注意此问题在poi的changlog中并没有体现。

针对2.5.1版本中代码如下:

类：org.apache.poi.hssf.usermodel.HSSFWorkbook

方法：

public HSSFWorkbook(POIFSFileSystem fs, boolean preserveNodes)
            throws IOException
    {
        this.preserveNodes = preserveNodes;

        if (preserveNodes) {
           this.poifs = fs;
        }

        sheets = new ArrayList(INITIAL_CAPACITY);
        names  = new ArrayList(INITIAL_CAPACITY);

        InputStream stream = fs.createDocumentInputStream("Workbook");

        EventRecordFactory factory = new EventRecordFactory();

      //excel默认为3个sheet记录数为390条记录,偏移量始终从291开始，每增加一行，则记录总数增加2，每增加一列加1
         List records = RecordFactory.createRecords(stream);
     
        workbook = Workbook.createWorkbook(records);
        setPropertiesFromWorkbook(workbook);
        int recOffset = workbook.getNumRecords();
        int sheetNum = 0;

        //如果只有一个sheet则记录数为322，偏移量为289

        while (recOffset < records.size())
        {

            Sheet sheet = Sheet.createSheet(records, sheetNum++, recOffset );

            //正确的数据应该每一格SHEET记录处理完成后他的偏移了为322+他的记录行数与列数，
            //这里需要获得结束标签的所处的位置数，为什么要加1，因为是从0推的

           recOffset = sheet.getEofLoc()+1;

 //针对2.5.1如果excel文件的结束标签有问题，则会导致计算不出来结束标签的位置，这样就会造成返回的地recOffset偏移量为1；所以后来在2007年的3.0正式版本中弥补了此处的问题，加入了一个判断
            if(recOffset == 1){

                     break;

             }
            sheet.convertLabelRecords(
                    workbook);   // convert all LabelRecord records to LabelSSTRecord
            HSSFSheet hsheet = new HSSFSheet(workbook, sheet);

            sheets.add(hsheet);

            // workbook.setSheetName(sheets.size() -1, "Sheet"+sheets.size());
        }

        for (int i = 0 ; i < workbook.getNumNames() ; ++i){
            HSSFName name = new HSSFName(workbook, workbook.getNameRecord(i));
            names.add(name);
        }
    }

如果是2.5版本的poi还需要修改为以下红色部分

        nameRecord = findExistingRowColHeaderNameRecord(sheetIndex);
        if (removingRange )
        {
            if (nameRecord != null)
                workbook.removeName(findExistingRowColHeaderNameRecordIdx(sheetIndex+1));
            return;
        }
        if ( nameRecord == null )
        {
            nameRecord = workbook.createBuiltInName(NameRecord.BUILTIN_PRINT_TITLE, sheetIndex+1);
            //does a lot of the house keeping for builtin records, like setting lengths to zero etc
            isNewRecord = true;
        }