QingLong/src/main/java/UnitTest/ImportExcel/AddComment.java

package UnitTest.ImportExcel;

import com.dsideal.QingLong.Util.PoiUtil;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

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

public class AddComment {
    //工作目录
    public static String path = "D:\\dsWork\\QingLong\\src\\main\\resource\\Excel\\";
    public static void main(String[] args) throws Exception {
        //学校上传的Excel
        String source = path + "1.xlsx";
        //要进行标注的行和列
        int r = 5, c = 6;//第6行第7列
        //字号
        int fontSize = 12;
        //标识的颜色，比如黄色、白色
        short colorIdx = IndexedColors.YELLOW.getIndex();

        //对文件进行校验，标注
        try (FileInputStream fileIn = new FileInputStream(source);
             Workbook workbook = new XSSFWorkbook(fileIn)) {
            //在指定单元格上添加背景黄色+标注提示信息
            PoiUtil.addComment(workbook, 0, r, c, fontSize, colorIdx, "此单元格应该是非空的！");
            // 保存
            FileOutputStream fileOut = new FileOutputStream(source);
            workbook.write(fileOut);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}