api/ruoyi-common/src/main/java/com/ruoyi/common/utils/converter/DateMonthConverter.java

package com.ruoyi.common.utils.converter;


import com.alibaba.excel.converters.Converter;
import com.alibaba.excel.converters.WriteConverterContext;
import com.alibaba.excel.metadata.data.WriteCellData;

import java.text.SimpleDateFormat;
import java.util.Date;

public class DateMonthConverter implements Converter<Date> {
    private static  final String PATTERN_YYYY_MM = "yyyy-MM";


    @Override
    public Class<Date> supportJavaTypeKey() {
        return Date.class;
    }


    @Override
    public WriteCellData<String> convertToExcelData(WriteConverterContext<Date> context) throws Exception {
        Date date = context.getValue();
        if (date == null) {
            return null;
        }
        SimpleDateFormat sdf = new SimpleDateFormat(PATTERN_YYYY_MM);
        return new WriteCellData<>(sdf.format(date));
    }

}