Object (POJO) is getting null about spring-batch-extensions HOT 2 CLOSED

public class ExcelUtils {
    public static <T> ItemReader<T> excelToItemReader(Path file, Class<T> clazz) throws Exception {
        PoiItemReader<T> reader = new PoiItemReader<>();
        reader.setLinesToSkip(1);
        System.out.println("File Name: " + file.toString()); // Displays: File Name: uploads/excel/<Excel file selected to import>
        Resource resource = new FileSystemResource(file);
        System.out.println("File exists? " + resource.exists()); // Displays: File exists? true
        reader.setResource(resource);
        reader.setRowMapper(excelRowMapper(clazz));
        reader.afterPropertiesSet(); // To ensure proper set
        reader.open(new ExecutionContext()); // To ensure properly opened and accessible file
        return reader;
    }

    private static <T> RowMapper<T> excelRowMapper(Class<T> clazz) {
        BeanWrapperRowMapper<T> rowMapper = new BeanWrapperRowMapper<>();
        rowMapper.setTargetType(clazz);
        rowMapper.afterPropertiesSet();
        return rowMapper;
    }
}

@PostMapping("/import")
public String importStudents(@RequestParam String fileName, RedirectAttributes redirectAttributes) throws Exception {
    PoiItemReader<Student> studentItemReader = ExcelUtils.excelToItemReader(storageService.load(fileName), Student.class);
    try {
      Student student = studentItemReader.read();
    finally {
     studentItemReader.close(); // Close reader to release resources
    }
    if (student != null) {
        System.out.println("Student has data.");
        studentService.save(student);
    } else {
        System.out.println("Student is null");
        throw new Exception("Student is null");
    }

    redirectAttributes.addFlashAttribute("message", "You successfully imported students data from " + fileName + "!");

    return "redirect:/students";
}