java - 写入长值以在 apache POI 中表现出色

Question

当我使用 Apache POI 将长值写入 Excelsheet 中的单元格时，它会使用一些数字操作来写入它。示例:

cell = row.createCell(6);
cell.setCellValue(someObt.getLongValue());  
// long value returned is 365646975447
// in excel sheet, it is written as 3.65647E+11.
// but when i click on the cell, i can see 365646975447 as the value.

我希望它在我写的时候显示准确的值。我该怎么做？

Answer 1

单元格是通用类型而不是数字。

你需要这样做 cell.setCellType(HSSFCell.CELL_TYPE_NUMERIC);

如果您在常规类型的 Excel 单元格中手动复制粘贴 365646975447，它将显示 3.65647E+11。如果将其更改为数字，则它会正确显示。

试试这个:

import java.io.FileOutputStream;

import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.CellStyle;
import org.apache.poi.ss.usermodel.DataFormat;
import org.apache.poi.ss.usermodel.Row;

public class Test
{
    public static void main(String[] args)
    throws Exception
    {
        HSSFWorkbook wb = new HSSFWorkbook();
        HSSFSheet sheet = wb.createSheet("format sheet");
        CellStyle style;
        DataFormat format = wb.createDataFormat();
        short rowNum = 0;
        short colNum = 0;

        Row row = sheet.createRow(rowNum++);
        Cell cell = row.createCell(colNum);
        cell.setCellValue(365646975447.0);
        style = wb.createCellStyle();
        style.setDataFormat(format.getFormat("0.0"));
        cell.setCellStyle(style);


        FileOutputStream fileOut = new FileOutputStream("workbook.xls");
        wb.write(fileOut);
        fileOut.close();
    }
}    

同时检查: http://poi.apache.org/spreadsheet/quick-guide.html