excel递归读取目录并输出

添加依赖

		<dependency>
			<groupId>org.apache.poi</groupId>
			<artifactId>poi</artifactId>
			<version>4.1.2</version>
		</dependency>

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

第一种：
package com.xxl.job.admin.test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class FolderToExcel {
    private static int rowNum = 0;

    public static void main(String[] args) throws IOException {
        String folderPath = "E:/repo"; // 文件夹路径
        String excelPath = "E:/output.xlsx"; // Excel文件路径

        XSSFWorkbook workbook = new XSSFWorkbook();
        org.apache.poi.ss.usermodel.Sheet sheet = workbook.createSheet("Folder");

        File folder = new File(folderPath);
        if (folder.isDirectory()) {
            createFolderSheet(folder, sheet, "");
        }

        FileOutputStream outputStream = new FileOutputStream(excelPath);
        workbook.write(outputStream);
        workbook.close();
        outputStream.close();

        System.out.println("Exported to " + excelPath);
    }

    private static void createFolderSheet(File folder, org.apache.poi.ss.usermodel.Sheet sheet, String parentPath) {
        Row row = sheet.createRow(rowNum++);
        Cell cell = row.createCell(0);
        cell.setCellValue(parentPath + folder.getName());

        if (folder.isDirectory()) {
            for (File subFolder : folder.listFiles()) {
                createFolderSheet(subFolder, sheet, parentPath + folder.getName() + " ");
            }
        }
    }
}


第二种
package com.xxl.job.admin.test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

public class FolderToExcel {
    private static int rowNum = 0;

    public static void main(String[] args) throws IOException {
        String folderPath = "E:/repo"; // 文件夹路径
        String excelPath = "E:/output2.xlsx"; // Excel文件路径

        XSSFWorkbook workbook = new XSSFWorkbook();
        org.apache.poi.ss.usermodel.Sheet sheet = workbook.createSheet("Folder");

        File folder = new File(folderPath);
        if (folder.isDirectory()) {
            createFolderSheet(folder, sheet, "");
        }

        FileOutputStream outputStream = new FileOutputStream(excelPath);
        workbook.write(outputStream);
        workbook.close();
        outputStream.close();

        System.out.println("Exported to " + excelPath);
    }

    private static void createFolderSheet(File folder, org.apache.poi.ss.usermodel.Sheet sheet, String parentPath) {
        if (folder.isDirectory()) {
            Row row = sheet.createRow(rowNum++);
            Cell cell = row.createCell(0);
            cell.setCellValue(parentPath + folder.getName());

            for (File subFolder : folder.listFiles(File::isDirectory)) {
                createFolderSheet(subFolder, sheet, parentPath + folder.getName() + " ");
            }
        }
    }
}