前段时间做项目时，需要将word文档在浏览器中打开，一般的在浏览器中打开word都是直接提示下载的，找了好久都是些pageoffice等的收费插件，小项目成本要尽量压缩，所以就放弃了这种收费的插件了。突然想到有些浏览器能直接打开pdf或者图片，手机端也需要显示图片，所以可以将word转成pdf和图片，那java中怎么将word转成pdf或者图片呢？也研究了一下，有的说用poi等，但是研究了一下，发现不好用，另一种办法是office中的转换jar包：jacob，通过他可以调用office中的文件转换功能：比如说将word转成pdf或图片，excel转成pdf或图片，ppt转成pdf或图片等等，所以就用了这种办法，下面说一下具体的操作过程，在开始前首先需要准备一些材料：jacob和office，我这里用的是jacob1.11.1和office，具体过程如下：
1.先安装一下office；
2.解压下载的jacob1.11.1，将里面的jacob.jar导入项目中，buildPath，如果是win732位系统，找到x86文件夹中的jacob.dll，拷贝到c盘windows的system32目录下（64位系统找到AMD64文件夹中的jacob.dll，同样拷贝到system32目录下）；
下面就开始在项目中写代码完成转换了。
public class JacobUtil {public static final String DOC = "doc";public static final String DOCX = "docx";public static final String PDF = "pdf";public static final String XLS = "xls";public static final String XLSX = "xlsx";public static final String MP4 = "mp4";public static final String PPT = "ppt";public static final String PPTX = "pptx";// 8 代表word保存成html public static final int WORD2HTML = 8; // 17代表word保存成pdfpublic static final int WD2PDF = 17;public static final int PPT2PDF = 32;public static final int XLS2PDF = 0;public static void main(String[] args) { String pptfile = "C:/Users/Administrator/Desktop/ceshi.pptx"; String pdffile = "C:/Users/Administrator/Desktop/数字模拟电路.pdf"; ppt2pdf(pptfile,pdffile); pdf2Image(pdffile);} /*** @author shenjianhu: * @version 创建时间：4月8日 下午9:07:33* @param resourceType 资源类型* @param path 资源路径* @return* TODO 文件转换*/public static Integer formatConvert(String resourceType, String resourcePath) {Integer pages = 0;String resource = resourcePath.substring(0, resourcePath.lastIndexOf("."));if(resourceType.equalsIgnoreCase(DOC)||resourceType.equalsIgnoreCase(DOCX)){//word转成pdf和图片word2pdf(resourcePath, resource+".pdf");pages = pdf2Image(resource+".pdf");}else if(resourceType.equalsIgnoreCase(PDF)){//pdf转成图片pages = pdf2Image(resourcePath);}else if(resourceType.equalsIgnoreCase(XLS)||resourceType.equalsIgnoreCase(XLSX)){//excel文件转成图片excel2pdf(resourcePath, resource+".pdf");pages = pdf2Image(resource+".pdf");}else if(resourceType.equalsIgnoreCase(PPT)||resourceType.equalsIgnoreCase(PPTX)){//ppt2pdf(resourcePath, resource+".pdf");//pages = pdf2Image(resource+".pdf");pages = ppt2Image(resourcePath, resource+".jpg");}else if(resourceType.equalsIgnoreCase(MP4)){//视频文件不转换pages = 0;}return pages;}/*** @author shenjianhu: * @version 创建时间：4月18日 下午3:08:11* @param pptfile* @param imgfile* TODO ppt转换成图片*/public static Integer ppt2Image(String pptfile,String imgfile){String imageDir = pptfile.substring(0, pptfile.lastIndexOf("."));File dir = new File(imageDir);if(!dir.exists()){dir.mkdirs();}int length = 0;ActiveXComponent app = null;try{ComThread.InitSTA();app = new ActiveXComponent("PowerPoint.Application"); System.out.println("准备打开ppt文档");app.setProperty("Visible", true);Dispatch ppts = app.getProperty("Presentations").toDispatch();Dispatch ppt = Dispatch.call(ppts, "Open", pptfile, true, true, true).toDispatch();System.out.println("-----------------ppt开始转换图片---------------");Dispatch.call(ppt, "SaveCopyAs", imgfile, 17);System.out.println("-----------------ppt转换图片结束---------------");Dispatch.call(ppt, "Close");System.out.println("关闭ppt文档");}catch(Exception e){ComThread.Release();e.printStackTrace();}finally{String files[];files = dir.list();length = files.length;System.out.println(length);app.invoke("Quit");ComThread.Release();}return length;}/** * WORD转HTML * @param docfile WORD文件全路�? * @param htmlfile 转换后HTML存放路径 */public static void wordToHtml(String docfile, String htmlfile){// 启动word应用程序(Microsoft Office Word ) ActiveXComponent app = null; System.out.println("*****正在转换...