element ui 文件上传模板

<template>
  <div>
    <el-upload
      class="image-uploader"
      :multiple="false"
      :auto-upload="true"
      list-type="text"
      :show-file-list="true"
      :before-upload="beforeUpload"
      :drag="true"
      action
      :limit="1"
      :on-exceed="handleExceed"
      :http-request="uploadFile"
    >
      <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">一次只能上传一个文件，仅限text格式，单文件不超过1MB</div>
    </el-upload>
  </div>
</template>

<script>
import upload from '@/api/upload'
export default {
  data() {
    return {
      test: 123
    };
  },
  methods: {
    beforeUpload(file) {
      console.log("beforeUpload");
      console.log(file.type);
      // Text文件格式
      // const isText = file.type === "application/vnd.ms-excel";
      //Excel 文件格式
      const isTextComputer =
        file.type ===
        "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet";
        if(!isTextComputer){
          this.$message.warning(`只能上传excel格式文件`);
        }
        return isTextComputer
      // return isText | isTextComputer;
    },
    // 上传文件个数超过定义的数量
    handleExceed(files, fileList) {
      this.$message.warning(`当前限制选择 1 个文件，请删除后继续上传`);
    },
    // 上传文件
    uploadFile(item) {
      console.log(item);
      const fileObj = item.file;
      console.log(fileObj)
      // FormData 对象
      const form = new FormData();
      // 文件对象
      form.append("file", fileObj);
      upload.excel(form).then(res=>{
        console.log(res)
        if (res === "success"){
          this.$message.success(`上传成功`);
        }
      })
    }
  }
};
</script>

<style lang="scss" scoped>
</style>

package com.gpdi.springbootshirojwt.controller;

import com.gpdi.springbootshirojwt.config.R;
import com.gpdi.springbootshirojwt.utils.ExcelUtils;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.multipart.MultipartFile;

import java.io.IOException;
import java.io.InputStream;
import java.util.List;

/**
 * @Description:
 * @Author: Lxq
 * @Date: 2019/12/22 9:29
 */
@RestController
@RequestMapping("/api")
public class TestController {

    @PostMapping("/uploadExcel")
    public R userLogout(@RequestParam(value = "file")MultipartFile file) throws IOException {
        System.out.println(file.getName());
        System.out.println(file.getOriginalFilename());
        System.out.println(file.getContentType());
        System.out.println(file.getSize());
        InputStream inputStream = file.getInputStream();
        List<Object> objects = ExcelUtils.readLessThan1000RowBySheetAndStream(inputStream, null);
        System.out.println(objects);
        return R.ok("success");
    }
}