使用Apache POI将文件embedded到Excel中的XSSF表单中
我发现kiwiwings 回答了如何使用Apache POI将文件embedded到Excel中的问题，但不幸的是，他的回答只包含HSSF电子表格（XLS格式），而我们正在使用新的XSSF格式（XLSX），而解决scheme提出HSSF电子表格将无法正常工作。 我尝试移植它，但棺材中的最后一颗钉子来自XSSF世界中没有HSSFObjectData等价物的事实。
这就是我迄今为止所做的 – 我已经find了一种将文件附加到Excel文件的方法。 这段代码是这样做的：
private PackagePart packageNotebook( final OPCPackage pkg, final String notebookTable, final String taskId, final String notebookName, final byte[] contents ) throws InvalidFormatException, IOException { final PackagePartName partName = PackagingURIHelper.createPartName( "/notebook/" + notebookTable + "/" + taskId + "/" + notebookName ); pkg.addRelationship( partName, TargetMode.INTERNAL, PackageRelationshipTypes.CUSTOM_XML ); final PackagePart part = pkg.createPart( partName, "text/xml" ); IOUtils.write( contents, part.getOutputStream() ); return part; } 我也能够创build我想用作Excel文件中的锚点的图像。 然而，我无能为力的是将这个形象与embedded的内容“联系起来”，正如奇维威斯在他的回答中能够做到的那样。
我的最终目标是创build一个包含embedded对象的XLSX Excel文件，这样用户就可以双击单元格中打开的锚点，然后就可以编辑该文件，就像您将要做的一样使用Excel客户端embedded文件。
有没有人有一个如何做到这一点工作的例子？
与HSSF / Package Manager相比，这更简单。 🙂
所以像往常一样，我已经开始通过Excel 2016创build必要的文件，并检查了xml中的内容。 办公室喜欢把很多的AlternateContent标签 – 在下面的解决scheme，我已经删除了这些包装，并直接提供了原来的“select”元素内的元素，至less在Excel2016的作品… – 请注意，embeddedExcel2016的原始文件无法在Libre Office 5 / Excel-Viewer中打开，因此您的用户需要正常安装。
正如我在POI的完整开发人员代码库中实现它，您可能需要使用完整的模式 。
当用户尝试打开embedded的对象时，预览图片将被replace。 这将是很好，如果POIs WMF包可以用来生成预览图像，但我只实现它们只读到现在:(
如果embedded式元素无法打开，请给我一行用户的Office安装，并尝试相应降级。
package org.apache.poi.xssf; import java.awt.geom.Rectangle2D; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.HashSet; import java.util.Set; import javax.xml.namespace.QName; import org.apache.poi.POIXMLDocument; import org.apache.poi.hpsf.ClassID; import org.apache.poi.openxml4j.exceptions.InvalidFormatException; import org.apache.poi.openxml4j.opc.PackagePart; import org.apache.poi.openxml4j.opc.PackagePartName; import org.apache.poi.openxml4j.opc.PackageRelationship; import org.apache.poi.openxml4j.opc.PackageRelationshipTypes; import org.apache.poi.openxml4j.opc.PackagingURIHelper; import org.apache.poi.openxml4j.opc.TargetMode; import org.apache.poi.poifs.filesystem.Ole10Native; import org.apache.poi.poifs.filesystem.Ole10NativeException; import org.apache.poi.poifs.filesystem.POIFSFileSystem; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.xslf.usermodel.XMLSlideShow; import org.apache.poi.xslf.usermodel.XSLFTextBox; import org.apache.poi.xssf.usermodel.XSSFClientAnchor; import org.apache.poi.xssf.usermodel.XSSFDrawing; import org.apache.poi.xssf.usermodel.XSSFPicture; import org.apache.poi.xssf.usermodel.XSSFRelation; import org.apache.poi.xssf.usermodel.XSSFSheet; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.apache.xmlbeans.XmlCursor; import org.apache.xmlbeans.XmlException; import org.apache.xmlbeans.XmlObject; import org.junit.Test; import org.openxmlformats.schemas.drawingml.x2006.main.CTOfficeArtExtension; import org.openxmlformats.schemas.drawingml.x2006.main.CTOfficeArtExtensionList; import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTPicture; import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTTwoCellAnchor; import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTOleObject; import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTOleObjects; import org.openxmlformats.schemas.spreadsheetml.x2006.main.CTWorksheet; public class TestEmbed { static final String drawNS = "http://schemas.microsoft.com/office/drawing/2010/main"; static final String relationshipsNS = "http://schemas.openxmlformats.org/officeDocument/2006/relationships"; // write some embedded objects to sheet @Test public void write() throws IOException, InvalidFormatException { XSSFWorkbook wb = new XSSFWorkbook(); XSSFSheet sh = wb.createSheet(); int imgPptId = addImageToWorkbook(wb, "ppt-icon.jpg", Workbook.PICTURE_TYPE_JPEG); int