EXCEL上传指定行读取数据 可直接使用

前提：需要引入easyExcel

EXCEL上传指定行读取数据

前置条件

entity

@Data
	@AllArgsConstructor
	@NoArgsConstructor
	@Builder
	public static class ProductImportReq{
		@ExcelProperty(value = "外部商品编码",index = 0)
		@ApiModelProperty(value="外部产品编码")
		private String externalProductCode;

		@ExcelProperty(value = "商品编码",index = 1)
		@ApiModelProperty(value = "商品编码")
		private String productCode;
		/**
		 * 产品名称
		 */
		@ExcelProperty(value = "商品名称",index = 2)
		@ApiModelProperty(value = "产品名称")
		private String productName;


		@NotNull(message = "是否标品")
		@ExcelProperty(value = "是否标品",converter = IntegerConverter.class,index = 3)
		@ApiModelProperty(value = "是否标准品0 否  1是")
		private Integer isStandard;}

中文数字转换器

public class IntegerConverter implements Converter {
	@Override
	public Class supportJavaTypeKey() {
		return Integer.class;
	}

	@Override
	public CellDataTypeEnum supportExcelTypeKey() {
		return CellDataTypeEnum.STRING;
	}

	@Override
	public Integer convertToJavaData(ReadCellData cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
		Integer result=null==cellData.getStringValue()?null:"是".equals(cellData.getStringValue()) ? 1 : 0;
		return result;
	}

	@Override
	public WriteCellData convertToExcelData(Integer value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
		return new WriteCellData(Objects.equals(value, 1) ? "是" : "否");
	}
}

1.继承AnalysisEventListener

public class DataEasyExcelListener  extends AnalysisEventListener {

	private List list = new ArrayList<>();

	@Override
	public void invoke(Object data, AnalysisContext analysisContext) {
		list.add((T) data);
	}

	@Override
	public void doAfterAllAnalysed(AnalysisContext analysisContext) {
	}

	public List getData() {
		return list;
	}
}

2.EXCEL文件读取工具

public class ExcelAnalysisUtil {
	public   List readFile(MultipartFile file,Class head,Integer rowIndex) throws IOException {
		DataEasyExcelListener listener = new DataEasyExcelListener<>();
		EasyExcel.read(file.getInputStream(), head, listener).sheet(0).headRowNumber(rowIndex).doRead();
		return (List) listener.getData();
	}
	public   List readFile(MultipartFile file,Class head) throws IOException {
		return readFile(file,head,0);
	}
}

3.excel文件上传

public R importProduct(MultipartFile file) throws IOException {
		List excelVOList = new ExcelAnalysisUtil().readFile(file,ProductReq.ProductImportReq.class,2);
//业务实现

}