首先引入相关依赖

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

工具类

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;  }}

service层

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}

controller层

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