imgPckId = addImageToWorkbook(wb, "PackageIcon.png", Workbook.PICTURE_TYPE_PNG); String imgPckRelId = addImageToSheet(sh, imgPckId, Workbook.PICTURE_TYPE_PNG); String imgPptRelId = addImageToSheet(sh, imgPptId, Workbook.PICTURE_TYPE_JPEG); // embed two different HTML pages via package manager XSSFClientAnchor imgAnchor1 = new XSSFClientAnchor(0, 0, 0, 0, 1, 1, 3, 3); String oleRelId1 = addHtml(sh, 1); int shapeId1 = addImageToShape(sh, imgAnchor1, imgPckId); addObjectToShape(sh, imgAnchor1, shapeId1, oleRelId1, imgPckRelId, "Objekt-Manager-Shellobjekt"); XSSFClientAnchor imgAnchor2 = new XSSFClientAnchor(0, 0, 0, 0, 5, 1, 7, 3); String oleRelId2 = addHtml(sh, 2); int shapeId2 = addImageToShape(sh, imgAnchor2, imgPckId); addObjectToShape(sh, imgAnchor2, shapeId2, oleRelId2, imgPckRelId, "Objekt-Manager-Shellobjekt"); // embed a slideshow (no package manager needed) XSSFClientAnchor imgAnchor3 = new XSSFClientAnchor(0, 0, 0, 0, 1, 5, 7, 10); String oleRelId3 = addSlideShow(sh, 1); int shapeId3 = addImageToShape(sh, imgAnchor3, imgPptId); addObjectToShape(sh, imgAnchor3, shapeId3, oleRelId3, imgPptRelId, "Presentation"); FileOutputStream fos = new FileOutputStream("bla.xlsx"); wb.write(fos); fos.close(); wb.close(); } // read Ole10Native objects from workbook @Test public void read() throws IOException, XmlException, Ole10NativeException { XSSFWorkbook wb = new XSSFWorkbook(new FileInputStream("bla.xlsx")); XSSFSheet sheet = wb.getSheetAt(0); CTWorksheet cws = sheet.getCTWorksheet(); if (!cws.isSetOleObjects()) { System.out.println("sheet has no ole objects"); } else { Set<Integer> processedShapes = new HashSet<Integer>(); for (XmlObject xOleObj : cws.getOleObjects().selectPath("declare namespace p='"+XSSFRelation.NS_SPREADSHEETML+"' .//p:oleObject")) { XmlCursor cur = xOleObj.newCursor(); String shapeId = cur.getAttributeText(new QName("shapeId")); String relId = cur.getAttributeText(new QName(relationshipsNS, "id")); cur.dispose(); if (processedShapes.contains(Integer.valueOf(shapeId))) { continue; } processedShapes.add(Integer.valueOf(shapeId)); PackagePart pp = sheet.getRelationById(relId).getPackagePart(); if ("application/vnd.openxmlformats-officedocument.oleObject".equals(pp.getContentType())) { InputStream is = pp.getInputStream(); POIFSFileSystem poifs = new POIFSFileSystem(is); is.close(); Ole10Native ole10 = Ole10Native.createFromEmbeddedOleObject(poifs); poifs.close(); System.out.println("Filename: "+ole10.getFileName()+" - content length: "+ole10.getDataSize()); } } } wb.close(); } // add a dummy html to the embeddings folder private static String addHtml(XSSFSheet sh, int oleId) throws IOException, InvalidFormatException { String html10 = "<html><body><marquee>This is the end. Html-id: "+oleId+"</marquee></body></html>"; Ole10Native ole10 = new Ole10Native("html"+oleId+".html", "html"+oleId+".html", "html"+oleId+".html", html10.getBytes("ISO-8859-1")); ByteArrayOutputStream bos = new ByteArrayOutputStream(500); ole10.writeOut(bos); POIFSFileSystem poifs = new POIFSFileSystem(); poifs.getRoot().createDocument(Ole10Native.OLE10_NATIVE, new ByteArrayInputStream(bos.toByteArray())); poifs.getRoot().setStorageClsid(ClassID.OLE10_PACKAGE); final PackagePartName pnOLE = PackagingURIHelper.createPartName( "/xl/embeddings/oleObject"+oleId+".bin" ); final PackagePart partOLE = sh.getWorkbook().getPackage().createPart( pnOLE, "application/vnd.openxmlformats-officedocument.oleObject" ); PackageRelationship prOLE = sh.getPackagePart().addRelationship( pnOLE, TargetMode.INTERNAL, POIXMLDocument.OLE_OBJECT_REL_TYPE ); OutputStream os = partOLE.getOutputStream(); poifs.writeFilesystem(os); os.close(); poifs.close(); return prOLE.getId(); } // add a dummy slideshow to the embeddings folder private static String addSlideShow(XSSFSheet