DOCX2PDF
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将DOCX文档转化为PDF是项目中常见的需求之一,目前主流的方法可以分为两大类,一类是利用各种Office应用进行转换,譬如Microsoft Office、WPS以及LiberOffice,另一种是利用各种语言提供的对于Office文档读取的接口(譬如Apache POI)然后使用专门的PDFGenerator库,譬如IText进行PDF构建。总的来说,从样式上利用Office应用可以保证较好的样式,不过相对而言效率会比较低。其中Microsoft Office涉及版权,不可轻易使用(笔者所在公司就被抓包了),WPS目前使用比较广泛,不过存在超链接截断问题,即超过256个字符的超链接会被截断,LiberOffice的样式排版相对比较随意。而利用POI接口进行读取与生成的方式性能较好,适用于对于格式要求不是很高的情况。另外还有一些封装好的在线工具或者命令行工具,譬如docx2pdf与OfficeToPDF。
MicroSoft Office
本部分的核心代码如下,全部代码参考这里:
- private ActiveXComponent oleComponent = null;
- private Dispatch activeDoc = null;
- private final static String APP_ID = "Word.Application";
- // Constants that map onto Word's WdSaveOptions enumeration and that
- // may be passed to the close(int) method
- public static final int DO_NOT_SAVE_CHANGES = 0;
- public static final int PROMPT_TO_SAVE_CHANGES = -2;
- public static final int SAVE_CHANGES = -1;
- // These constant values determine whether or not tha application
- // instance will be displyed on the users screen or not.
- public static final boolean VISIBLE = true;
- public static final boolean HIDDEN = false;
- /**
- * Create a new instance of the JacobWordSearch class using the following
- * parameters.
- *
- * @param visibility A primitive boolean whose value will determine whether
- * or not the Word application will be visible to the user. Pass true
- * to display Word, false otherwise.
- */
- public OfficeConverter(boolean visibility) {
- this.oleComponent = new ActiveXComponent(OfficeConverter.APP_ID);
- this.oleComponent.setProperty("Visible", new Variant(visibility));
- }
- /**
- * Open ana existing Word document.
- *
- * @param docName An instance of the String class that encapsulates the
- * path to and name of a valid Word file. Note that there are a few
- * limitations applying to the format of this String; it must specify
- * the absolute path to the file and it must not use the single forward
- * slash to specify the path separator.
- */
- public void openDoc(String docName) {
- Dispatch disp = null;
- Variant var = null;
- // First get a Dispatch object referencing the Documents collection - for
- // collections, think of ArrayLists of objects.
- var = Dispatch.get(this.oleComponent, "Documents");
- disp = var.getDispatch();
- // Now call the Open method on the Documents collection Dispatch object
- // to both open the file and add it to the collection. It would be possible
- // to open a series of files and access each from the Documents collection
- // but for this example, it is simpler to store a reference to the
- // active document in a private instance variable.
- var = Dispatch.call(disp, "Open", docName);
- this.activeDoc = var.getDispatch();
- }
- /**
- * There is more than one way to convert the document into PDF format, you
- * can either explicitly use a FileConvertor object or call the
- * ExportAsFixedFormat method on the active document. This method opts for
- * the latter and calls the ExportAsFixedFormat method passing the name
- * of the file along with the integer value of 17. This value maps onto one
- * of Word's constants called wdExportFormatPDF and causes the application
- * to convert the file into PDF format. If you wanted to do so, for testing
- * purposes, you could add another value to the args array, a Boolean value
- * of true. This would open the newly converted document automatically.
- *
- * @param filename
- */
- public void publishAsPDF(String filename) {
- // The code to expoort as a PDF is 17
- //Object args = new Object{filename, new Integer(17), new Boolean(true)};
- Object args = new Object {
- filename, new Integer(17)
- } ;
- Dispatch.call(this.activeDoc, "ExportAsFixedFormat", args);
- }
- /**
- * Called to close the active document. Note that this method simply
- * calls the overloaded closeDoc(int) method passing the value 0 which
- * instructs Word to close the document and discard any changes that may
- * have been made since the document was opened or edited.
- */
- public void closeDoc() {
- this.closeDoc(JacobWordSearch.DO_NOT_SAVE_CHANGES);
- }
- /**
- * Called to close the active document. It is possible with this overloaded
- * version of the close() method to specify what should happen if the user
- * has made changes to the document that have not been saved. There are three
- * possible value defined by the following manifest constants;
- * DO_NOT_SAVE_CHANGES - Close the document and discard any changes
- * the user may have made.
- * PROMPT_TO_SAVE_CHANGES - Display a prompt to the user asking them
- * how to proceed.
- * SAVE_CHANGES - Save the changes the user has made to the document.
