springboot+maven+easyexcel 动态导入数据(无实体)

maven依赖

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>easyexcel</artifactId>
            <version>3.0.5</version>
        </dependency>

导入攻工具类

public class DynamicEasyExcelListener 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
     *
     * @param headMap
     * @param context
     */
    @Override
    public void invokeHeadMap(Map<Integer, String> headMap, AnalysisContext context) {
        //存储全部表头数据
        headList.add(headMap);
    }
    /**
     * 这个每一条数据解析都会来调用
     *
     * @param data
     * @param context
     */
    @Override
    public void invoke(Map<Integer, String> data, AnalysisContext context) {
        dataList.add(data);
    }
    /**
     * 所有数据解析完成了 都会来调用
     *
     * @param context
     */
    @Override
    public void doAfterAllAnalysed(AnalysisContext context) {
        // 这里也要保存数据，确保最后遗留的数据也存储到数据库
    }
    public List<Map<Integer, String>> getHeadList() {
        return headList;
    }
    public List<Map<Integer, String>> getDataList() {
        return dataList;
    }

测试类

public class DynamicEasyExcelImportUtils {
    /**
     * 动态获取全部列和数据体，默认从第一行开始解析数据
     * @param stream
     * @return
     */
    public static List<Map<String,String>> parseExcelToView(byte[] stream) {
        return parseExcelToView(stream, 1);
    }
    /**
     * 动态获取全部列和数据体
     * @param stream           excel文件流
     * @param parseRowNumber   指定读取行
     * @return
     */
    public static List<Map<String,String>> parseExcelToView(byte[] stream, Integer parseRowNumber) {
        DynamicEasyExcelListener readListener = new DynamicEasyExcelListener();
        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未包含表头");
        }
        List<Map<Integer, String>> dataList = readListener.getDataList();
        if(CollectionUtils.isEmpty(dataList)){
            throw new RuntimeException("Excel未包含数据");
        }
        //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;
    }
    /**
     * 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("文件路径"));
        byte[] stream = IoUtils.toByteArray(inputStream);
        List<Map<String,String>> dataList = parseExcelToView(stream, 3);
        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();
    }