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实现一个具有百度文库文档转换功能的工具类

    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


    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:


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

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Euskara

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বাংলা

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Bulgarian

български език

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Catalan

Català

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Catalan (Valencian)

Català (Valencià)

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not available

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Chinese (simplified)

简体中文

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Chinese (traditional)

正體中文

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Czech

čeština

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Danish

Dansk

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3.2.1

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Dutch

Nederlands

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English (British)

English (British)

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English (US)

English (US)

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Estonian

Eesti keel

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Finnish

Suomi

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3.2.1

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French

Français

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Galician

Galego

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German

Deutsch

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3.2.1

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3.2.1

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3.2.0

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Greek

Ελληνικά

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Hebrew

עִבְרִית

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Hungarian

Magyar

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Irish

Gaeilge

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Italian

Italiano

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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

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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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3.0.1

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Macedonian

Македонски

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3.0.0

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Mongolian

Монгол

3.0.0

3.0.0

3.0.0







Norwegian (Bokmål)

Norsk (Bokmål)

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Norwegian (Nynorsk)

Norsk (Nynorsk)

3.2.0

3.2.0

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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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3.2.1

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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:

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



2LinuxWindowsMac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

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

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:

sudo port install swftools

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:


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fileToPdfpdfToSwffileToPdf中使用到JODConverterAPI,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();
}

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;
}


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.
}

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.
    }
}


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;
}

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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