使用apache poi将HSSF（excel）embedded到HSLF（ppt）中

我想embedded到使用Apache poi的演示文稿（PPT）的Excel表。 我们应该怎么做？ 如果有人知道，请帮助我。

Answer 1

我花了一段时间才弄清楚这些零件是如何组装在一起的。

embedded可以通过两种方式完成：

• 通过更新已经embedded的工作表
  • 临：只要调用ObjectData.get/setData() ，你就完成了
  • Con：如果你想embedded多个OLE对象呢？
• 或者你可以从头开始embedded元素（见下面）

像往常一样，当我试图弄清楚，如何实现某些POIfunction，我将结果与Libre Office文件进行比较，在这种情况下，必须创build/修改几个部分：

• 在Powerpoint对象中…
  • embedded对象的二进制数据被存储为根级logging。 大多数根logging都是位置相关的 ，所以当创build新logging（例如幻灯片）时，您需要重新计算所有偏移量
  • 通过将loggingembeddedDocumentlogging中来引用二进制数据logging
  • …并将其混淆一点，这个文档引用再次被实际的形状对象引用
• 在embedded式工作表的POIFS中…
  • Ole Stream条目需要被创build
  • 并且根节点必须具有embedded文档types的class-id
  • 除此之外，embedded式工作簿对象和数据本身没有变化，是一个自包含的excel文件

此外，我使用了两个实用的信息类： BiffViewer和POIFSLister 。

由于这只是一个概念的certificate，它远远不是完整的。 要进一步修改embedded式元素的表示forms，您需要查阅规范 。

为embedded对象创build预览图像还有一个未解决的问题。 您可能希望使用中性图像，无论如何，只要用户激活（双击）的ole对象…一个替代将使用jodconverter ，但比POI方法将有点没有意义.. 。

