Question

我有一个应用程序，我正在编辑一个excel xls文件。我想要一段代码来演示如何添加包含png图像的注释。我已经找到了示例代码，显示了如何向单元格添加注释。我不确定如何在评论中添加图片。

Answer 1

我从这个例子开始：https://poi.apache.org/spreadsheet/quick-guide.html（参见Cell Comments - HSSF和XSSF）并找到了setBackgroundImage方法。

HSSFPatriarch      patriarch;
HSSFClientAnchor   anchor;
HSSFCreationHelper factory;
HSSFComment        comment;
ByteArrayOutputStream baos;
HSSFCell cell;
HSSFRow  row;
int      picIndex;

.
.
.
baos = getPicture2(lda.getRecNo());
if(baos != null) {
    picIndex = wb.addPicture(baos.toByteArray(),
                             HSSFWorkbook.PICTURE_TYPE_JPEG);

    /* add comment with picture in it */
    int c = cell.getColumnIndex();
    int r = cell.getRowIndex();

    anchor = factory.createClientAnchor();
    anchor.setCol1(c);
    anchor.setCol2(c+4);
    anchor.setRow1(r);
    anchor.setRow2(r+8);

    comment = patriarch.createCellComment(anchor);
    //richTextString = factory.createRichTextString("optional text will appear on top of picture");
    //comment.setString(richTextString);
    //comment.setAuthor("Apache POI");
    comment.setBackgroundImage(picIndex); // set picture as background image

    cell.setCellComment(comment);

    Log.v(TAG, "added comment to row: " + 
               String.valueOf(r) + 
               " col: " + String.valueOf(c));
}
.
.
.                                      
/* 
 * get picture from product from picture number
 */
public ByteArrayOutputStream getPicture2(int picNo) {

    String fileSpec;
    FileInputStream   picFileInputStream;
    File     picFile;
    //long   picLength;
    byte[]   picData = null;
    ByteArrayOutputStream baos = null;
    int b;

    try {
        baos = new ByteArrayOutputStream();
        fileSpec = "put your directory and filename here";

        picFile = new File(fileSpec);
        picFileInputStream = new FileInputStream(fileSpec);
        if(picFile.exists()) {

            while((b=picFileInputStream.read()) != -1) {
                baos.write(b);
            }
            picData = IOUtils.toByteArray(picFileInputStream);

            picFileInputStream.close();
        }

    } catch (IOException e) {
        e.printStackTrace();
    }  catch (Exception e) {
        e.printStackTrace();
    } 
    return baos;
}

apache poi插入评论与图片

1 个答案: