java - 当某些行已经存在时，Excel POI 意外丢失行

Question

有人已经看到这个错误了吗？

我在创建 HSSFWorkbook 时就知道了

    try {

        LOGGER.info("Open Excel file: " + filename);
        InputStream inputStream = new FileInputStream(filename);
        Workbook wb = new HSSFWorkbook(inputStream);

        Sheet sheet = wb.getSheetAt(0);

        /* save excel */
        FileOutputStream fileOut = new FileOutputStream(filenameOutput);
        wb.write(fileOut);
        fileOut.close();

        wb.close();
        inputStream.close();

    } catch (IOException e1) {
        LOGGER.log(Level.SEVERE, e1.getMessage(), e1);
    }

错误出现在 new HSSFWorkbook(inputstream)

Exception in thread "main" java.lang.RuntimeException: Unexpected missing row when some rows already present
    at org.apache.poi.hssf.usermodel.HSSFSheet.setPropertiesFromSheet(HSSFSheet.java:212)
    at org.apache.poi.hssf.usermodel.HSSFSheet.<init>(HSSFSheet.java:137)
    at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:338)
    at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:289)
    at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:224)
    at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:382)
    at org.apache.poi.hssf.usermodel.HSSFWorkbook.<init>(HSSFWorkbook.java:364)

有什么想法吗？

我在 http://apache-poi.1045710.n5.nabble.com/Unexpected-missing-row-when-some-rows-already-present-td5527417.html 上看到过这个问题但他们没有给出好的答案

我用的是POI 3.12

更新:我的 excel 包含 53 行和数百列，所以他不是空的。 excel 是用 Buisness Object 和 some people have the very same issues 生成的没有解决方案。

HSSFSheet 的源代码是here

Answer 1

好的，我找到了解决方案。

升级到3.14解决问题。

3.13及之前的异常是由this code产生的

  RowRecord row = sheet.getNextRow();
  boolean rowRecordsAlreadyPresent = row != null;


207                 if (hrow == null) {
208                     // Some tools (like Perl module Spreadsheet::WriteExcel - bug 41187) skip the RowRecords
209                     // Excel, OpenOffice.org and GoogleDocs are all OK with this, so POI should be too.
210                     if (rowRecordsAlreadyPresent) {
211                         // if at least one row record is present, all should be present.
212                         throw new RuntimeException("Unexpected missing row when some rows already present");
213                     }

但是在 3.14 they just comment it

    if (hrow == null) {
        /* we removed this check, see bug 47245 for the discussion around this
        // Some tools (like Perl module Spreadsheet::WriteExcel - bug 41187) skip the RowRecords
        // Excel, OpenOffice.org and GoogleDocs are all OK with this, so POI should be too.
        if (rowRecordsAlreadyPresent) {
            // if at least one row record is present, all should be present.
            throw new RuntimeException("Unexpected missing row when some rows already present");
        }*/

        // create the row record on the fly now.
        RowRecord rowRec = new RowRecord(cval.getRow());
        sheet.addRow(rowRec);
        hrow = createRowFromRecord(rowRec);
    }

正如他们所说，一些工具会跳过 RowRec，在我的例子中，当我使用 Buisness 对象

生成我的 .xls 时