java - Apache POI 插入图像

Question

我在制作 Excel 表格时遇到问题。关于这个主题有很多问题，但我根本无法弄清楚我做错了什么。我的代码运行，没有显示任何错误，但我没有看到插入的图像 :(

代码如下:

    InputStream is = new FileInputStream("nasuto_tlo.png");
    byte [] bytes = IOUtils.toByteArray(is); 
    int pictureIndex = wb.addPicture(bytes, Workbook.PICTURE_TYPE_PNG);
    is.close();

    CreationHelper helper = wb.getCreationHelper();
    Drawing drawingPatriarch = sheet.createDrawingPatriarch();
    ClientAnchor anchor = helper.createClientAnchor();

    anchor.setCol1(2);
    anchor.setRow1(3);
    Picture pict = drawingPatriarch.createPicture(anchor, pictureIndex);
    pict.resize();

    try {
        FileOutputStream out = new FileOutputStream(root+"/Busotina/Busotina1.xls");
        wb.write(out);
        out.close();
    } catch (Exception e) {
        e.printStackTrace();
    }

Answer 1

问题是你的 anchor 不正确。您需要设置所有 4 个值，因为默认值为 0 - 但您的第一列不能比第二列更正确；)您将得到负范围。当您打开 excel 文件时，您应该会收到一条警告，指出它已损坏。

那么试试

anchor.setCol1(2);
anchor.setCol2(3);
anchor.setRow1(3);
anchor.setRow2(4);

---

来 self 编写的一些代码的工作示例:

// read the image to the stream
final FileInputStream stream =
        new FileInputStream( imagePath );
final CreationHelper helper = workbook.getCreationHelper();
final Drawing drawing = sheet.createDrawingPatriarch();

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


final int pictureIndex =
        workbook.addPicture(IOUtils.toByteArray(stream), Workbook.PICTURE_TYPE_PNG);


anchor.setCol1( 0 );
anchor.setRow1( LOGO_ROW ); // same row is okay
anchor.setRow2( LOGO_ROW );
anchor.setCol2( 1 );
final Picture pict = drawing.createPicture( anchor, pictureIndex );
pict.resize();