*****"); try { ComThread.InitSTA();app = new ActiveXComponent("Word.Application");// 设置word应用程序不可�? app.setProperty("Visible", new Variant(false)); // documents表示word程序的所有文档窗口，（word是多文档应用程序�? Dispatch docs = app.getProperty("Documents").toDispatch(); // 打开要转换的word文件 Dispatch doc = Dispatch.invoke(docs,"Open",Dispatch.Method,new Object[] { docfile, new Variant(false), new Variant(true) }, new int[1]).toDispatch();// 作为html格式保存到临时文�? Dispatch.invoke(doc, "SaveAs", Dispatch.Method, new Object[] {htmlfile, new Variant(WORD2HTML) }, new int[1]);// 关闭word文件 Dispatch.call(doc, "Close", new Variant(false));}catch (Exception e){ComThread.Release();e.printStackTrace();}finally {//关闭word应用程序 app.invoke("Quit", new Variant[] {}); ComThread.Release();} System.out.println("*****转换完毕********"); } public static void word2pdf(String docfile, String pdffile){// 启动word应用程序(Microsoft Office Word ) ActiveXComponent app = null; try{ComThread.InitSTA();app = new ActiveXComponent("Word.Application");app.setProperty("Visible", false);System.out.println("*****正在转换...*****"); // 设置word应用程序不可见// app.setProperty("Visible", new Variant(false)); // documents表示word程序的所有文档窗口，（word是多文档应用程序�? Dispatch docs = app.getProperty("Documents").toDispatch(); // 打开要转换的word文件 /* Dispatch doc = Dispatch.invoke(docs,"Open",Dispatch.Method,new Object[] { docfile, new Variant(false), new Variant(true) }, new int[1]).toDispatch(); */Dispatch doc = Dispatch.call(docs,"Open",docfile,false,true).toDispatch();// 调用Document对象的saveAs方法,将文档保存为pdf格式/*Dispatch.invoke(doc, "ExportAsFixedFormat", Dispatch.Method, new Object[] {pdffile, new Variant(wdFormatPDF) }, new int[1]);*/ Dispatch.call(doc, "ExportAsFixedFormat", pdffile, WD2PDF); // 关闭word文件 Dispatch.call(doc, "Close", false); }catch (Exception e){ ComThread.Release(); e.printStackTrace(); }finally {//关闭word应用程序 app.invoke("Quit", 0); ComThread.Release();} System.out.println("*****转换完毕********"); }/*** @author shenjianhu: * @version 创建时间：11月16日 下午8:21:29* @param pdffile* TODO pdf文件按页转成图片*/public static int pdf2Image(String pdffile){File file = new File(pdffile);int pages = 0;try {ComThread.InitSTA();RandomAccessFile raf = new RandomAccessFile(file, "r");FileChannel channel = raf.getChannel();java.nio.ByteBuffer buf = channel.map(FileChannel.MapMode.READ_ONLY, 0, channel.size());PDFFile pdf = new PDFFile(buf);pages = pdf.getNumPages();System.out.println("页数："+pdf.getNumPages());File direct = new File(pdffile.substring(0, pdffile.lastIndexOf(".")));if(!direct.exists()){direct.mkdir();}for(int i=1;i<=pdf.getNumPages();i++){PDFPage page = pdf.getPage(i);Rectangle rect = new Rectangle(0, 0, (int)(page.getBBox().getWidth()), (int)(page.getBBox().getHeight()));int width = (int) (rect.getWidth()*2);int height = (int) (rect.getHeight()*2);Image image = page.getImage(width, height, rect, null, true, true);BufferedImage tag = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);tag.getGraphics().drawImage(image, 0, 0, width, height, null);FileOutputStream out = new