Java导出excel中某一列为链接 将该列自动展示未图片

你可以使用POI库来实现在Excel中将某一列作为链接，然后将该列自动展示为图片的功能。

首先，你需要将某一列设置为链接。以下是一个示例代码：

Sheet sheet = workbook.createSheet("Sheet1");
Row row = sheet.createRow(0);
Cell cell = row.createCell(0);
cell.setCellValue("Link to Google");
CreationHelper creationHelper = workbook.getCreationHelper();
Hyperlink link = creationHelper.createHyperlink(HyperlinkType.URL);
link.setAddress("https://www.google.com");
cell.setHyperlink(link);

接下来，你需要将该列转换为图片并插入到Excel中。以下是一个示例代码：

// Get the column that contains the hyperlink
int columnIndex = 0; // The first column
List<String> hyperlinkValues = new ArrayList<>();
for (Row currentRow : sheet) {
    Cell currentCell = currentRow.getCell(columnIndex);
    if (currentCell != null && currentCell.getCellType() == CellType.STRING) {
        hyperlinkValues.add(currentCell.getStringCellValue());
    } else {
        hyperlinkValues.add("");
    }
}

// Create a new sheet to hold the images
Sheet imageSheet = workbook.createSheet("Images");

// Set the column width to hold the images
imageSheet.setColumnWidth(0, 256 * 20);

// Add the images to the sheet
for (int i = 0; i < hyperlinkValues.size(); i++) {
    String hyperlinkValue = hyperlinkValues.get(i);
    if (!hyperlinkValue.isEmpty()) {
        URL url = new URL(hyperlinkValue);
        InputStream inputStream = url.openStream();
        byte[] bytes = IOUtils.toByteArray(inputStream);
        int pictureIndex = workbook.addPicture(bytes, Workbook.PICTURE_TYPE_JPEG);
        inputStream.close();
        CreationHelper helper = workbook.getCreationHelper();
        Drawing drawing = imageSheet.createDrawingPatriarch();
        ClientAnchor anchor = helper.createClientAnchor();
        anchor.setRow1(i);
        anchor.setCol1(0);
        Picture picture = drawing.createPicture(anchor, pictureIndex);
        picture.resize();
    }
}

这样就可以将某一列中的链接自动转换为图片并插入到Excel中了。注意，这个示例代码仅适用于包含JPEG格式图片的链接，如果你的链接包含其他格式的图片，你需要做一些修改来适应不同的图片格式。