如何在Excel工作表中垂直表示地图内容

Question

我有一张地图，其内容应垂直呈现，而不是水平布局

Multimap<Integer, String> map = getMap();
            XSSFWorkbook workbook = new XSSFWorkbook(); 
            XSSFSheet spreadsheet = workbook.createSheet("companyInsurence");
            XSSFRow row;
            Set < Integer > keyid = map.keySet();
            row = spreadsheet.createRow(0);

        Cell InitialCell=row.createCell(0);
        InitialCell.setCellValue("id");

        Cell InitialCell1=row.createCell(1);
        InitialCell1.setCellValue("date");

        int rowid = 1;
        for (Integer key : keyid){
            row = spreadsheet.createRow(rowid++);
            Cell cell0 = row.createCell(0);
            cell0.setCellValue(key);
            Collection<String>  objectList = map.get(key);

            int cellid = 1;
            for (Object obj : objectList)
            {
                Cell cell = row.createCell(cellid++);
                if(obj!=null){
                    cell.setCellValue(obj.toString());
                }else{
                    cell.setCellValue("  ");
                }
            }
        }

amd地图内容是 {12 = [1,2,3,4,5,6,6,6]，[13] = [123456,988,65，HGG，91]}

因此excel表将数据显示为

id       date
12       1   2   4   ....
13       123456  988  65

所以不是这样，我想要这样的东西

id   date
12   1
12   2
12   3
12   4
12   5
12   6
:
:
:
:
13  65

Answer 1

您需要为每个值创建一行，而不是每个键。

int rowid = 1;
for (Integer key : keyid){
    Collection<String>  objectList = map.get(key);
    for (Object obj : objectList)
    {
        row = spreadsheet.createRow(rowid++);
        Cell cell0 = row.createCell(0);
        cell0.setCellValue(key);
        Cell cell = row.createCell(1);
        if(obj!=null){
            cell.setCellValue(obj.toString());
        }else{
            cell.setCellValue("  ");
        }
    }
}

注意：我还没有这样做。