将新单元格写入工作表 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，用于使用 apache poi 读取 excel，它是一个 .xlsx 文件.请让我知道我能做什么，在我的循环继续进行时，在每一行中更改单元格的值.谢谢

import java.io.FileInputStream;导入 org.apache.poi.ss.usermodel.Cell;导入 org.apache.poi.xssf.usermodel.XSSFRow;导入 org.apache.poi.xssf.usermodel.XSSFSheet;导入 org.apache.poi.xssf.usermodel.XSSFWorkbook；String fileName = "C:/createCDN.xlsx";FileInputStream fis = null;fis = new FileInputStream(fileName);XSSFWorkbook 工作簿 = 新 XSSFWorkbook(fis);FileOutputStream fos=new FileOutputStream(fileName);XSSFSheet sheet = workbook.getSheetAt(0);int totalRows=sheet.getLastRowNum();for(int i=1;i<=totalRows;i++) {XSSFRow 行 = sheet.getRow(i);method.fillTextBox(row.getCell(0),"name", pageProp);method.fillTextBox(row.getCell(0),"name", pageProp);}//在这里做一些事情，或者在循环内写入让我们说同一行的单元格(2).

谢谢.

解决方案

应该是这样的:

for(int i = 1; i <= totalRows; i++) {行行 = sheet.getRow(i);单元格单元格 = row.getCell(2);如果(单元格 == 空){单元格 = row.createCell(2);}cell.setCellType(Cell.CELL_TYPE_STRING);cell.setCellValue("某个值");}

要保存工作簿，您只需编写:

FileOutputStream fos = new FileOutputStream(fileName);工作簿.写(fos)；fos.close();

您应该查看POI 的繁忙开发人员指南..>

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.

Thanks.

解决方案

It should be like this:

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");
}

To save the workbook you could just write:

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

You should take a look at POI's Busy Developers' Guide.

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