Apache poi 在图像中放置超链接

Question

这是我用于在 Excel 中插入图像作为图标的方法：

public void insertIcons(String URL, Sheet sheet, int colBegin, int colEnd, int rowBegin, int rowEnd) {
    try {
        InputStream iconInput = new FileInputStream(URL);
        byte[] byteTransf = IOUtils.toByteArray(iconInput);
        int pictureIdx = workbook.addPicture(byteTransf, org.apache.poi.ss.usermodel.Workbook.PICTURE_TYPE_PNG);
        iconInput.close();


        CreationHelper helper = workbook.getCreationHelper();
        Drawing drawingIcon = sheet.createDrawingPatriarch();

        ClientAnchor anchorIcon = helper.createClientAnchor();
        anchorIcon.setCol1(colBegin);
        anchorIcon.setCol2(colEnd);
        anchorIcon.setRow1(rowBegin);
        anchorIcon.setRow2(rowEnd);

        Picture iconReady = drawingIcon.createPicture(anchorIcon, pictureIdx);
        iconReady.resize(1);

    } catch (Exception e) {
        e.printStackTrace();
    }
}

这是我使用这种方法来创建图标：

insertIcons(".idea/Icons/table.png", sheetName, 4, 4, 6, 9);

是否可以在此图标中放置超链接以转到同一电子表格中的另一个工作表或网站？

我读到显然 POI 不支持，但使用底层的低级 API 是可能的。但是我还没有能够真正成功地使用它。

有什么建议？

Answer 1

如果你只支持XSSF，那么这真的可以使用底层的低级对象来完成。

如何开始？使用包含Excel超链接的图片创建工作簿。然后解压缩*.xlsx并查看/xl/drawings/drawing1.xml. 在那里你会发现：

<xdr:pic>
 <xdr:nvPicPr>
  <xdr:cNvPr id="1" name="Picture 1" descr="Picture">
   <a:hlinkClick r:id="rId2"/>
  </xdr:cNvPr>
...

所以图片具有非视觉图片设置，具有非视觉属性，具有rId设置的超链接点击。

rId指向关系的点，所以看看xl/drawings/_rels/drawing1.xml.rels。在那里你会发现设置为那个的超链接目标rId。

因此，我们需要设置具有非视觉属性的非视觉图片设置，并具有超链接点击。但我们还需要设置关系以获取rId.

首先，我们从org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTPicture开始。在CTPicture我们可以从XSSFPicture。

要做到第二，我们需要PackagePart.addExternalRelationship哪里PackagePart可以从得到XSSFDrawing。

完整示例：

import java.io.*;

import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.*;
import org.apache.poi.ss.usermodel.ClientAnchor.AnchorType;
import org.apache.poi.util.IOUtils;

import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTPicture;
import org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.CTPictureNonVisual;
import org.openxmlformats.schemas.drawingml.x2006.main.CTNonVisualDrawingProps;
import org.openxmlformats.schemas.drawingml.x2006.main.CTHyperlink;

import org.apache.poi.openxml4j.opc.PackageRelationship;
import org.apache.poi.openxml4j.opc.PackageRelationshipTypes;

public class CreateExcelPicturesHyperlink {

 private static Picture drawImageOnExcelSheet(Sheet sheet, int row1, int col1, 
  int row2, int col2, String pictureurl, int picturetype) throws Exception {

  InputStream is = new FileInputStream(pictureurl);
  byte[] bytes = IOUtils.toByteArray(is);
  int pictureIdx = sheet.getWorkbook().addPicture(bytes, picturetype);
  is.close();

  CreationHelper helper = sheet.getWorkbook().getCreationHelper();

  Drawing drawing = sheet.createDrawingPatriarch();

  ClientAnchor anchor = helper.createClientAnchor();
  anchor.setAnchorType(AnchorType.MOVE_AND_RESIZE);

  anchor.setRow1(row1); //first anchor determines upper left position
  anchor.setCol1(col1); 
  anchor.setRow2(row2); //second anchor determines bottom right position
  anchor.setCol2(col2);

  Picture picture = drawing.createPicture(anchor, pictureIdx);
  return picture;
 }

 private static void setHyperlinkToPicture(Picture picture, String hyperlinkurl) throws Exception {
  if (picture instanceof XSSFPicture) {
   XSSFPicture xssfpicture = (XSSFPicture)picture;

   XSSFDrawing drawing = xssfpicture.getSheet().createDrawingPatriarch();
   PackageRelationship packagerelationship = 
    drawing.getPackagePart().addExternalRelationship(hyperlinkurl, PackageRelationshipTypes.HYPERLINK_PART);
   String rid = packagerelationship.getId();

   CTPicture ctpicture = xssfpicture.getCTPicture();
   CTPictureNonVisual ctpicturenonvisual = ctpicture.getNvPicPr();
   if (ctpicturenonvisual == null) ctpicturenonvisual = ctpicture.addNewNvPicPr();
   CTNonVisualDrawingProps ctnonvisualdrawingprops = ctpicturenonvisual.getCNvPr();
   if (ctnonvisualdrawingprops == null) ctnonvisualdrawingprops = ctpicturenonvisual.addNewCNvPr();
   CTHyperlink cthyperlink = ctnonvisualdrawingprops.getHlinkClick();
   if (cthyperlink == null) cthyperlink = ctnonvisualdrawingprops.addNewHlinkClick();
   cthyperlink.setId(rid);

  }
 }

 public static void main(String[] args) throws Exception {

  Workbook workbook = new XSSFWorkbook();
  Sheet sheet = workbook.createSheet("Sheet1");

  Picture picture = drawImageOnExcelSheet(sheet, 2, 2, 4, 4, "samplePict1.jpeg", Workbook.PICTURE_TYPE_JPEG);
  setHyperlinkToPicture(picture, "http://www.google.de");

  workbook.createSheet("Sheet2");
  picture = drawImageOnExcelSheet(sheet, 6, 2, 8, 4, "samplePict2.png", Workbook.PICTURE_TYPE_PNG);
  setHyperlinkToPicture(picture, "#Sheet2!B3");

  FileOutputStream out = new FileOutputStream("./CreateExcelPicturesHyperlink.xlsx");
  workbook.write(out);
  out.close();
  workbook.close();

 }

}