（使用POI3.9 / Libre Office 4.0 / MS Excel Viewer / MS Office 2003进行testing）

 import java.awt.geom.Rectangle2D; import java.io.*; import java.lang.reflect.Field; import org.apache.poi.POIDocument; import org.apache.poi.ddf.*; import org.apache.poi.hpsf.ClassID; import org.apache.poi.hslf.HSLFSlideShow; import org.apache.poi.hslf.exceptions.HSLFException; import org.apache.poi.hslf.model.*; import org.apache.poi.hslf.model.Picture; import org.apache.poi.hslf.model.Slide; import org.apache.poi.hslf.record.*; import org.apache.poi.hslf.usermodel.*; import org.apache.poi.hssf.usermodel.*; import org.apache.poi.hwpf.HWPFDocument; import org.apache.poi.hwpf.usermodel.*; import org.apache.poi.poifs.filesystem.*; import org.apache.poi.util.*; public class PoiOleXlsInPpt { static final OleType EXCEL97 = new OleType("{00020820-0000-0000-C000-000000000046}"); static final OleType EXCEL95 = new OleType("{00020810-0000-0000-C000-000000000046}"); static final OleType WORD97 = new OleType("{00020906-0000-0000-C000-000000000046}"); static final OleType WORD95 = new OleType("{00020900-0000-0000-C000-000000000046}"); static final OleType POWERPOINT97 = new OleType("{64818D10-4F9B-11CF-86EA-00AA00B929E8}"); static final OleType POWERPOINT95 = new OleType("{EA7BAE70-FB3B-11CD-A903-00AA00510EA3}"); static class OleType { final String classId; OleType(String classId) { this.classId = classId; } ClassID getClassID() { ClassID cls = new ClassID(); byte clsBytes[] = cls.getBytes(); String clsStr = classId.replaceAll("[{}-]", ""); for (int i=0; i<clsStr.length(); i+=2) { clsBytes[i/2] = (byte)Integer.parseInt(clsStr.substring(i, i+2), 16); } return cls; } } public static void main(String[] args) throws Exception { HSLFSlideShow _hslfSlideShow = HSLFSlideShow.create(); SlideShow ppt = new SlideShow(_hslfSlideShow); OLEShape oleShape1 = createOLEShape(getSampleWorkbook1(), ppt, _hslfSlideShow, EXCEL97); oleShape1.setAnchor(new Rectangle2D.Double(100,100,100,100)); OLEShape oleShape2 = createOLEShape(getSampleWorkbook2(), ppt, _hslfSlideShow, EXCEL97); oleShape2.setAnchor(new Rectangle2D.Double(300,300,100,100)); OLEShape oleShape3 = createOLEShape(getSampleDocument(), ppt, _hslfSlideShow, WORD97); oleShape3.setAnchor(new Rectangle2D.Double(300,100,100,100)); // create and link visuals to the ole data Slide slide = ppt.createSlide(); slide.addShape(oleShape1); slide.addShape(oleShape2); slide.addShape(oleShape3); FileOutputStream fos = new FileOutputStream("ole_xls_in_ppt_out2.ppt"); ppt.write(fos); fos.close(); } static OLEShape createOLEShape( POIDocument sample , SlideShow ppt , HSLFSlideShow _hslfSlideShow , OleType oleType ) throws IOException { // generate a preview image int prevIdx = generatePreview(ppt, sample); // add the data to the SlideShow ExEmbed eeEmbed = addOleDataToDocumentRecord(ppt); ExOleObjStg exOleObjStg = addOleDataToRootRecords(_hslfSlideShow, sample, oleType); eeEmbed.getExOleObjAtom().setObjStgDataRef(exOleObjStg.getPersistId()); OLEShape oleShape = new OLEShape(prevIdx); linkOleDataToShape(oleShape, eeEmbed); return oleShape; } static POIDocument getSampleWorkbook1() { HSSFWorkbook wb = new HSSFWorkbook(); HSSFSheet sheet = wb.createSheet(); sheet.createRow(1).createCell(1).setCellValue("First Workbook"); return wb; } static POIDocument getSampleWorkbook2() { HSSFWorkbook wb = new HSSFWorkbook(); HSSFSheet sheet = wb.createSheet(); sheet.createRow(1).createCell(1).setCellValue("Second Workbook"); return wb; } // the sample document has apparently a problem, // ie word inside ms powerpoint crashed, and libre office doesn't display the text // it was just a test, if embedding elements != Excel works // in case HWPF is interesting to you, you probably know anyway, where the error below is ... static POIDocument getSampleDocument() throws IOException { FileInputStream fis = new FileInputStream("src/test/resources/empty.doc"); HWPFDocument doc = new HWPFDocument(fis); fis.close(); Range range = doc.getRange(); CharacterRun run1 = range.insertAfter("Sample text"); run1.setFontSize(11); return doc; } /** * Generates a modified version of the sample element, which * contains embedding informations */ static byte[] wrapOleData(POIDocument oleData, OleType oleType) { try { ByteArrayOutputStream bos = new ByteArrayOutputStream(); oleData.write(bos); ByteArrayInputStream bis = new ByteArrayInputStream(bos.toByteArray()); bos.reset(); POIFSFileSystem poifs = new POIFSFileSystem(bis); final String OLESTREAM_NAME = "\u0001Ole"; DirectoryNode root = poifs.getRoot(); if (!root.hasEntry(OLESTREAM_NAME)) { // the following data was taken from an example libre office document // beside this "\u0001Ole" record there were several other records, eg CompObj, // OlePresXXX, but it seems, that they aren't neccessary byte oleBytes[] = { 1, 0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 }; poifs.createDocument(new ByteArrayInputStream(oleBytes), OLESTREAM_NAME); } // need to set storage clsid, otherwise embedded object is not recognized root.setStorageClsid(oleType.getClassID()); poifs.writeFilesystem(bos); return bos.toByteArray(); } catch (IOException e) { throw new RuntimeException("wth?!", e); } } /** * to be defined, how to create a preview image * for a start, I've taken just a dummy image, which will be * replaced, when the user activates the ole