FileOutputStream(direct+"/幻灯片"+i+".JPG");JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(tag);param.setQuality(1f, false);encoder.setJPEGEncodeParam(param);encoder.encode(tag);out.close();System.out.println("image in the page -->"+i);}buf.clear();channel.close();raf.close();unmap(buf);} catch (Exception e) {ComThread.Release();e.printStackTrace();} finally{ComThread.Release();}return pages;}/*** @author shenjianhu: * @version 创建时间：12月19日 上午11:25:22* @param buffer* TODO pdf转成图片时解除映射，以便后面删除文件时能够删除pdf文件*/public static <T> void unmap(final Object buffer){AccessController.doPrivileged(new PrivilegedAction<T>() {@Overridepublic T run() {try{Method getCleanerMethod = buffer.getClass().getMethod("cleaner", new Class[0]);getCleanerMethod.setAccessible(true);Cleaner cleaner = (Cleaner) getCleanerMethod.invoke(buffer, new Object[0]);cleaner.clean();}catch(Exception e){e.printStackTrace();}return null;}});}public static void ppt2pdf(String pptfile,String pdffile){Log.debug("打开ppt应用");ActiveXComponent app = null;Log.debug("设置可见性");//app.setProperty("Visible", new Variant(false));Log.debug("打开ppt文件");try {ComThread.InitSTA();app = new ActiveXComponent("PowerPoint.Application");Dispatch files = app.getProperty("Presentations").toDispatch();Dispatch file = Dispatch.call(files, "open", pptfile, false, true).toDispatch();Log.debug("保存为图片");Dispatch.call(file, "SaveAs", pdffile, PPT2PDF);Log.debug("关闭文档");Dispatch.call(file,"Close");} catch (Exception e) {ComThread.Release();e.printStackTrace();Log.error("ppt to images error",e);//throw e;}finally{Log.debug("关闭应用");app.invoke("Quit");ComThread.Release();}}public static void excel2pdf(String excelfile,String pdffile){ActiveXComponent app = null;try{ComThread.InitSTA(true);app = new ActiveXComponent("Excel.Application");app.setProperty("Visible", false);app.setProperty("AutomationSecurity", new Variant(3));//禁用宏Dispatch excels = app.getProperty("Workbooks").toDispatch();/*Dispatch excel = Dispatch.invoke(excels, "Open", Dispatch.Method, new Object[]{excelfile,new Variant(false),new Variant(false),},new int[9]).toDispatch();*/Dispatch excel = Dispatch.call(excels, "Open", excelfile,false,true).toDispatch();//转换格式ExportAsFixedFormat/*Dispatch.invoke(excel, "ExportAsFixedFormat", Dispatch.Method, new Object[]{new Variant(0),//pdf格式=0pdffile,new Variant(0)//0=标准(生成的pdf图片不会变模糊) 1=最小文件(生成的pdf图片模糊的一塌糊涂)}, new int[1]);*/Dispatch.call(excel, "ExportAsFixedFormat",XLS2PDF,pdffile);Dispatch.call(excel, "Close", false);if(app!=null){app.invoke("Quit");app=null;}}catch(Exception e){ComThread.Release();e.printStackTrace();}finally{ComThread.Release();}}public static void ppt2html(String pptfile,String htmlfile){ActiveXComponent app = null;try{ComThread.InitSTA(true);app = new ActiveXComponent("PowerPoint.Application");//app.setProperty("Visible", false);app.setProperty("AutomationSecurity", new Variant(3));//禁用宏Dispatch dispatch = app.getProperty("Presentations").toDispatch();Dispatch dispatch1 = Dispatch.call(dispatch, "Open", pptfile,false,true).toDispatch();Dispatch.call(dispatch1, "SaveAs",htmlfile,new Variant(12));Dispatch.call(dispatch1, "Close", false);if(app!=null){app.invoke("Quit");app=null;}}catch(Exception e){ComThread.Release();e.printStackTrace();}finally{ComThread.Release();}}}
写好代码后，根据自己的需要调用相应的方法就行了。需要注意的是：文件路径中最好不好出现空格，出现空格可能jacob程序访问不到资源报错。