- *
- * @param saveOption A primitive integer whose value indicates how the close
- * operation should proceed if the user has made changes to the active
- * document. Note that no checks are made on the value passed to
- * this argument.
- */
- public void closeDoc(int saveOption) {
- Object args = {new Integer(saveOption)};
- Dispatch.call(this.activeDoc, "Close", args);
- }
- /**
- * Called once processing has completed in order to close down the instance
- * of Word.
- */
- public void quit() {
- Dispatch.call(this.oleComponent, "Quit");
- }
WPS
Java调用WPS或pdfcreator的com接口实现doc转pdf
本文的核心代码如下,完整代码查看这里:
- @Override
- public boolean convert(String word, String pdf) {
- File pdfFile = new File(pdf);
- File wordFile = new File(word);
- boolean convertSuccessfully = false;
- ActiveXComponent wps = null;
- ActiveXComponent doc = null;
- try {
- wps = new ActiveXComponent("KWPS.Application");
- // Dispatch docs = wps.getProperty("Documents").toDispatch();
- // Dispatch d = Dispatch.call(docs, "Open", wordFile.getAbsolutePath(), false, true).toDispatch();
- // Dispatch.call(d, "SaveAs", pdfFile.getAbsolutePath(), 17);
- // Dispatch.call(d, "Close", false);
- doc = wps.invokeGetComponent("Documents")
- .invokeGetComponent("Open", new Variant(wordFile.getAbsolutePath()));
- try {
- doc.invoke("SaveAs",
- new Variant(new File("C:\\Users\\lotuc\\Documents\\mmm.pdf").getAbsolutePath()),
- new Variant(17));
- convertSuccessfully = true;
- } catch (Exception e) {
- logger.warning("生成PDF失败");
- e.printStackTrace();
- }
- File saveAsFile = new File("C:\\Users\\lotuc\\Documents\\saveasfile.doc");
- try {
- doc.invoke("SaveAs", saveAsFile.getAbsolutePath());
- logger.info("成功另存为" + saveAsFile.getAbsolutePath());
- } catch (Exception e) {
- logger.info("另存为" + saveAsFile.getAbsolutePath() + "失败");
- e.printStackTrace();
- }
- } finally {
- if (doc == null) {
- logger.info("打开文件 " + wordFile.getAbsolutePath() + " 失败");
- } else {
- try {
- logger.info("释放文件 " + wordFile.getAbsolutePath());
- doc.invoke("Close");
- doc.safeRelease();
- } catch (Exception e1) {
- logger.info("释放文件 " + wordFile.getAbsolutePath() + " 失败");
- }
- }
- if (wps == null) {
- logger.info("加载 WPS 控件失败");
- } else {
- try {
- logger.info("释放 WPS 控件");
- wps.invoke("Quit");
- wps.safeRelease();
- } catch (Exception e1) {
- logger.info("释放 WPS 控件失败");
- }
- }
- }
- return convertSuccessfully;
- }
LiberOffice
Convert Microsoft Word to PDF - using Java and LibreOffice (UNO API)
LiberOffice本身提供了一个命令行工具进行转换,在你安装好了LiberOffice之后
- /usr/local/bin/soffice --convert-to pdf:writer_pdf_Export /Users/lotuc/Downloads/test.doc
如果有打开的libreoffice实例, 要穿入env选项指定一个工作目录
- /usr/local/bin/soffice "-env:UserInstallation=file:///tmp/LibreOffice_Conversion_abc" --convert-to pdf:writer_pdf_Export /Users/lotuc/Downloads/test.doc
首先我们需要安装好LiberOffice,然后将依赖的Jar包添加到classpath中:I
- Install Libre Office
- Create a Java project in your favorite editor and add these to your class path:
- [Libre Office Dir]/URE/java/juh.jar
- [Libre Office Dir]/URE/java/jurt.jar
- [Libre Office Dir]/URE/java/ridl.jar
- [Libre Office Dir]/program/classes/unoil.jar
然后我们需要启动一个LiberOffice进程:
- import java.util.Date;
- import java.io.File;
- import com.sun.star.beans.PropertyValue;
- import com.sun.star.comp.helper.Bootstrap;
- import com.sun.star.frame.XComponentLoader;
- import com.sun.star.frame.XDesktop;
- import com.sun.star.frame.XStorable;
- import com.sun.star.lang.XComponent;
- import com.sun.star.lang.XMultiComponentFactory;
- import com.sun.star.text.XTextDocument;
- import com.sun.star.uno.UnoRuntime;
- import com.sun.star.uno.XComponentContext;
- import com.sun.star.util.XReplaceDescriptor;
- import com.sun.star.util.XReplaceable;
- public class MailMergeExample {
- public static void main(String[] args) throws Exception {
- // Initialise
- XComponentContext xContext = Bootstrap.bootstrap();
