Easy Excel合并单元格情况简单导入导出

需求

实现报表数据的导入导出，表格中部分数据是系统生成，部分数据是甲方填写，录入系统。

批号唯一

Maven

<dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>3.3.2</version></dependency>

导出

看到网上都是创建自定义WriteHandler。略麻烦，可以用注解实现。

导出Bean，（bean就不给全了，涉及工艺），合并的单元格是列9，列10

@Data
@ContentStyle(horizontalAlignment = HorizontalAlignmentEnum.CENTER,verticalAlignment = VerticalAlignmentEnum.CENTER)
@NoArgsConstructor
@AllArgsConstructor
public class ProductOne {@ContentLoopMerge(eachRow = 2)@ExcelProperty(value = {"批号", "批号", "批号", "批号"},index = 0)@ColumnWidth(20)private String column1;@ContentLoopMerge(eachRow = 2)@ExcelProperty(value = {"API放行标准", "API放行标准", "API放行标准", "API放行标准"},index = 1)private String column2;@ContentLoopMerge(eachRow = 2)@ExcelProperty(value = {"盘库月份", "盘库月份", "盘库月份", "盘库月份"},index = 2)private String column3;@ContentLoopMerge(eachRow = 2)@ExcelProperty(value = {"生产进度", "生产进度", "生产进度", "生产进度"},index = 3)private String column4;@ContentLoopMerge(eachRow = 2)@ExcelProperty(value = {"生产偏差/变更", "生产偏差/变更", "生产偏差/变更", "生产偏差/变更"},index = 4)private String column5;@ContentLoopMerge(eachRow = 2)@ExcelProperty(value = {"成品入库数量/kg", "成品入库数量/kg", "成品入库数量/kg", "成品入库数量/kg"},index = 5)private String column6;@ContentLoopMerge(eachRow = 2)@ExcelProperty(value = {"投料开始时间", "投料开始时间", "投料开始时间", "投料开始时间"},index = 6)private String column7;@ContentLoopMerge(eachRow = 2)@ExcelProperty(value = {"工序1：溶解脱色", "投料", "粗品数量（kg）", "M"},index = 7)private String column8;@ExcelProperty(value = {"工序1：溶解脱色", "投料", "精品二次结晶物数量（kg）", "/"},index = 8)private String column9;@ExcelProperty(value = {"工序1：溶解脱色", "投料", "精品二次结晶物批号", " / "},index = 9)@ColumnWidth(20)private String column10;public ProductOne(ReportProductOne bean) {this.column1 = bean.getColumn1();this.column2 = bean.getColumn2();this.column3 = bean.getColumn3();this.column4 = bean.getColumn4();this.column5 = bean.getColumn5();this.column6 = bean.getColumn6();this.column7 = bean.getColumn7();this.column8 = bean.getColumn8();this.column9 = bean.getColumn9One();this.column10 = bean.getColumn10One();}

@ContentLoopMerge(eachRow = 2) ，此注解每2行合并。loop可循环。

@OnceAbsoluteMerge 用于合并一次

下图中每个注解都非常好用

@ContentStyle ，用于正文样式，我这边上下左右都居中

数据库中，存储对象bean

public class ReportProductOne extends Model<ReportProductOne> {@TableId(type = IdType.AUTO)private Integer id;private String column1;private String column2;private String column3;private String column4;private String column5;private String column6;private String column7;private String column8;private String column9One;private String column9Two;private String column10One;private String column10Two;private Date createTime;public ReportProductOne(ProductOne productOne, String column9, String column10) {this.column1 = productOne.getColumn1();this.column2 = productOne.getColumn2();this.column3 = productOne.getColumn3();this.column4 = productOne.getColumn4();this.column5 = productOne.getColumn5();this.column6 = productOne.getColumn6();this.column7 = productOne.getColumn7();this.column8 = productOne.getColumn8();this.column9One = productOne.getColumn9();this.column10One = productOne.getColumn10();this.column9Two = column9;this.column10Two = column10;}

由此可以看出，对于批号，列9，列10。拆分的单元格也是一对一关系。

导出Controller

    @Operation(summary = "导出")@GetMapping("export2")public void export2(HttpServletResponse response) {List<ReportProductOne> list = reportProductOneService.list();List<ProductOne> result = new ArrayList<>(32);for (ReportProductOne reportProductOne : list) {ProductOne bean1 = new ProductOne(reportProductOne);ProductOne bean2 = BeanUtil.copyProperties(bean1, ProductOne.class);bean2.setColumn9(reportProductOne.getColumn9Two());bean2.setColumn10(reportProductOne.getColumn10Two());result.add(bean1);result.add(bean2);}try {response.setContentType("application/vnd.ms-excel");response.setCharacterEncoding("utf-8");response.setHeader("Content-disposition", "attachment;filename=test.xlsx");EasyExcel.write(response.getOutputStream(), ProductOne.class).autoCloseStream(Boolean.FALSE).sheet("Sheet 0").doWrite(result);} catch (IOException e) {e.printStackTrace();}}

以上bean2，其实也可以new一个，然后set列9 和列10。在导出的情况下根本没有区别，但是导入的时候会有。

导入

导入demo

导入Controller

    @Operation(summary = "批量导入")@PostMapping("import")public R userBatchImport(MultipartFile file){String originalFilename = file.getOriginalFilename();String suffixName = originalFilename.substring(originalFilename.lastIndexOf("."));if(!AuthConstant.SUFFIX_FILE_NAME.equals(suffixName)){return failed("文件格式不符合");}try {EasyExcel.read(file.getInputStream(),ProductOne.class,productOneImportBatchListener).headRowNumber(4).sheet().doRead();} catch (Exception e) {productOneImportBatchListener.clear();return failed(e.getMessage());}return success("success");}

ReadListener

public class ProductOneImportBatchListener extends AnalysisEventListener<ProductOne> {List<ProductOne> cache = new ArrayList<>(16);@Overridepublic void invoke(ProductOne bean, AnalysisContext analysisContext) {if(cache.size() % 2 == 0 && StrUtil.isEmpty(bean.getColumn1())) {throw new ExcelAnalysisException("批号必填或格式有误");}if(cache.size() % 2 == 0) {//判断批号是否存在，不存在throw}System.out.println(bean);cache.add(bean);}@Overridepublic void doAfterAllAnalysed(AnalysisContext analysisContext) {if(cache.size() % 2 != 0) {throw new ExcelAnalysisException("文档格式有误");}List<ReportProductOne> list = new ArrayList<>(32);//奇数行，都有批号for (int i = 0; i < cache.size(); i+=2) {ReportProductOne temp = new ReportProductOne(cache.get(i),cache.get(i+1).getColumn9(),cache.get(i+1).getColumn10());list.add(temp);}log.info("插入完成：共"+ list.size()+"条");clear();}public void clear(){cache.clear();}
}

解析数据