org.apache.poi
      poi
      3.17
    
    
      org.apache.poi
      poi-ooxml
      3.17
    
 

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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.web.multipart.MultipartFile;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.HashMap;
import java.util.Map;
public class OfficeUtils {
  protected static final Logger logger = LoggerFactory.getLogger(OfficeUtils.class);
  public static Map> readExcelContentz(MultipartFile file) throws Exception {
    Map> content = new HashMap>();
    // 上传文件名
    Workbook wb = getWb(file);
    if (wb == null) {
      throw new BusinessException(ErrorType.WORK_BOOK_EMPTY);
    }
    Sheet sheet = wb.getSheetAt(0);
    // 得到总行数
    int rowNum = sheet.getLastRowNum();
    Row row = sheet.getRow(0);
    int colNum = row.getPhysicalNumberOfCells();
    // 正文内容应该从第二行开始,第一行为表头的标题
    for (int i = 1; i <= rowNum; i++) {
      row = sheet.getRow(i);
      int j = 0;
      Map cellValue = new HashMap();
      while (j < colNum) {
        Object obj = getCellFormatValue(row.getCell(j));
        cellValue.put(j, obj);
        j++;
      }
      content.put(i, cellValue);
    }
    return content;
  }
  //根据Cell类型设置数据
  private static Object getCellFormatValue(Cell cell) {
    Object cellvalue = "";
    if (cell != null) {
      switch (cell.getCellTypeEnum()) {
        case NUMERIC:
          cellvalue = String.valueOf(cell.getNumericCellValue());
          break;
        case FORMULA: {
          cellvalue = cell.getDateCellValue();
          break;
        }
        case STRING:
          cellvalue = cell.getRichStringCellValue().getString();
          break;
        default:
          cellvalue = "";
      }
    } else {
      cellvalue = "";
    }
    return cellvalue;
  }
  private static Workbook getWb(MultipartFile mf) {
    String filepath = mf.getOriginalFilename();
    String ext = filepath.substring(filepath.lastIndexOf("."));
    Workbook wb = null;
    try {
      InputStream is = mf.getInputStream();
      if (".xls".equals(ext)) {
        wb = new HSSFWorkbook(is);
      } else if (".xlsx".equals(ext)) {
        wb = new XSSFWorkbook(is);
      } else {
        wb = null;
      }
    } catch (FileNotFoundException e) {
      logger.error("FileNotFoundException", e);
    } catch (IOException e) {
      logger.error("IOException", e);
    }
    return wb;
  }
}

public Map> addCustomerInfo(MultipartFile file) {
  Map> map = new HashMap<>();
  try {
    map = ReadExcelUtil.readExcelContentz(file);
  } catch (Exception e) {
    e.printStackTrace();
  }
  //excel数据存在map里，map.get(0).get(0)为excel第1行第1列的值，此处可对数据进行处理
}

@PostMapping
public String add(@RequestParam("file")MultipartFile file){
  Map> map = customerService.addCustomerInfo(file);
  return "success";
}