- XMultiComponentFactory xMCF = xContext.getServiceManager();
- Object oDesktop = xMCF.createInstanceWithContext(
- "com.sun.star.frame.Desktop", xContext);
- XDesktop xDesktop = (XDesktop) UnoRuntime.queryInterface(
- XDesktop.class, oDesktop);
接下来我们需要加载目标Doc文档:
- // Load the Document
- String workingDir = "C:/projects/";
- String myTemplate = "letterTemplate.doc";
- if (!new File(workingDir + myTemplate).canRead()) {
- throw new RuntimeException("Cannot load template:" + new File(workingDir + myTemplate));
- }
- XComponentLoader xCompLoader = (XComponentLoader) UnoRuntime
- .queryInterface(com.sun.star.frame.XComponentLoader.class, xDesktop);
- String sUrl = "file:///" + workingDir + myTemplate;
- PropertyValue[] propertyValues = new PropertyValue[0];
- propertyValues = new PropertyValue[1];
- propertyValues[0] = new PropertyValue();
- propertyValues[0].Name = "Hidden";
- propertyValues[0].Value = new Boolean(true);
- XComponent xComp = xCompLoader.loadComponentFromURL(
- sUrl, "_blank", 0, propertyValues);
然后我们可以使用如下方式对内容进行替换:
- // Search and replace
- XReplaceDescriptor xReplaceDescr = null;
- XReplaceable xReplaceable = null;
- XTextDocument xTextDocument = (XTextDocument) UnoRuntime
- .queryInterface(XTextDocument.class, xComp);
- xReplaceable = (XReplaceable) UnoRuntime
- .queryInterface(XReplaceable.class, xTextDocument);
- xReplaceDescr = (XReplaceDescriptor) xReplaceable
- .createReplaceDescriptor();
- // mail merge the date
- xReplaceDescr.setSearchString("
"); - xReplaceDescr.setReplaceString(new Date().toString());
- xReplaceable.replaceAll(xReplaceDescr);
- // mail merge the addressee
- xReplaceDescr.setSearchString("
"); - xReplaceDescr.setReplaceString("Best Friend");
- xReplaceable.replaceAll(xReplaceDescr);
- // mail merge the signatory
- xReplaceDescr.setSearchString("
"); - xReplaceDescr.setReplaceString("Your New Boss");
- xReplaceable.replaceAll(xReplaceDescr);
然后可以输出到PDF中:
- // save as a PDF
- XStorable xStorable = (XStorable) UnoRuntime
- .queryInterface(XStorable.class, xComp);
- propertyValues = new PropertyValue[2];
- propertyValues[0] = new PropertyValue();
- propertyValues[0].Name = "Overwrite";
- propertyValues[0].Value = new Boolean(true);
- propertyValues[1] = new PropertyValue();
- propertyValues[1].Name = "FilterName";
- propertyValues[1].Value = "writer_pdf_Export";
- // Appending the favoured extension to the origin document name
- String myResult = workingDir + "letterOutput.pdf";
- xStorable.storeToURL("file:///" + myResult, propertyValues);
- System.out.println("Saved " + myResult);
xdocreport
本文的核心代码如下,完整代码查看这里:
- /**
- * @param inpuFile 输入的文件流
- * @param outFile 输出的文件对象
- * @return
- * @function 利用Apache POI从输入的文件中生成PDF文件
- */
- @SneakyThrows
- public static void convertWithPOI(InputStream inpuFile, File outFile) {
- //从输入的文件流创建对象
- XWPFDocument document = new XWPFDocument(inpuFile);
- //创建PDF选项
- PdfOptions pdfOptions = PdfOptions.create();//.fontEncoding("windows-1250")
- //为输出文件创建目录
- outFile.getParentFile().mkdirs();
- //执行PDF转化
- PdfConverter.getInstance().convert(document, new FileOutputStream(outFile), pdfOptions);
- }
- /**
- * @param inpuFile
- * @param outFile
- * @param renderParams
- * @function 先将渲染参数填入模板DOCX文件然后生成PDF
- */
- @SneakyThrows
- public static void convertFromTemplateWithFreemarker(InputStream inpuFile, File outFile, Map
renderParams) { - //创建Report实例
- IXDocReport report = XDocReportRegistry.getRegistry().loadReport(
- inpuFile, TemplateEngineKind.Freemarker);
- //创建上下文
- IContext context = report.createContext();
- //填入渲染参数
- renderParams.forEach((s, o) -> {
- context.put(s, o);
- });
- //创建输出流
- outFile.getParentFile().mkdirs();
- //创建转化参数
- Options options = Options.getTo(ConverterTypeTo.PDF).via(
- ConverterTypeVia.XWPF);
- //执行转化过程
- report.convert(context, options, new FileOutputStream(outFile));
- }
网站题目:Java中常用的几种DOCX转PDF方法
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