Java中EasyPoi导出复杂合并单元格的方法

上星期做了一个Excel的单元格合并，用的是EasyPoi，我之前合并单元格都是原生的，第一次使用EasyPoi合并也不太熟悉，看着网上自己套用，使用后发现比原生的方便些，贡献一下，也给其他用到合并而且用的是EasyPoi的小伙伴节省下时间。

版本号，自己来定，可以去官网查看：EasyPoi官网

<!-- easypoi 导入包 --> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-base</artifactId> <version>4.0.0</version> </dependency> <dependency> <groupId>cn.afterturn</groupId> <artifactId>easypoi-annotation</artifactId> <version>4.0.0</version> </dependency>实现代码：

//表头设置List<ExcelExportEntity> colList = new ArrayList<ExcelExportEntity>();ExcelExportEntity colEntity = new ExcelExportEntity('经销商', 'distributorName');colEntity.setNeedMerge(true);colEntity.setWidth(20);colList.add(colEntity);colEntity = new ExcelExportEntity('科室', 'dept');colEntity.setNeedMerge(true);colList.add(colEntity);colEntity = new ExcelExportEntity('部门', 'region');colEntity.setNeedMerge(true);colList.add(colEntity);colEntity = new ExcelExportEntity('省份', 'province');colEntity.setNeedMerge(true);colList.add(colEntity);colEntity = new ExcelExportEntity('门店数量', 'storeNum');colEntity.setNeedMerge(true);colEntity.setStatistics(true);colList.add(colEntity);Map<String, Integer> map = DateUtils.getLastDayOfMonthByStr(request.getMonthStr());Integer dayNum = map.get('dayNum');for (int i = 1; i <= dayNum; i++) { ExcelExportEntity group_1 = new ExcelExportEntity(i + '日', 'day'); List<ExcelExportEntity> exportEntities = new ArrayList<>(); ExcelExportEntity appalyExcel = new ExcelExportEntity('申请数量', 'applyNum' + i); appalyExcel.setStatistics(true); exportEntities.add(appalyExcel); ExcelExportEntity adoptExcel = new ExcelExportEntity('通过数量', 'adoptNum' + i); adoptExcel.setStatistics(true); exportEntities.add(adoptExcel); group_1.setList(exportEntities); colList.add(group_1);}//文件数据List<Map<String, Object>> list = new ArrayList<>();List<StoreNewAddReportVO.DistributorStoreNewAddReportVO> disList = register.getStoreNewAddReportVO().getDistributorStoreNewAddReportVOList();int size = disList.size();for (int i = 0; i < size; i++) { StoreNewAddReportVO.DistributorStoreNewAddReportVO dis = disList.get(i); Map<String, Object> valMap = new HashMap<>(); valMap.put('distributorName', dis.getDistributorName()); valMap.put('dept', dis.getDept()); valMap.put('region', dis.getRegion()); valMap.put('province', dis.getProvince()); valMap.put('storeNum', dis.getStoreNum()); List<StoreNewAddReportVO.dayData> dayDataList = dis.getDayDataList(); Map<String, List<StoreNewAddReportVO.dayData>> collectMap = Maps.newHashMap(); if (CollectionUtils.isNotEmpty(dayDataList)) { collectMap = dayDataList.stream().collect(Collectors.groupingBy(StoreNewAddReportVO.dayData::getDayStr)); } List<Map<String, Object>> list_1 = new ArrayList<>(); Map<String, Object> valMap_1 = new HashMap<>(); for (int j = 1; j <= dayNum; j++) { List<StoreNewAddReportVO.dayData> dayData = collectMap.get(String.valueOf(j)); int applyflag = 0; int adoptflag = 0; if (CollectionUtils.isNotEmpty(dayData)) { applyflag = dayData.get(0).getApplyNum(); adoptflag = dayData.get(0).getAdoptNum(); } valMap_1.put('applyNum' + j, applyflag); valMap_1.put('adoptNum' + j, adoptflag); } list_1.add(valMap_1); valMap.put('day', list_1); list.add(valMap);}//导出Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams('【' + request.getMonthStr() + '】门店注册日明细数据', '数据'), colList, list);Sheet sheet = workbook.getSheet('数据');Row row = sheet.getRow(sheet.getLastRowNum());Cell cell = row.getCell(0);cell.setCellValue('总计');CellStyle cellStyle = workbook.createCellStyle();cellStyle.setAlignment(HorizontalAlignment.CENTER);//水平居中cellStyle.setVerticalAlignment(VerticalAlignment.CENTER);//垂直居中Font font = workbook.createFont();font.setFontHeightInPoints((short) 15);font.setFontName('Trebuchet MS');cellStyle.setFont(font);cell.setCellStyle(cellStyle);CellRangeAddress range_0 = new CellRangeAddress(sheet.getLastRowNum(), sheet.getLastRowNum(), 0, 3);sheet.addMergedRegion(range_0);File file = new File('D:'.concat(UUID.randomUUID().toString().concat('.xls'))); FileOutputStream fileOutputStream = null; try { fileOutputStream = new FileOutputStream(file); workbook.write(fileOutputStream); } catch (Exception e) { log.error('门店注册日workbook写入到文件中失败，错误信息：{}', ExceptionUtils.getStackTrace(e)); } finally { if (null != fileOutputStream) {try { fileOutputStream.close();} catch (IOException e) { //skip} } }

具体的API细节就不介绍了可以去官网，关键在于ExcelExportEntity 这个类，它是以map形式展现的，创建的时候设置key，设置value的根据key进行设置，上面一些StoreNewAddReportVO还有其他是我的业务类， 到时候可以替换掉。

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