将新的单元格写入工作表apache poi [英] writing a new cell to a sheet apache poi

问题描述

我正在使用以下代码，以便使用apache poi(其.xlsx文件)读取Excel.请让我知道我可以做些什么，也可以在循环不断进行的同时更改每行中一个单元格的值.谢谢

i am using following code, for reading a excel using apache poi, its a .xlsx file. Please let me know what i can do, to also alter a value of a cell, in each row as my loop keeps going. Thanks

import java.io.FileInputStream;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

String fileName = "C:/createCDN.xlsx";
FileInputStream fis = null;
fis = new FileInputStream(fileName);
XSSFWorkbook workbook = new XSSFWorkbook(fis);
FileOutputStream fos=new FileOutputStream(fileName);
XSSFSheet sheet = workbook.getSheetAt(0);
int totalRows=sheet.getLastRowNum();
for(int i=1;i<=totalRows;i++) {
    XSSFRow row = sheet.getRow(i);
    method.fillTextBox(row.getCell(0),"name", pageProp);
    method.fillTextBox(row.getCell(0),"name", pageProp);
} //Do something here, or inside loop to write to lets say cell(2) of same row.

谢谢.

推荐答案

应该是这样的:

for(int i = 1; i <= totalRows; i++) {
    Row row = sheet.getRow(i);
    Cell cell = row.getCell(2);
    if (cell == null) {
        cell = row.createCell(2);
    }
    cell.setCellType(Cell.CELL_TYPE_STRING);
    cell.setCellValue("some value");
}

要保存工作簿，您可以编写:

To save the workbook you could just write:

FileOutputStream fos = new FileOutputStream(fileName);
workbook.write(fos);
fos.close();

您应该查看 POI忙碌的开发人员指南.

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