download	Download	Download	Download	Download	Download	Download	Download
Khmer	ភាសាខ្មែរ	Download	Download	Download	Download	Download	Download	3.2.1	Download	Download
Korean	한국어	Download	Download	Download			Download		Download	Download
Kurdish	Kurdî	3.2.1
Lithuanian	Lietuvių	Download	Download	Download	Download	Download	Download	3.0.1	Download	Download
Macedonian	Македонски	Download	Download	Download	Download	Download	Download	3.0.0	Download	Download
Mongolian	Монгол	3.0.0	3.0.0	3.0.0
Norwegian (Bokmål)	Norsk (Bokmål)	Download	Download	Download	Download	Download	Download		Download	Download
Norwegian (Nynorsk)	Norsk (Nynorsk)	3.2.0	3.2.0	3.2.0	3.2.0	3.2.0
Oromo	ኦሮሚኛ	Download	Download	Download	Download	Download	Download		Download	Download
Polish	Polski	Download	Download	Download	Download	Download	Download		Download	Download
Portuguese (Brazilian)	Português (do Brasil)	Download	Download	Download	Download	Download	Download		Download	Download
Portuguese (European)	Português (Europeu)	Download	Download	Download	3.2.1	3.2.1	Download		Download	Download
Russian	Русский	Download	Download	Download	Download	Download	Download		Download	Download
Serbian (Cyrillic)	Cрпски (ћирилицом)	Download	Download	Download	Download	Download	Download		Download	Download
Serbian (Latin)	Srpski (latinicom)	Download	Download	Download	Download	Download	Download		Download	Download
Slovenian	Slovenski jezik	Download	Download	Download	Download	Download	Download	Download	Download	Download
Spanish	Español	Download	Download	Download	Download	Download	Download	3.0.0	Download	Download
Swedish	Svenska	Download	Download	Download	Download	Download	Download	3.1.0	Download	Download
Turkish	Türkçe	Download	Download	Download	Download	Download	Download		Download	Download
Vietnamese	Tiếng Việt	Download	Download	Download	Download	Download	Download		Download	Download

    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的“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为“/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 Flash的swf格式文件的软件，可以运行在Linux、Mac、FreeBSD等Unix-like系统以及Windows系统上。它可以实现pdf、avi、wav、png、jpeg、gif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。

1、Windows（Linux和Mac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：

avi2swf inputFile -o outputFile
font2swf inputFile -o outputFile
gif2swf inputFile -o outputFile
jpeg2swf inputFile -o outputFile
pdf2swf inputFile -o outputFile
png2swf inputFile -o outputFile
wav2swf inputFile -o outputFile

avi2swf inputFile -o outputFile font2swf inputFile -o outputFile gif2swf inputFile -o outputFile jpeg2swf inputFile -o outputFile pdf2swf inputFile -o outputFile png2swf inputFile -o outputFile wav2swf inputFile -o outputFile

2、Linux（Windows和Mac用户可以忽略）

（1）安装依赖库

sudo apt-get install libpng12-dev
sudo apt-get install libjpeg62-dev
sudo apt-get install libgif-dev
sudo apt-get install libfreetype6-dev

sudo apt-get install libpng12-dev sudo apt-get install libjpeg62-dev sudo apt-get install libgif-dev sudo apt-get install libfreetype6-dev
（2）安装swftools

wget http://www.swftools.org/swftools-0.9.1.tar.gz
tar zxvf swftools-0.9.1.tar.gz
cd swftools-0.9.1
./configure
make
sudo make install

wget http://www.swftools.org/swftools-0.9.1.tar.gz tar zxvf swftools-0.9.1.tar.gz cd swftools-0.9.1 ./configure make sudo make install
（3）将其他文件格式转换为SWF

参考Windows平台上的SwfTools使用。

3、Mac（Windows和Linux用户可以忽略）

（1）安装swftools

最简单的方式，是用macport、fink等来安装。macport的命令为：

sudo port install swftools

sudo port install swftools
用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Mac的Shell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：

public class FileConverterUtil {
    public static String fileToSwf(String inputFilePath) {
        return pdfToSwf(fileToPdf(inputFilePath));
    }
    private static String fileToPdf(String inputFilePath) {
        //...
    }
    private static String pdfToSwf(String inputFilePath) {
        //...
    }
}

public class FileConverterUtil { public static String fileToSwf(String inputFilePath) { return pdfToSwf(fileToPdf(inputFilePath)); } private static String fileToPdf(String inputFilePath) { //... } private static String pdfToSwf(String inputFilePath) { //... } }

