EsayExcel读

引入依赖

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>easyexcel</artifactId>
    <version>3.0.1</version>
</dependency>

private List<Map<String, String>> excelToListMap(MultipartFile file) {
     //返回值
        List<Map<String,String>> excelList = new ArrayList<>();  
     //表头
        Map<Integer,String> headMapShow = new HashMap<>();
        int count=0;
        try {
            EasyExcel.read(file.getInputStream())
                    .sheet()
                    .registerReadListener(new AnalysisEventListener<Map<Integer,String>>() {
                        @Override
                        public void invoke(Map<Integer, String> integerStringMap, AnalysisContext analysisContext) {
                //这个是每读取一行执行一次的,在invokeHeader之后执行,读取的行数据会生成一个Map,key值是列,value值数据
                            Map<String,String> plan = new LinkedHashMap<>();
                            for (int i=0; i< headMapShow.size(); i++) {
                                plan.put(headMapShow.get(i),integerStringMap.get(i));
                            }
                            excelList.add(plan);
                        }

                        @Override
                        public void invokeHeadMap(Map<Integer, String> headMap, AnalysisContext context) {
                //这里是先执行的,会返回一个表头的Map,key值是列,value值是表头
                            super.invokeHeadMap(headMap, context);
                            headMapShow.putAll(headMap);
                        }

                        @Override
                        public void doAfterAllAnalysed(AnalysisContext analysisContext) {
                //这里是读取完全部列的时候执行的
                        }
                    })
                    .doRead();

        } catch (IOException e) {
            e.printStackTrace();
        }
        return excelList;
    }

 

posted @ 2022-04-28 14:11  代码羡  阅读(84)  评论(0编辑  收藏  举报