接收MultipartFile直接转化为Workbook
情况1:
直接这样转化
//不管2003 .xls还是2007 .xlsx 都是 //用 new XSSFWorkbook(file.getInputStream())将MultipartFile文件转为Workbook文件 Workbook workbook = new XSSFWorkbook(file.getInputStream());
情况2:(错误)
刚开始以为需要2003的.xls要对应的HSSFWorkbook去接转化,2007的.xlsx要对应XSSFWorkbook.
这样做会报什么版本问题,如下:
org.apache.poi.poifs.filesystem.OfficeXmlFileException: The supplied data appears to be in the Office 2007+ XML. You are calling the part of POI that deals with OLE2 Office Documents. You need to call a different part of POI to process this data (eg XSSF instead of HSSF)
情况3:(错误)
网上说用这个 ,不过也是报了上面的错误。
Workbook workbook = new HSSFWorkbook(new POIFSFileSystem(file.getInputStream())); //错误写法
下面写个demo来测试:
控制层代码:
package cn.mindgd.controller.background; import cn.mindgd.service.ExcelService; import lombok.extern.slf4j.Slf4j; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.PostMapping; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestParam; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.multipart.MultipartFile; /** * @author JiaXinMa * @description Excel测试控制层 * @date 2021/7/22 */ @Slf4j @RestController @RequestMapping("/excel") public class ExcelController { @Autowired private ExcelService excelService; @PostMapping("/uploadExcel") public void uploadExcel(@RequestParam("file") MultipartFile file) { log.info("/excel/uploadExcel"); excelService.uploadExcel01(file); // excelService.uploadExcel02(file); } }
业务层代码:
package cn.mindgd.service; import cn.mindgd.util.ExcelUtils; import org.apache.poi.hssf.usermodel.HSSFWorkbook; import org.apache.poi.poifs.filesystem.POIFSFileSystem; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.xssf.usermodel.XSSFWorkbook; import org.springframework.stereotype.Service; import org.springframework.web.multipart.MultipartFile; import java.io.IOException; import java.util.List; /** * @author JiaXinMa * @description Excel测试业务层 * @date 2021/7/22 */ @Service public class ExcelService { /** * @author: JiaXinMa * @description: 上传excel文件同时写入数据库 * @date: 2021/7/22 */ public void uploadExcel01(MultipartFile file) { try { //1.获取文件并读取数据 //判断是否为excel String originalFilename = file.getOriginalFilename(); boolean isExcel = ExcelUtils.validateExcel(originalFilename); if (isExcel) { /* 不管2003 .xls还是2007 .xlsx 都是 * 用 new XSSFWorkbook(file.getInputStream())将MultipartFile文件转为Workbook文件 */ Workbook workbook = new XSSFWorkbook(file.getInputStream());//情况1
//情况3 // Workbook workbook = new HSSFWorkbook(new POIFSFileSystem(file.getInputStream())); List<List<String>> uploadExcelData = getUploadExcelData(workbook); System.out.println("读取的文件数据为:" + uploadExcelData); //2.赋值对象并插入数据,每一行就是条数据 } } catch (Exception e) { e.printStackTrace(); } } /** * @author: JiaXinMa * @description: 上传excel文件同时写入数据库 * @date: 2021/7/22 */ public void uploadExcel02(MultipartFile file) { try { //1.获取文件并读取数据 //判断是否为excel String originalFilename = file.getOriginalFilename(); boolean isExcel = ExcelUtils.validateExcel(originalFilename); boolean isExcel2003 = ExcelUtils.isExcel2003(originalFilename); boolean isExcel2007 = ExcelUtils.isExcel2007(originalFilename); if (isExcel) { Workbook workbook = null; /* 不管2003 .xls还是2007 .xlsx 都是 * 用 new XSSFWorkbook(file.getInputStream())将MultipartFile文件转为Workbook文件 */ if (isExcel2003) {//情况2 workbook = new HSSFWorkbook(file.getInputStream()); } else if (isExcel2007) { workbook = new XSSFWorkbook(file.getInputStream()); } List<List<String>> uploadExcelData = getUploadExcelData(workbook); System.out.println("读取的文件数据为:" + uploadExcelData); //2.赋值对象并插入数据,每一行就是条数据 } } catch (Exception e) { e.printStackTrace(); } } /** * @author: JiaXinMa * @description: 获取上传的Excel文件的数据 * @date: 2021/7/22 */ public List<List<String>> getUploadExcelData(Workbook workbook) throws Exception { ExcelUtils excelUtils = new ExcelUtils(workbook); List<List<String>> list = excelUtils.read(); return list; } }
demo中的工具类可以看我这篇博客:如何使用POI下载、导出Excel模板以及设置样式?
测试后效果:
情况2和3都是保证错误:
情况1:
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