POI修改Excel

Java code

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;

public class ChangeCell {

    @SuppressWarnings("deprecation")
    public static void main(String[] args) {
        String fileToBeRead = "C:\\exp.xls"; // excel位置
        int coloum = 1; // 比如你要获取第1列
        try {
            HSSFWorkbook workbook = new HSSFWorkbook(new FileInputStream(
                    fileToBeRead));
            HSSFSheet sheet = workbook.getSheet("Sheet1");

            for (int i = 0; i <= sheet.getLastRowNum(); i++) {
                HSSFRow row = sheet.getRow((short) i);
                if (null == row) {
                    continue;
                } else {
                    HSSFCell cell = row.getCell((short) coloum);
                    if (null == cell) {
                        continue;
                    } else {
                        System.out.println(cell.getNumericCellValue());
                        int temp = (int) cell.getNumericCellValue();
                        cell.setCellValue(temp + 1);
                    }
                }
            }
            FileOutputStream out = null;
            try {
                out = new FileOutputStream(fileToBeRead);
                workbook.write(out);
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    out.close();
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }

    }

}

 

转载于:https://www.cnblogs.com/ivan0626/archive/2013/02/28/2937832.html

来源：https://blog.csdn.net/weixin_30500105/article/details/99358702