sh, int pptId) throws IOException, InvalidFormatException { XMLSlideShow ppt = new XMLSlideShow(); XSLFTextBox tb = ppt.createSlide().createTextBox(); tb.setText("this is the end - PPT-ID: "+pptId); tb.setAnchor(new Rectangle2D.Double(100,100,100,100)); final PackagePartName pnPPT = PackagingURIHelper.createPartName( "/xl/embeddings/sample"+pptId+".pptx" ); final PackagePart partPPT = sh.getWorkbook().getPackage().createPart( pnPPT, "application/vnd.openxmlformats-officedocument.presentationml.presentation" ); PackageRelationship prPPT = sh.getPackagePart().addRelationship( pnPPT, TargetMode.INTERNAL, POIXMLDocument.PACK_OBJECT_REL_TYPE ); OutputStream os = partPPT.getOutputStream(); ppt.write(os); os.close(); ppt.close(); return prPPT.getId(); } private static int addImageToWorkbook(XSSFWorkbook wb, String fileName, int pictureType) throws IOException { FileInputStream fis = new FileInputStream(fileName); int imgId = wb.addPicture(fis, pictureType); fis.close(); return imgId; } private static String addImageToSheet(XSSFSheet sh, int imgId, int pictureType) throws InvalidFormatException { final PackagePartName pnIMG = PackagingURIHelper.createPartName( "/xl/media/image"+(imgId+1)+(pictureType == Workbook.PICTURE_TYPE_PNG ? ".png" : ".jpeg") ); PackageRelationship prIMG = sh.getPackagePart().addRelationship( pnIMG, TargetMode.INTERNAL, PackageRelationshipTypes.IMAGE_PART ); return prIMG.getId(); } private static int addImageToShape(XSSFSheet sh, XSSFClientAnchor imgAnchor, int imgId) { XSSFDrawing pat = sh.createDrawingPatriarch(); XSSFPicture pic = pat.createPicture(imgAnchor, imgId); CTPicture cPic = pic.getCTPicture(); int shapeId = (int)cPic.getNvPicPr().getCNvPr().getId(); cPic.getNvPicPr().getCNvPr().setHidden(true); CTOfficeArtExtensionList extLst = cPic.getNvPicPr().getCNvPicPr().addNewExtLst(); // https://msdn.microsoft.com/en-us/library/dd911027(v=office.12).aspx CTOfficeArtExtension ext = extLst.addNewExt(); ext.setUri("{63B3BB69-23CF-44E3-9099-C40C66FF867C}"); XmlCursor cur = ext.newCursor(); cur.toEndToken(); cur.beginElement(new QName(drawNS, "compatExt", "a14")); cur.insertAttributeWithValue("spid", "_x0000_s"+shapeId); return shapeId; } private static void addObjectToShape(XSSFSheet sh, XSSFClientAnchor imgAnchor, int shapeId, String objRelId, String imgRelId, String progId) { CTWorksheet cwb = sh.getCTWorksheet(); CTOleObjects oo = cwb.isSetOleObjects() ? cwb.getOleObjects() : cwb.addNewOleObjects(); CTOleObject ole1 = oo.addNewOleObject(); ole1.setProgId(progId); ole1.setShapeId(shapeId); ole1.setId(objRelId); XmlCursor cur1 = ole1.newCursor(); cur1.toEndToken(); cur1.beginElement("objectPr", XSSFRelation.NS_SPREADSHEETML); cur1.insertAttributeWithValue("id", relationshipsNS, imgRelId); cur1.insertAttributeWithValue("defaultSize", "0"); cur1.beginElement("anchor", XSSFRelation.NS_SPREADSHEETML); cur1.insertAttributeWithValue("moveWithCells", "1"); CTTwoCellAnchor anchor = CTTwoCellAnchor.Factory.newInstance(); anchor.setFrom(imgAnchor.getFrom()); anchor.setTo(imgAnchor.getTo()); XmlCursor cur2 = anchor.newCursor(); cur2.copyXmlContents(cur1); cur2.dispose(); cur1.toParent(); cur1.toFirstChild(); cur1.setName(new QName(XSSFRelation.NS_SPREADSHEETML, "from")); cur1.toNextSibling(); cur1.setName(new QName(XSSFRelation.NS_SPREADSHEETML, "to")); cur1.dispose(); } }
我已经通过＃60586申请了一个补丁，所以embedded现在更容易了。 以下snipplet从相应的JUnittesting中获取 。
Workbook wb1 = new XSSFWorkbook(); Sheet sh = wb1.createSheet(); int picIdx = wb1.addPicture(getSamplePng(), Workbook.PICTURE_TYPE_PNG); byte samplePPTX[] = getSamplePPT(true); int oleIdx = wb1.addOlePackage(samplePPTX, "dummy.pptx", "dummy.pptx", "dummy.pptx"); Drawing<?> pat = sh.createDrawingPatriarch(); ClientAnchor anchor = pat.createAnchor(0, 0, 0, 0, 1, 1, 3, 6); pat.createObjectData(anchor, oleIdx, picIdx);