在Java中读取Excel文件列

<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>

import org.apache.poi.ss.usermodel.*;

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;

public class ExcelReader {
    public static void main(String[] args) {
        try {
            // 创建文件输入流
            FileInputStream file = new FileInputStream(new File("path/to/excel/file.xlsx"));

            // 创建工作簿对象
            Workbook workbook = WorkbookFactory.create(file);

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

            // 获取第一列的索引
            int columnIndex = 0;

            // 遍历每一行并读取指定列的数据
            for (Row row : sheet) {
                Cell cell = row.getCell(columnIndex);
                if (cell != null) {
                    String cellValue = cell.getStringCellValue();
                    System.out.println(cellValue);
                }
            }

            // 关闭工作簿和文件输入流
            workbook.close();
            file.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}