然后分别实现fileToPdf和pdfToSwf。fileToPdf中使用到JODConverter的API，如下：

import org.artofsolving.jodconverter.office.DefaultOfficeManagerConfiguration;
import org.artofsolving.jodconverter.office.OfficeManager;
import org.artofsolving.jodconverter.OfficeDocumentConverter;
import java.io.File;

private static String fileToPdf(String inputFilePath) {
    DefaultOfficeManagerConfiguration config = new DefaultOfficeManagerConfiguration();

    String officeHome = getOfficeHome();
    config.setOfficeHome(officeHome);

    OfficeManager officeManager = config.buildOfficeManager();
    officeManager.start();

    OfficeDocumentConverter converter = new OfficeDocumentConverter(officeManager);
    String outputFilePath = getOutputFilePath(inputFilePath);
    converter.convert(new File(inputFilePath), new File(outputFilePath));

    officeManager.stop();
}

import org.artofsolving.jodconverter.office.DefaultOfficeManagerConfiguration; import org.artofsolving.jodconverter.office.OfficeManager; import org.artofsolving.jodconverter.OfficeDocumentConverter; import java.io.File; private static String fileToPdf(String inputFilePath) { DefaultOfficeManagerConfiguration config = new DefaultOfficeManagerConfiguration(); String officeHome = getOfficeHome(); config.setOfficeHome(officeHome); OfficeManager officeManager = config.buildOfficeManager(); officeManager.start(); OfficeDocumentConverter converter = new OfficeDocumentConverter(officeManager); String outputFilePath = getOutputFilePath(inputFilePath); converter.convert(new File(inputFilePath), new File(outputFilePath)); officeManager.stop(); }
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。

private static String getOfficeHome(String inputFilePath) {
    String osName = System.getProperty("os.name");
    if (Pattern.matches("Linux.*", osName) {
        return "/opt/openoffice.org3";
    } else if (Pattern.matches("Windows.*", osName) {
        return "D:\\Applications\\OpenOffice.org 3";
    } else if (Pattern.matches("Mac.*", osName) {
        return "/Application/OpenOffice.org.app/Contents";
    }
    return null;
}

private static String getOfficeHome(String inputFilePath) { String osName = System.getProperty("os.name"); if (Pattern.matches("Linux.*", osName) { return "/opt/openoffice.org3"; } else if (Pattern.matches("Windows.*", osName) { return "D:\\Applications\\OpenOffice.org 3"; } else if (Pattern.matches("Mac.*", osName) { return "/Application/OpenOffice.org.app/Contents"; } return null; }

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。

private static String getOutputFilePath(String inputFilePath) {
    // Initialized by yourself.
}

private static String getOutputFilePath(String inputFilePath) { // Initialized by yourself. }
然后利用SwfTools 实现PdfToSwf 方法。

private static String pdfToSwf(String inputFilePath) {
    try {
        String outputFilePath = getOutputFilePath(inputFilePath);
        String[] command = new String[4];
        command[0] = getSwftoolsHome();
        command[1] = inputFilePath;
        command[2] = "-o";
        command[3] = outputFilePath;
        Process process = Runtime.getRuntime().exec(command);
        process.waitFor();
        return outputFilePath;
    } catch (Exception e) {
        // initialized by yourself.
    }
}

private static String pdfToSwf(String inputFilePath) { try { String outputFilePath = getOutputFilePath(inputFilePath); String[] command = new String[4]; command[0] = getSwftoolsHome(); command[1] = inputFilePath; command[2] = "-o"; command[3] = outputFilePath; Process process = Runtime.getRuntime().exec(command); process.waitFor(); return outputFilePath; } catch (Exception e) { // initialized by yourself. } }

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：

private static String getSwftoolsHome() {
    String osName = System.getProperty("os.name");
    if (Pattern.matches("Linux.*", osName) {
        return "/usr/local/bin";
    } else if (Pattern.matches("Windows.*", osName) {
        return "D:\\Program Files\\SwfTools";
    } else if (Pattern.matches("Mac.*", osName) {
        return "/usr/local/bin";
    }
    return null;
}

private static String getSwftoolsHome() { String osName = System.getProperty("os.name"); if (Pattern.matches("Linux.*", osName) { return "/usr/local/bin"; } else if (Pattern.matches("Windows.*", osName) { return "D:\\Program Files\\SwfTools"; } else if (Pattern.matches("Mac.*", osName) { return "/usr/local/bin"; } return null; }

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