java poi判断excel是xlsx或者xls类型

依赖

<dependency>
    <groupId>org.apache.poi</groupId>
    <artifactId>poi-ooxml</artifactId>
    <version>5.2.5</version>
</dependency>

代码

package com.test.excel;

import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.File;
import java.nio.file.Files;

public class ExcelRateOneTest {

    public static void main(String[] args) {
        File file = new File("D:\\年轻干部人才库名册.xls");
        try {
            Workbook workbook = null;
            try {
                workbook = new XSSFWorkbook(Files.newInputStream(file.toPath()));
            } catch (Exception e) {
                System.out.println("该excel文件不是xlsx类型"+e.getMessage());
            }
            try {
                if (null == workbook) {
                    workbook = new HSSFWorkbook(Files.newInputStream(file.toPath()));
                }
            } catch (Exception e) {
                System.out.println("该文件不是excel文件"+e.getMessage());
            }
            if (workbook != null) {
                Sheet sheet = workbook.getSheetAt(0);
                Row row = sheet.getRow(0);
                Cell cell = row.getCell(0);
                System.out.println("单元格内容：" + getCellValue(cell));
            }
        }catch (Exception e){
            System.out.println(e.getMessage());
        }
    }

    /**
     * 根据单元格类型获取单元格内容，将内容转为字符串类型
     * @param cell 单元格
     * @return
     */
    public static String getCellValue(Cell cell) {
        if (cell == null) {
            return "";
        }
        switch (cell.getCellType()) {
            case STRING:
                return cell.getStringCellValue();
            case NUMERIC:
                return cell.getNumericCellValue() + "";
            case BOOLEAN:
                return cell.getBooleanCellValue() + "";
            case FORMULA:
                return cell.getCellFormula() + "";
            default:
                return "";
        }
    }
}