Java使用FastExcel导入支持多种时间格式

public void testDump() throws ParserException, ReadException {
	Workbook workBook;
	workBook = FastExcel.createReadableWorkbook(new File("test.xls"));
	workBook.open();
	Sheet s;
	s = workBook.getSheet(0);
	System.out.println("SHEET:"+s);
	for (int i = s.getFirstRow(); i <= s.getLastRow(); i++) {
	System.out.print(i+"#");
	for (int j = s.getFirstColumn(); j <=s.getLastColumn(); j++) {
		System.out.print(","+s.getCell(i, j));
	}
	System.out.println();
	}
	workBook.close();
}

/**
 * 合作开始日期*
 */
@ExcelProperty(index  = 22,converter = ExcelDateConverter.class)
private Date cooperationDate;

package com.vipsoft.base.util;

import java.text.SimpleDateFormat;
import java.time.LocalDate;
import java.time.ZoneId;
import java.time.ZonedDateTime;
import java.util.Date;

import cn.idev.excel.converters.Converter;
import cn.idev.excel.enums.CellDataTypeEnum;
import cn.idev.excel.metadata.GlobalConfiguration;
import cn.idev.excel.metadata.data.ReadCellData;
import cn.idev.excel.metadata.property.ExcelContentProperty;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * 日期格式转换器
 */
public class ExcelDateConverter implements Converter<Date> {
    private static final Logger log = LoggerFactory.getLogger(ExcelDateConverter.class);
    // 定义所有要尝试的日期格式
    SimpleDateFormat[] formats = {
            new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"),
            new SimpleDateFormat("yyyy/MM/dd HH:mm:ss"),
            new SimpleDateFormat("yyyy/MM/dd"),
            new SimpleDateFormat("yyyy-MM-dd"),
            new SimpleDateFormat("yyyy/MM"),
            new SimpleDateFormat("yyyy/MM"),
            new SimpleDateFormat("yyyyMMdd")
    };

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

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


    @Override
    public Date convertToJavaData(ReadCellData<?> cellData, ExcelContentProperty contentProperty,
                                  GlobalConfiguration globalConfiguration) throws Exception {
        String cellValue = "";
        if (cellData.getType().equals(CellDataTypeEnum.NUMBER)) {
            long cellIntValue = cellData.getNumberValue().longValue();
            if (cellIntValue > 19900100) {
                try {
                    // 1. 第一种解析，传入的是数字形式的日期，形如yyyyMMdd
                    SimpleDateFormat originalFormat = new SimpleDateFormat("yyyyMMdd");
                    return originalFormat.parse(String.valueOf(cellIntValue));
                } catch (Exception e) {
                    log.warn("exception when parse numerical time with format yyyyMMdd");
                    cellValue=String.valueOf(cellIntValue);
                }
            }

            // 2. 第二种解析， excel是从1900年开始计算,最终通过计算与1900年间隔的天数计算目标日期
            LocalDate localDate = LocalDate.of(1900, 1, 1);

            //excel 有些奇怪的bug, 导致日期数差2
            localDate = localDate.plusDays(cellIntValue - 2);

            // 转换为ZonedDateTime（如果需要时区信息）
            ZonedDateTime zonedDateTime = localDate.atStartOfDay(ZoneId.systemDefault());
            return Date.from(zonedDateTime.toInstant());
        } else if (cellData.getType().equals(CellDataTypeEnum.STRING)) {
            // 3. 第三种解析
            Date date = null;
            cellValue = cellData.getStringValue();
            for (SimpleDateFormat format : formats) {
                try {
                    date = format.parse(cellValue);
                    if (date != null) {
                        // 这一步是将日期格式化为Java期望的格式
                        return date;
                    }
                } catch (Exception e) {
                    // 如果有异常，捕捉异常后继续解析
                    log.error(e.getMessage(), e);
                }
            }
        }
        // 如果有异常，捕捉异常后继续解析
        throw new UnsupportedOperationException("The current operation is not supported by the current converter." + cellValue);
    }
 

    @Override
    public WriteCellData<?> convertToExcelData(Date value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        String dateValue = sdf.format(value);
        return new WriteCellData<>(dateValue);
    }	
}