代码是参考某个大神的文章，这里记录一下

controller层

/**
     * 动态导入check
     */
    @PostMapping("toExportInt")
    public void toExceptInt(MultipartFile file){
        List<Map<String,String>> list = EasyExcelImportUtils.makeData(file);

    }

工具类

package com.hginfo.hbm.utils;

import com.alibaba.excel.EasyExcelFactory;
import com.alibaba.excel.util.IoUtils;
import com.hginfo.hbm.listener.EasyExcelListener;
import org.apache.commons.compress.utils.Lists;
import org.springframework.util.CollectionUtils;
import org.springframework.web.multipart.MultipartFile;
 
import java.io.*;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
 
/**
 */
public class EasyExcelImportUtils {
 
 
    /**
     * 动态获取全部列和数据体
     * [stream, parseRowNumber]
     * @return {@link List< Map< String, String>>}
     * @throws
     */
    public static List<Map<String,String>> parseExcelToData(byte[] stream, Integer parseRowNumber) {
        EasyExcelListener readListener = new EasyExcelListener();
        EasyExcelFactory.read(new ByteArrayInputStream(stream)).registerReadListener(readListener).headRowNumber(parseRowNumber).sheet(0).doRead();
        List<Map<Integer, String>> headList = readListener.getHeadList();
        if(CollectionUtils.isEmpty(headList)){
            throw new RuntimeException("Excel表头不能为空");
        }
        List<Map<Integer, String>> dataList = readListener.getDataList();
        if(CollectionUtils.isEmpty(dataList)){
            throw new RuntimeException("Excel数据内容不能为空");
        }
        //获取头部,取最后一次解析的列头数据
        Map<Integer, String> excelHeadIdxNameMap = headList.get(headList.size() -1);
        //封装数据体
        List<Map<String,String>> excelDataList = Lists.newArrayList();
        for (Map<Integer, String> dataRow : dataList) {
            Map<String,String> rowData = new LinkedHashMap<>();
            excelHeadIdxNameMap.entrySet().forEach(columnHead -> {
                rowData.put(columnHead.getValue(), dataRow.get(columnHead.getKey()));
            });
            excelDataList.add(rowData);
        }
        return excelDataList;
    }
 
    /**
     * 返回导入的所有数据
     * [file]
     * @return {@link List< Map< String, String>>}
     * @throws
     */
    public static List<Map<String,String>> makeData(MultipartFile file){
        InputStream inputStream = null;//转换成输入流
        try {
            inputStream = file.getInputStream();
        } catch (IOException e) {
            e.printStackTrace();
        }
        byte[] stream = new byte[0];
        try {
            stream = IoUtils.toByteArray(inputStream);
        } catch (IOException e) {
            e.printStackTrace();
        }
        if(stream == null || stream.length == 0){
            return null;
        }
        List<Map<String,String>> dataList = parseExcelToData(stream, 1);//从动态获取全部列和数据体，默认从第一行开始解析数据
        try {
            if(inputStream != null){
                inputStream.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return dataList;
    }
 
 
    /**
     * 文件导入测试
     * @param args
     * @throws IOException
     */
    public static void main(String[] args) throws IOException {
        //属性项
        FileInputStream inputStream = new FileInputStream(new File("C:\\Users\\HG\\Desktop\\template.xlsx"));
        byte[] stream = IoUtils.toByteArray(inputStream);
        List<Map<String,String>> dataList = parseExcelToData(stream, 1);//动态获取全部列和数据体，默认从第一行开始解析数据
        List<String> objects = new ArrayList<>();
        dataList.forEach(d->{
            objects.addAll(d.keySet());
        });
        System.out.println("属性项:"+objects);
        System.out.println("值:"+dataList);
        inputStream.close();
    }
}

监听类

package com.hginfo.hbm.listener;

import com.alibaba.excel.context.AnalysisContext;
import com.alibaba.excel.event.AnalysisEventListener;
 
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
 
/**
 */
public class EasyExcelListener extends AnalysisEventListener<Map<Integer, String>> {
    //表头数据（存储所有的表头数据）
    private List<Map<Integer, String>> headList = new ArrayList<>();
    //数据体
    private List<Map<Integer, String>> dataList = new ArrayList<>();
    //这里会一行行的返回头
    @Override
    public void invokeHeadMap(Map<Integer, String> headMap, AnalysisContext context) {
        //存储全部表头数据
        headList.add(headMap);
    }
    @Override
    public void invoke(Map<Integer, String> data, AnalysisContext context) {
        dataList.add(data);
    }
    @Override
    public void doAfterAllAnalysed(AnalysisContext context) {
    }
    public List<Map<Integer, String>> getHeadList() {
        return headList;
    }
    public List<Map<Integer, String>> getDataList() {
        return dataList;
    }
 
}
 

引入pom文件

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>easyexcel</artifactId>
        </dependency>