java读取excel，将空行上移

改造前：

效果图：

上代码：

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 RemoveEmptyRows {
    public static void main(String[] args) {

        // 设置Excel文件路径
        String excelFilePath = "C:\\Users\\17315\\Desktop\\newFolder\\合并单元格.xlsx";

        // 读取Excel文件
        try (FileInputStream fis = new FileInputStream(excelFilePath);
             Workbook workbook = new XSSFWorkbook(fis)) {

            // 获取第一个工作表
            Sheet sheet = workbook.getSheetAt(0);

            String remarkValue = "";
            String remarkNextValue = "";
            String remarkValue1 = "";
            String remarkNextValue1 = "";
            String remarkValue2 = "";
            // 循环遍历行，从最后一行开始
            for (int rowIndex = sheet.getLastRowNum(); rowIndex >= 0; rowIndex--) {

                Row row = sheet.getRow(rowIndex);
                if(row==null){
                    sheet.shiftRows(rowIndex+1 , sheet.getLastRowNum(), -1);
                }else {
                    // 获取A列的单元格
                    if (row.getCell(0) == null) {

                        if(row.getCell(5)!=null){

                            Row remarkRow = sheet.getRow(rowIndex-1);
                            remarkValue1 = remarkValue.concat(remarkRow.getCell(5).getStringCellValue() + "|");
                            remarkNextValue1 = remarkNextValue.concat(row.getCell(5).getStringCellValue());
                            remarkValue2 = remarkValue1.concat(remarkNextValue1);
                            Cell remarkCell = remarkRow.createCell(5);
                            remarkCell.setCellValue(remarkValue2.toString());
                            System.out.println("remarkCell " + remarkValue2);
                        }
                        // 如果A列单元格为空，删除该行
                        //sheet.removeRow(row);
                        // 移动删除行上方的行，使单元格连续
                        sheet.shiftRows(rowIndex+1 , sheet.getLastRowNum(), -1);

                    } else {
                        // 如果A列单元格不为空，结束循环
                        continue;
                    }
                }
            }
            // 保存修改后的Excel文件
            try (FileOutputStream fos = new FileOutputStream(excelFilePath)) {
                workbook.write(fos);
            }
            System.out.println("删除空行并将下方行上移成功。");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

    <dependency>
      <groupId>org.apache.poi</groupId>
      <artifactId>poi</artifactId>
      <version>5.2.3</version>
    </dependency>
    <dependency>
      <groupId>org.apache.poi</groupId>
      <artifactId>poi-ooxml</artifactId>
      <version>5.2.3</version>
    </dependency>
      <dependency>
        <groupId>org.apache.poi</groupId>
        <artifactId>poi-ooxml-schemas</artifactId>
        <version>4.1.2</version>
      </dependency>
    <dependency>
      <groupId>org.apache.poi</groupId>
      <artifactId>poi-scratchpad</artifactId>
      <version>5.2.3</version>
    </dependency>

tips:poi版本4.0.1以下shiftRows方法，移动单元格缺少复制下部单元格，此处建议使用4.1.2之上版本