object * * not really an alternativ: * http://stackoverflow.com/questions/16704624/how-to-print-a-workbook-file-made-using-apache-poi-and-java * * @return image index of the preview image */ static int generatePreview(SlideShow ppt, POIDocument oleData) { try { FileInputStream fis = new FileInputStream("src/test/resources/dilbert-2011-09-28-powerpoint.jpg"); byte previewImg[] = IOUtils.toByteArray(fis); fis.close(); return ppt.addPicture(previewImg, Picture.JPEG); } catch (IOException e) { throw new RuntimeException("not really?", e); } } static ExEmbed addOleDataToDocumentRecord(SlideShow ppt) { // taken from SlideShow.addControl() Document _documentRecord = ppt.getDocumentRecord(); ExObjList lst = _documentRecord.getExObjList(); if (lst == null) { lst = new ExObjList(); _documentRecord.addChildAfter(lst, _documentRecord.getDocumentAtom()); try { Field f = Document.class.getDeclaredField("exObjList"); f.setAccessible(true); f.set(_documentRecord, lst); } catch (Exception e) { throw new RuntimeException("not here", e); } } ExObjListAtom objAtom = lst.getExObjListAtom(); // increment the object ID seed int objectId = (int) objAtom.getObjectIDSeed() + 1; objAtom.setObjectIDSeed(objectId); ExEmbed exEmbed = new ExEmbed(); // remove unneccessary infos, so we don't need to specify the type // of the ole object multiple times Record children[] = exEmbed.getChildRecords(); exEmbed.removeChild(children[2]); exEmbed.removeChild(children[3]); exEmbed.removeChild(children[4]); ExEmbedAtom eeEmbed = exEmbed.getExEmbedAtom(); try { Field f = ExEmbedAtom.class.getDeclaredField("_data"); f.setAccessible(true); f.set(eeEmbed, new byte[]{0,0,0,0,1/*CantLockServerB*/,0,0,0}); // oops, there seems to be an error in the default constructor ... // should be 8 and not 7 bytes setRecordLength(eeEmbed, 8); } catch (Exception e) { throw new RuntimeException("trust me ;)", e); } ExOleObjAtom eeAtom = exEmbed.getExOleObjAtom(); eeAtom.setObjID(objectId); eeAtom.setDrawAspect(ExOleObjAtom.DRAW_ASPECT_VISIBLE); eeAtom.setType(ExOleObjAtom.TYPE_EMBEDDED); // eeAtom.setSubType(ExOleObjAtom.SUBTYPE_EXCEL); // should be ignored?!?, see MS-PPT ExOleObjAtom, but Libre Office sets it ... eeAtom.setOptions(1226240); lst.addChildAfter(exEmbed, objAtom); return exEmbed; } static ExOleObjStg addOleDataToRootRecords( HSLFSlideShow _hslfSlideShow , POIDocument oleData , OleType oleType ) throws IOException { ExOleObjStg exOleObjStg = new ExOleObjStg(); int slideRecordPos = _hslfSlideShow.appendRootLevelRecord(exOleObjStg); exOleObjStg.setPersistId(slideRecordPos); exOleObjStg.setData(wrapOleData(oleData, oleType)); // taken from SlideShow.createSlide Record _records[] = _hslfSlideShow.getRecords(); // Add the new OLE record into the PersistPtr stuff int offset = 0; int slideOffset = 0; PersistPtrHolder ptr = null; UserEditAtom usr = null; for (int i = 0; i < _records.length; i++) { Record record = _records[i]; ByteArrayOutputStream out = new ByteArrayOutputStream(); try { record.writeOut(out); } catch (IOException e) { throw new HSLFException(e); } // Grab interesting records as they come past if (_records[i].getRecordType() == RecordTypes.PersistPtrIncrementalBlock.typeID) { ptr = (PersistPtrHolder) _records[i]; } if (_records[i].getRecordType() == RecordTypes.UserEditAtom.typeID) { usr = (UserEditAtom) _records[i]; } if (i == slideRecordPos) { slideOffset = offset; } offset += out.size(); } // the ole objects needs to know its position within // the root records, because it will be later accessed // via its index from the shape int psrId = usr.getMaxPersistWritten() + 1; exOleObjStg.setPersistId(psrId); // Last view is now of the slide usr.setLastViewType((short) UserEditAtom.LAST_VIEW_SLIDE_VIEW); usr.setMaxPersistWritten(psrId); // increment the number of persit objects // Add the new slide into the last PersistPtr // (Also need to tell it where it is) exOleObjStg.setLastOnDiskOffset(slideOffset); ptr.addSlideLookup(psrId, slideOffset); return exOleObjStg; } static void linkOleDataToShape(OLEShape oleShape, ExEmbed exEmbed) { oleShape.setEscherProperty(EscherProperties.BLIP__PICTUREID, exEmbed.getExOleObjAtom().getObjID()); EscherSpRecord spRecord = oleShape.getSpContainer().getChildById(EscherSpRecord.RECORD_ID); spRecord.setFlags(spRecord.getFlags()|EscherSpRecord.FLAG_OLESHAPE); // ExObjRefAtom is not set in OLEShape UnknownEscherRecord uer = new UnknownEscherRecord(); byte uerData[] = new byte[12]; LittleEndian.putShort( uerData, 0, (short)0 ); // options = 0 LittleEndian.putShort( uerData, 2, (short)RecordTypes.ExObjRefAtom.typeID); // recordId LittleEndian.putInt( uerData, 4, 4 ); // remaining bytes LittleEndian.putInt( uerData, 8, exEmbed.getExOleObjAtom().getObjID() ); // the data uer.fillFields(uerData, 0, null); EscherContainerRecord uerCont = new EscherContainerRecord(); uerCont.setRecordId((short)RecordTypes.EscherClientData); uerCont.setVersion((short)0x000F); // yes, we are still a container ... uerCont.addChildRecord(uer); oleShape.getSpContainer().addChildRecord(uerCont); } static void setRecordLength(Record record, int len) throws NoSuchFieldException, IllegalAccessException { Field f = record.getClass().getDeclaredField("_header"); f.setAccessible(true); byte _header[] = (byte[])f.get(record); LittleEndian.putInt(_header, 4, len); f.set(record, _header); } }