轉換器：

package com.leadtrans.report.config;
 
import com.alibaba.excel.converters.Converter;
import com.alibaba.excel.converters.ReadConverterContext;
import com.alibaba.excel.converters.WriteConverterContext;
import com.alibaba.excel.enums.CellDataTypeEnum;
import com.alibaba.excel.metadata.GlobalConfiguration;
import com.alibaba.excel.metadata.data.CellData;
import com.alibaba.excel.metadata.data.ReadCellData;
import com.alibaba.excel.metadata.data.WriteCellData;
import com.alibaba.excel.metadata.property.ExcelContentProperty;
 
import java.math.BigDecimal;
import java.time.Instant;
import java.time.LocalDate;
import java.time.LocalDateTime;
import java.time.ZoneId;
import java.time.format.DateTimeFormatter;
 
/**
 * @author: Tyler
 * @createDate: 2021/12/9
 */
 
 
public class ConverterDateTime  implements Converter<LocalDate> {
 
    @Override
    public Class<?> supportJavaTypeKey() {
        return LocalDateTime.class;
    }
 
    @Override
    public CellDataTypeEnum supportExcelTypeKey() {
        return CellDataTypeEnum.STRING;
    }
 
    @Override
    public LocalDate convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
        if(cellData.getNumberValue()==null)
            return null;
        BigDecimal numberValue = cellData.getNumberValue();
        System.out.println("numberValue:"+numberValue);
        long second = numberValue.multiply(new BigDecimal("86400")).longValue();
        System.out.println("second:"+second);
        Instant instant = Instant.ofEpochSecond(second-2209190400L);
        return LocalDate.ofInstant(instant, ZoneId.systemDefault());
    }
 
    @Override
    public WriteCellData<?> convertToExcelData(LocalDate value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
        return new WriteCellData(value.format(DateTimeFormatter.ofPattern("yyyy-MM-dd")));
    }
 
}

model

@ExcelProperty(value = "ATD",converter = ConverterDateTime.class)
    private LocalDate ATD;//實際裝貨
    @ExcelProperty(value = "ATA",converter = ConverterDateTime.class)
    private LocalDate ATA;//實際卸貨

PS: excel中的單元格 ， 不能是文本類型。

否則需要修改轉換器中cellData.getNumberValue() 為cellData.getStringValue()

總結

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