EasyExcel表头处理

 表头1：景点客流统计，为动态表头，每个表不一样；

表头2：日期

表头3：固定的表头

该表导出采用@ExcelProperty注解形式进行处理的

//"${bigHead}","${dateHead}" 为可自行配置的动态表头
@ExcelProperty(value = {"${bigHead}","${dateHead}","序号"}, index = 0)
private Integer serialNumber;

在导出的时候需要处理实体上配置的的动态表头

package com.tengyun.ykt.customer.util;

import com.alibaba.excel.metadata.Head;
import com.alibaba.excel.metadata.data.WriteCellData;
import com.alibaba.excel.write.handler.CellWriteHandler;
import com.alibaba.excel.write.metadata.holder.WriteSheetHolder;
import com.alibaba.excel.write.metadata.holder.WriteTableHolder;
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.collections.CollectionUtils;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.springframework.util.ObjectUtils;
import org.springframework.util.PropertyPlaceholderHelper;


import java.util.List;
import java.util.Properties;

@Slf4j
public class ExcelTitleHandler implements CellWriteHandler {
    /**
     错误信息处理时正则表达式的格式
     */
    private final String EXCEL_ERROR_REG = "^(.*)(\\(错误:)(.*)(\\))$";

    private String bigHead;

    private String dateHead;

    PropertyPlaceholderHelper placeholderHelper = new PropertyPlaceholderHelper("${", "}");

    public ExcelTitleHandler( String bigHead,String dateHead) {
        this.bigHead = bigHead; //表头1
        this.dateHead = dateHead;  //表头2
    }

    @Override
    public void beforeCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Row row, Head head, Integer columnIndex, Integer relativeRowIndex, Boolean isHead) {
        // 动态设置表头字段
        if (!ObjectUtils.isEmpty(head)) {
            List headNameList = head.getHeadNameList();
            if (CollectionUtils.isNotEmpty(headNameList)) {
                Properties properties = new Properties();
                properties.setProperty("bigHead", bigHead);
                properties.setProperty("dateHead", dateHead);
                for (int i = 0 ; i < headNameList.size() ; i++){
                    // 循环遍历替换
                    headNameList.set(i, placeholderHelper.replacePlaceholders(headNameList.get(i), properties));
                }
            }
        }
    }

    @Override
    public void afterCellCreate(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {
    }



    @Override
    public void afterCellDispose(WriteSheetHolder writeSheetHolder, WriteTableHolder writeTableHolder, List> cellDataList, Cell cell, Head head, Integer relativeRowIndex, Boolean isHead) {


    }
}

          EasyExcel.write(response.getOutputStream(), TicketTouristStatisticsByItineraryResultVo.class)
                    //插入数据
                    .sheet(sheetName)
                    
                    .registerWriteHandler(new ExcelTitleHandler("表头1","表头2"))
                   
                    .doWrite(ticketTouristStatisticsByItineraryResultVos);