apache poi cellIterator跳过空白单元格，但不在第一行

Question

public ArrayList OpenAndReadExcel(){
    FileInputStream file = null;
    HSSFWorkbook workBook = null;
    ArrayList <String> rows = new ArrayList();

    //open the file

    try {
         file = new FileInputStream(new File("Fruity.xls"));
    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        System.out.println("Could not open Input File");
        e.printStackTrace();
    }

    //  open the input stream as a workbook

        try {
             workBook = new HSSFWorkbook(file);
        } catch (IOException e) {
            // TODO Auto-generated catch block
            System.out.println("Can't Open HSSF workbook");
            e.printStackTrace();
        }

        // get the sheet
        HSSFSheet sheet = workBook.getSheetAt(0);

        // add an iterator for every row and column
        Iterator<Row> rowIter = sheet.rowIterator();

        while (rowIter.hasNext())
        {

            String rowHolder = "";
            HSSFRow row = (HSSFRow) rowIter.next();
            Iterator<Cell> cellIter = row.cellIterator();
            Boolean first =true;
            while ( cellIter.hasNext())
            {
                if (!first)
                    rowHolder = rowHolder + ",";

                HSSFCell cell = (HSSFCell) cellIter.next();

                rowHolder = rowHolder + cell.toString() ;
                first = false;
            }

            rows.add(rowHolder);

        }

    return rows;

}
public void WriteOutput(ArrayList<String> rows) {

    // TODO Auto-generated method stub
    PrintStream outFile ;
    try {


        outFile = new PrintStream("fruity.txt");
        for(String row : rows)
        {   
            outFile.println(row);
        }
        outFile.close();

    } catch (FileNotFoundException e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}

Notice the two extra commas before the Grade column... This is because I have two blank columns there.<br/>

其余输出中缺少这些额外的逗号。

我使用的是Apache Poi-3.9-20121203.jar

Answer 1

您应该阅读Apache POI网站上的迭代行和单元格文档。

CellIterator将只返回文件中定义的单元格，这很大程度上意味着具有值或格式的单元格。excel文件格式是稀疏的，不需要存储既没有值也没有格式的单元格。

对于您的情况，必须将格式应用到第一行，从而使它们显示出来。