自定格式常量类

public class ExcelFormatConstants {

    public static final String DATE_FORMAT = "yyyy-MM-dd";
    public static final String NUMBER_FORMAT_DEFAULT = "#,##0.00";
    public static final String NUMBER_FORMAT_FOUR_DECIMAL = "#,##0.0000";
    public static final String NUMBER_FORMAT_TEN_DECIMAL = "#,##0.0000000000";
    public static final String SEPARATOR = ",";
    public static final int SCALE = -1;

}

EasyExcel使用注解@NumberFormat

@ExcelProperty("物料的单公斤成本(元/千克)")
@NumberFormat(ExcelFormatConstants.NUMBER_FORMAT_FOUR_DECIMAL)
private BigDecimal weightCost;

若依的excel 使用注解@Exce属性numberFormat

@Excel(name = "产出重量",numberFormat = ExcelFormatConstants.NUMBER_FORMAT_DEFAULT, cellType = Excel.ColumnType.NUMERIC, align = HorizontalAlignment.RIGHT)
private BigDecimal weightOut;