java代码poi包实现excel文件末尾追加签名图片功能_java可以实现签名图片放到表格中的指定位置吗

功能描述：

在已有的excel中末行位置追加审批链岗位及对应审批人的签名

功能实现：

package org.example;
 
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.util.IOUtils;
import org.apache.poi.xssf.usermodel.*;
 
import java.io.*;
 
public class excelImageTest {
    public static void main(String[] args) throws IOException {
 
        // 打开文件流
        FileInputStream fileInputStream = new FileInputStream("C:/Users/A.xlsx");
        // 创建工作簿对象
        Workbook workbook = new XSSFWorkbook(fileInputStream);
        // 创建工作表
        Sheet sheet = workbook.getSheetAt(0);
 
        // 读取最后一行的行号，以获取空行数
        int emptyRowCount = 0;
        for (int i = 0; i >= 0; i++) { // 从最后一行开始向前遍历所有行
            Row row = sheet.getRow(i); // 获取第i行对象
            if (row == null || row.getPhysicalNumberOfCells() == 0) { // 如果该行是空行或没有单元格，则增加空行计数器
                emptyRowCount = i;
                break;
            }
        }
        int physicalNumberOfCells = sheet.getRow(0).getPhysicalNumberOfCells();
        System.out.println(physicalNumberOfCells);
        for (int i = physicalNumberOfCells ; i < 5*2; i++) {
            sheet.setColumnWidth(i,sheet.getColumnWidth(0));
        }
 
        // 创建行
        Row row = sheet.createRow(emptyRowCount + 1);
        for (int i = 0; i < 5; i++) {
            // 创建单元格并设置值
            Cell cell1 = row.createCell(i*2);
            cell1.setCellValue("部门主要负责人");
            // 创建单元格并设置值
            Cell cell = row.createCell(i*2+1);
            // 读取图片文件并获取输入流
            InputStream inputStream = new FileInputStream("C:/Users/chens/Pictures/Saved Pictures/5fce7df964894735be9a0e11ca112068.png");
            byte[] bytes = IOUtils.toByteArray(inputStream);
            int pictureIdx = workbook.addPicture(bytes, Workbook.PICTURE_TYPE_JPEG);
            // 创建图片数据区域
            CreationHelper helper = workbook.getCreationHelper();
            Drawing drawing = sheet.createDrawingPatriarch();
            ClientAnchor anchor = helper.createClientAnchor();
            anchor.setCol1(cell.getColumnIndex());
            anchor.setRow1(cell.getRowIndex());
            Picture pict = drawing.createPicture(anchor, pictureIdx);
            // 根据需要调整图片大小
            pict.resize(0.8,2.618); 
        }
 
        // 写入到文件
        FileOutputStream fileOut = new FileOutputStream("C:/Users/B.xlsx");
        workbook.write(fileOut);
        fileOut.close();
        fileInputStream.close();
    }
}

功能实现效果：