前提：需要引入easyExcel

EXCEL上傳指定行讀取數據

前置條件

entity

@Data
	@AllArgsConstructor
	@NoArgsConstructor
	@Builder
	public static class ProductImportReq{
		@ExcelProperty(value = "外部商品編碼",index = 0)
		@ApiModelProperty(value="外部產品編碼")
		private String externalProductCode;

		@ExcelProperty(value = "商品編碼",index = 1)
		@ApiModelProperty(value = "商品編碼")
		private String productCode;
		/**
		 * 產品名稱
		 */
		@ExcelProperty(value = "商品名稱",index = 2)
		@ApiModelProperty(value = "產品名稱")
		private String productName;


		@NotNull(message = "是否標品")
		@ExcelProperty(value = "是否標品",converter = IntegerConverter.class,index = 3)
		@ApiModelProperty(value = "是否標準品0 否  1是")
		private Integer isStandard;}

中文數字轉換器

public class IntegerConverter implements Converter<Integer> {
	@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<String> convertToExcelData(Integer value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
		return new WriteCellData<String>(Objects.equals(value, 1) ? "是" : "否");
	}
}

1.繼承AnalysisEventListener

public class DataEasyExcelListener <T> extends AnalysisEventListener {

	private List<T> list = new ArrayList<>();

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

	@Override
	public void doAfterAllAnalysed(AnalysisContext analysisContext) {
	}

	public List<T> getData() {
		return list;
	}
}

2.EXCEL文件讀取工具

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

3.excel文件上傳文章來源地址http://www.zghlxwxcb.cn/news/detail-528852.html

public R importProduct(MultipartFile file) throws IOException {
		List<ProductReq.ProductImportReq> excelVOList = new ExcelAnalysisUtil().readFile(file,ProductReq.ProductImportReq.class,2);
//業(yè)務實現

}

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