如何使用Apache POI读取所有单元格值？

<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>

Workbook workbook = new XSSFWorkbook(new FileInputStream("path/to/excel.xlsx"));

Sheet sheet = workbook.getSheetAt(0); // 通过索引获取第一个工作表
// 或者
Sheet sheet = workbook.getSheet("Sheet1"); // 通过名称获取工作表

for (Row row : sheet) {
    for (Cell cell : row) {
        String cellValue = "";
        switch (cell.getCellType()) {
            case STRING:
                cellValue = cell.getStringCellValue();
                break;
            case NUMERIC:
                cellValue = String.valueOf(cell.getNumericCellValue());
                break;
            case BOOLEAN:
                cellValue = String.valueOf(cell.getBooleanCellValue());
                break;
            // 其他类型的单元格处理方式
        }
        System.out.println(cellValue);
    }
}