1 列表List<Map<String,Object>> list 按类型分模块分别导出到各自sheet

2 首先获取列表

List<Map<String,Object>> list = tzBusiTaskUserListService.getTaskUserList(tzBusiTaskUserList);

3 分组

Map<String,List<Map<String,Object>>> map = list.stream().collect(Collectors.groupingBy(o->o.get("T_TASK_NAME").toString()));

4.获取表头，这里自定义表头我是自己配置到数据库的，List<T> 实体或者map都可以

List<Map<String,Object>> listColumn = tzBusiTaskListService.getTaskUserColumns();
Map<String,List<Map<String,Object>>> mapColumn = listColumn.stream().collect(Collectors.groupingBy(o->o.get("FORM_NAME").toString()));

5接下来就是导出

ExcelWriter excelWriter = null;
//  设置内容格式 以及 编码方式（文件指定可以修改）
response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
response.setCharacterEncoding("utf-8");
// 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系
String fileName = URLEncoder.encode("人员任务列表数据"+System.currentTimeMillis(), "UTF-8").replaceAll("\\+", "%20");
//attachment指定独立文件下载  不指定则回浏览器中直接打开
response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");//输出文件流  调用服务层方法，获取excel对象放入输出流

excelWriter = EasyExcel.write(response.getOutputStream()).build();
int i = 0;

最后：完整代码

   //导出excel/*** 输出多个sheet,自定义表头** @param response 输出多excel表格，让用户下载*/@PostMapping("/exportSheetsWithHeaders")public void exportSheetsWithHeaders(HttpServletResponse response) throws Exception{ExcelWriter excelWriter = null;try{//  设置内容格式 以及 编码方式（文件指定可以修改）response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");response.setCharacterEncoding("utf-8");// 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系String fileName = URLEncoder.encode("人员任务列表数据"+System.currentTimeMillis(), "UTF-8").replaceAll("\\+", "%20");//attachment指定独立文件下载  不指定则回浏览器中直接打开response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");//输出文件流  调用服务层方法，获取excel对象放入输出流TzBusiTaskUserList tzBusiTaskUserList = new TzBusiTaskUserList();//            List<TzBusiTaskUserList> list = tzBusiTaskUserListService.selectAll(tzBusiTaskUserList);List<Map<String,Object>> list = tzBusiTaskUserListService.getTaskUserList(tzBusiTaskUserList);if(list.isEmpty()){response.reset();response.setContentType("application/json");response.setCharacterEncoding("utf-8");response.getWriter().println(JSON.toJSONString(ApiResp.fail("无数据")));return;}Map<String,List<Map<String,Object>>> map = list.stream().collect(Collectors.groupingBy(o->o.get("T_TASK_NAME").toString()));List<Map<String,Object>> listColumn = tzBusiTaskListService.getTaskUserColumns();Map<String,List<Map<String,Object>>> mapColumn = listColumn.stream().collect(Collectors.groupingBy(o->o.get("FORM_NAME").toString()));if(listColumn.isEmpty()) {response.reset();response.setContentType("application/json");response.setCharacterEncoding("utf-8");response.getWriter().println(JSON.toJSONString(ApiResp.fail("字段为空")));return;}excelWriter = EasyExcel.write(response.getOutputStream()).build();int i = 0;for (String key:map.keySet()) {if(mapColumn.get(key) == null || mapColumn.get(key).get(0).get("ORA_FIELDS") ==null) continue;String columns = "T_TASK_NAME,T_TASK_TYPE,T_START_TIME,T_END_TIME,"+mapColumn.get(key).get(0).get("ORA_FIELDS").toString()+",CREATE_USER,CREATE_USER_NAME,CREATE_PHONE,CREATE_TIME,CREATE_COUNTY,CREATE_GRID";String headers = "任务名称,任务周期,任务开始时间,任务结束时间,"+mapColumn.get(key).get(0).get("TITLES").toString()+",上报人工号,上报人姓名,上报人电话,上报时间,上报人县市,上报人网格";List<Map<String,Object>> val = map.get(key);List<List<String>> headList = EasyExcelUtil.headList(headers);List<List<Object>> dataList =  EasyExcelUtil.dataList(val,columns);if(dataList.isEmpty()) continue;WriteTable writeTable = new WriteTable();writeTable.setHead(headList);WriteSheet writeSheet = EasyExcel.writerSheet(i,key).build();excelWriter.write(dataList, writeSheet,writeTable);i++;}}catch (Exception e) {// 重置responselog.error("异常",e);response.reset();response.setContentType("application/json");response.setCharacterEncoding("utf-8");response.getWriter().println(JSON.toJSONString(ApiResp.fail("下载失败",e.getMessage())));}finally {//关闭流if(excelWriter != null){excelWriter.finish();}}}