小编Sha*_*sir的帖子

我是 apache POI java 开发的新手，我正在尝试使用以下代码将水印添加到 excel。但是水印 id 覆盖了它后面的内容。我想在背景中添加水印。

public class xlWatermark {
    public static void main(String[] args) {
        HSSFWorkbook wb = new HSSFWorkbook();
        FileOutputStream fileOut = null;
        try {
            fileOut = new FileOutputStream("Test.xls");
            HSSFSheet ws = wb.createSheet("testSheet");
            HSSFPatriarch dp = ws.createDrawingPatriarch();
            HSSFClientAnchor anchor = new HSSFClientAnchor
                (0, 0, 1023, 255, (short) 2, 4, (short) 13, 26);
            HSSFTextbox txtbox = dp.createTextbox(anchor);
            HSSFRichTextString rtxt = new HSSFRichTextString("test");
            HSSFFont font = wb.createFont();
            font.setColor((short) 27);
            font.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
            font.setFontHeightInPoints((short) 192);
            font.setFontName("Verdana");
            rtxt.applyFont(font);
            txtbox.setString(rtxt);
            txtbox.setLineStyle(HSSFShape.LINESTYLE_NONE);
            txtbox.setNoFill(true);
            wb.write(fileOut); …

我正在尝试读取作为 base64 字符串收到的 csv 文件，如下所示

csvBase64Content = "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"

decrypted = b64.b64decode(csvBase64Content)
with open(decrypted) as csvFile:
   #other stuff

出现错误：

OSError: [Errno 22] Invalid argument: