excel 导入导出字段转换器

一、java数据转其他格式

eg: 日期格式转换，枚举类型转换
1、日期格式转换, 在导出的地方日期格式显示为 yyyy-MM-dd HH:mm:ss

package com.onehealthpro.oemr.modules.medicalrecord.utils;

import com.alibaba.excel.converters.Converter;
import com.alibaba.excel.enums.CellDataTypeEnum;
import com.alibaba.excel.metadata.GlobalConfiguration;
import com.alibaba.excel.metadata.data.WriteCellData;
import com.alibaba.excel.metadata.property.ExcelContentProperty;

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

/**
 *  easyExcel 日期转换
 */
public class ConvertToExcelDate implements Converter<Date> {


    private static  final String PATTERN_YYYY_MM_DD = "yyyy-MM-dd HH:mm:ss";

    @Override
    public Class<?> supportJavaTypeKey() {
        return Converter.super.supportJavaTypeKey();
    }

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

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

}

2、枚举类型转换 ，java数据为11 的时候表格显示打电话

package com.onehealthpro.oemr.modules.medicalrecord.utils;

import com.alibaba.excel.converters.Converter;
import com.alibaba.excel.enums.CellDataTypeEnum;
import com.alibaba.excel.metadata.GlobalConfiguration;
import com.alibaba.excel.metadata.data.WriteCellData;
import com.alibaba.excel.metadata.property.ExcelContentProperty;

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

/**
 *  easyExcel 日期转换
 */
public class ConvertToExcelFollowWay implements Converter<Integer> {


    @Override
    public Class<?> supportJavaTypeKey() {
        return Converter.super.supportJavaTypeKey();
    }

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

    @Override
    public WriteCellData<?> convertToExcelData(Integer value, ExcelContentProperty contentProperty, GlobalConfiguration globalConfiguration) throws Exception {
        String dateValue = null;
        if (Objects.equals(value,11)){
            dateValue = "打电话";
        }
        if (Objects.equals(value,12)){
            dateValue = "微信消息";
        }
        if (Objects.equals(value,13)){
            dateValue = "面对面";
        }
        if (Objects.isNull(dateValue)){
            return null;
        }
        return new WriteCellData<>(dateValue);
    }

}

二、其他格式转java数据类型

package com.onehealthpro.oemr.modules.medicalrecord.utils;

import com.alibaba.excel.converters.Converter;
import com.alibaba.excel.converters.ReadConverterContext;
import com.onehealthpro.common.exception.BizException;
import lombok.extern.slf4j.Slf4j;

import java.util.Objects;

/**
 * 物资分类转换器
 */
@Slf4j
public class MaterialClassificationConvert implements Converter<Integer> {

    @Override
    public Integer convertToJavaData(ReadConverterContext<?> context) throws Exception {
        String data = context.getReadCellData().getStringValue();
        if (null == data) {
            throw new BizException("物资分类不能为空");
        };//非空判断
        if (Objects.equals(data,"药品")){
            return 1;
        }else if (Objects.equals(data,"耗材")){
            return 2;
        }else if (Objects.equals(data,"设备") || Objects.equals(data,"其它")){
            return 3;
        }
        return null;
    }
}