1.前端elementui代码

 <el-upload
                class="upload-demo"
                drag
                name="excelFile"
                :data="postParm"
                :on-error="uploadFalse"
                :on-success="uploadSuccess"
                :before-upload="beforeAvatarUpload"
                action="api/mes/equment/uploadExcel"
                multiple>
                <i class="el-icon-upload"></i>
                <div class="el-upload__text">将文件拖到此处，或<em>点击上传</em></div>
                <div class="el-upload__tip" slot="tip">只能上传xlsx/xls文件，且不超过500kb</div>
            </el-upload>

 uploadFalse(response, file, fileList) {
            alert("文件上传失败！");
        },
        uploadSuccess(response, file, fileList) {
            console.log('response',response);
            //文件导入成功
            if (response.code ===  "0") {
                this.$message.success(response.msg);
                this.open1= false;
                this.getData();
            }else {
                this.$message.success(response.msg);
                this.open1 = false;
            }

        },
        // 上传前对文件的大小的判断
        beforeAvatarUpload(file) {
            const extension = file.name.split(".")[1] === "xls";
            const extension2 = file.name.split(".")[1] === "xlsx";
            const extension3 = file.name.split(".")[1] === "doc";
            const extension4 = file.name.split(".")[1] === "docx";
            const isLt2M = file.size / 1024 / 1024 < 10;
            if (!extension && !extension2 && !extension3 && !extension4) {
                alert("上传模板只能是 xls、xlsx、doc、docx 格式!");
            }
            if (!isLt2M) {
                console.log("上传模板大小不能超过 10MB!");
            }
            return extension || extension2 || extension3 || (extension4 && isLt2M);
        }

data() {
        return {
            //批量弹出框
            open1: false,

            fileList: [],
            postParm:{
                businessName: "设备excel"
            }
        };
    },

2.后台java代码

@RequestMapping(value = "/uploadExcel", method = RequestMethod.POST)
    @ResponseBody
    public Result uploadExcel( @RequestParam("excelFile") MultipartFile excelFile,
                               @RequestParam(value = "businessName",required = true) String businessName
                            ) throws IOException {
        try{

            String name = excelFile.getOriginalFilename();
            if(name.length()<6 || !name.substring(name.length()-5).equals(".xlsx")) {
                return Result.failure(ResponseCode.ERROR_999, "文件格式错误");
            }

            List<Map<String,Object>> listMap = new ArrayList<Map<String,Object>>();
            listMap = ExcelUtils.excelToShopIdList(excelFile.getInputStream());
            System.out.println(listMap.size());

            for (Map<String, Object> m : listMap)
            {
                entity = new equmentEntity();
                entity.setEquSN(m.get("c0").toString());
                entity.setEquName(m.get("c1").toString());
                service.add(entity);
            }

           /*

                              @RequestParam(value = "businessStatus",required = true) Integer businessStatus,
                              @RequestParam(value = "businessType",required = true) Integer businessType
          ,
           */

            return Result.success("导出成功");
        }catch (Exception ex){
            System.out.println(ex.getMessage());
            return Result.failure(ResponseCode.SUCCESS, ResponseMsg.QUERY_ERROR);
        }
    }

 

package com.ry.bill.sys.utils;

import org.apache.commons.lang3.StringUtils;
import org.apache.poi.ss.usermodel.*;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.InputStream;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class ExcelUtils {
    private static final Logger LOGGER = LoggerFactory.getLogger(ExcelUtils.class);

    public static List<Map<String,Object>> excelToShopIdList(InputStream inputStream) {

        List<Map<String,Object>> listMap = new ArrayList<Map<String,Object>>();
        Map<String,Object> map=new HashMap<String,Object>();


        List list = new ArrayList<>();
        Workbook workbook = null;
        try {
            workbook = WorkbookFactory.create(inputStream);
            inputStream.close();
            //工作表对象
            Sheet sheet = workbook.getSheetAt(0);
            //总行数
            int rowLength = sheet.getLastRowNum() + 1;
            //工作表的列
            Row row = sheet.getRow(0);
            //总列数
            int colLength = row.getLastCellNum();
            //得到指定的单元格
            Cell cell = row.getCell(0);

            for (int i = 1; i < rowLength; i++) {
                row = sheet.getRow(i);
                for (int j = 0; j < colLength; j++) {
                    cell = row.getCell(j);
                    if (cell != null) {
                        cell.setCellType(Cell.CELL_TYPE_STRING);
                        String data = cell.getStringCellValue();

                        map.put("c"+j,data);


                        System.out.println(data);
                        data = data.trim();
                       // if (StringUtils.isNumeric(data))
                            //list.add(data);
                    }
                }
                listMap.add(map);
            }


        } catch (Exception e) {
            LOGGER.error("parse excel file error :", e);
        }
        return listMap;//shopIds;
    }
}