easyExcel 写复杂表头

写模板

模板图片：

实体类（这里没有用@Data 是因为Lombok和easyExcal的版本冲突，在导入读取的时候获取不到值）

package cn.iocoder.yudao.module.project.controller.admin.goods.vo;

import com.alibaba.excel.annotation.ExcelIgnore;
import com.alibaba.excel.annotation.ExcelProperty;
import jdk.nashorn.internal.ir.annotations.Ignore;
import lombok.Data;
import lombok.NoArgsConstructor;

import java.math.BigDecimal;
import java.util.List;
import java.util.Map;


/**
 * 商品下载模板
 * @author px
 */
public class GoodsTemplateExcelVO {
    @ExcelProperty(index = 0)
    private String bn;

    @ExcelProperty(index = 1)
    private String productName;

    @ExcelProperty(index = 2)
    private String brandNameCn;

    @ExcelProperty(index = 3)
    private String brandNameEn;

    @ExcelProperty(index = 4)
    private String brandLogo;

    @ExcelProperty(index = 5)
    private String url;

    @ExcelProperty(index = 6)
    private String jingle;

    @ExcelProperty(index = 7)
    private String categoryName1;

    @ExcelProperty(index = 8)
    private String categoryName2;

    @ExcelProperty(index = 9)
    private String categoryName3;

    @ExcelProperty(index = 10)
    private String unit;

    @ExcelProperty(index = 11)
    private String model;

    @ExcelProperty(index = 12)
    private String pakeageSpec;

    @ExcelProperty(index = 13)
    private String taxCode;

    @ExcelProperty(index = 14)
    private String outputTaxRate;

    @ExcelProperty(index = 15)
    private String codeBar;

    @ExcelProperty(index = 16)
    private BigDecimal price;

    @ExcelProperty(index = 17)
    private BigDecimal actualPrice;

    @ExcelProperty(index = 18)
    private String discountRate;

    @ExcelProperty(index = 19)
    private String isReturnStr;

    @ExcelProperty(index = 20)
    private String onlineStateStr;

    @ExcelProperty(index = 21)
    private Integer deliveryTime;

    @ExcelProperty(index = 22)
    private Integer arrivalTime;

    @ExcelProperty(index = 23)
    private Integer batchNum;

    @ExcelProperty(index = 24)
    private String firstAreaName;

    @ExcelProperty(index = 25)
    private String secondAreaName;

    @ExcelProperty(index = 26)
    private String thirdAreaName;

    @ExcelProperty(index = 27)
    private String storageArea;

    @ExcelProperty(index = 28)
    private Integer storage;

    @ExcelProperty(index = 29)
    private String attrJson;

    @ExcelProperty(index = 30)
    private String exceptionList;

    @ExcelIgnore
    private String projectName;

    @ExcelIgnore
    private Integer queueId;

    public String getBn() {
        return bn;
    }

    public void setBn(String bn) {
        this.bn = bn;
    }

    public String getProductName() {
        return productName;
    }

    public void setProductName(String productName) {
        this.productName = productName;
    }

    public String getBrandNameCn() {
        return brandNameCn;
    }

    public void setBrandNameCn(String brandNameCn) {
        this.brandNameCn = brandNameCn;
    }

    public String getBrandNameEn() {
        return brandNameEn;
    }

    public void setBrandNameEn(String brandNameEn) {
        this.brandNameEn = brandNameEn;
    }

    public String getBrandLogo() {
        return brandLogo;
    }

    public void setBrandLogo(String brandLogo) {
        this.brandLogo = brandLogo;
    }

    public String getUrl() {
        return url;
    }

    public void setUrl(String url) {
        this.url = url;
    }

    public String getJingle() {
        return jingle;
    }

    public void setJingle(String jingle) {
        this.jingle = jingle;
    }

    public String getCategoryName1() {
        return categoryName1;
    }

    public void setCategoryName1(String categoryName1) {
        this.categoryName1 = categoryName1;
    }

    public String getCategoryName2() {
        return categoryName2;
    }

    public void setCategoryName2(String categoryName2) {
        this.categoryName2 = categoryName2;
    }

    public String getCategoryName3() {
        return categoryName3;
    }

    public void setCategoryName3(String categoryName3) {
        this.categoryName3 = categoryName3;
    }

    public String getUnit() {
        return unit;
    }

    public void setUnit(String unit) {
        this.unit = unit;
    }

    public String getModel() {
        return model;
    }

    public void setModel(String model) {
        this.model = model;
    }

    public String getPakeageSpec() {
        return pakeageSpec;
    }

    public void setPakeageSpec(String pakeageSpec) {
        this.pakeageSpec = pakeageSpec;
    }

    public String getTaxCode() {
        return taxCode;
    }

    public void setTaxCode(String taxCode) {
        this.taxCode = taxCode;
    }

    public String getOutputTaxRate() {
        return outputTaxRate;
    }

    public void setOutputTaxRate(String outputTaxRate) {
        this.outputTaxRate = outputTaxRate;
    }

    public String getCodeBar() {
        return codeBar;
    }

    public void setCodeBar(String codeBar) {
        this.codeBar = codeBar;
    }

    public BigDecimal getPrice() {
        return price;
    }

    public void setPrice(BigDecimal price) {
        this.price = price;
    }

    public BigDecimal getActualPrice() {
        return actualPrice;
    }

    public void setActualPrice(BigDecimal actualPrice) {
        this.actualPrice = actualPrice;
    }

    public String getDiscountRate() {
        return discountRate;
    }

    public void setDiscountRate(String discountRate) {
        this.discountRate = discountRate;
    }

    public String getIsReturnStr() {
        return isReturnStr;
    }

    public void setIsReturnStr(String isReturnStr) {
        this.isReturnStr = isReturnStr;
    }

    public String getOnlineStateStr() {
        return onlineStateStr;
    }

    public void setOnlineStateStr(String onlineStateStr) {
        this.onlineStateStr = onlineStateStr;
    }

    public Integer getDeliveryTime() {
        return deliveryTime;
    }

    public void setDeliveryTime(Integer deliveryTime) {
        this.deliveryTime = deliveryTime;
    }

    public Integer getArrivalTime() {
        return arrivalTime;
    }

    public void setArrivalTime(Integer arrivalTime) {
        this.arrivalTime = arrivalTime;
    }

    public Integer getBatchNum() {
        return batchNum;
    }

    public void setBatchNum(Integer batchNum) {
        this.batchNum = batchNum;
    }

    public String getFirstAreaName() {
        return firstAreaName;
    }

    public void setFirstAreaName(String firstAreaName) {
        this.firstAreaName = firstAreaName;
    }

    public String getSecondAreaName() {
        return secondAreaName;
    }

    public void setSecondAreaName(String secondAreaName) {
        this.secondAreaName = secondAreaName;
    }

    public String getThirdAreaName() {
        return thirdAreaName;
    }

    public void setThirdAreaName(String thirdAreaName) {
        this.thirdAreaName = thirdAreaName;
    }

    public String getStorageArea() {
        return storageArea;
    }

    public void setStorageArea(String storageArea) {
        this.storageArea = storageArea;
    }

    public Integer getStorage() {
        return storage;
    }

    public void setStorage(Integer storage) {
        this.storage = storage;
    }

    public String getAttrJson() {
        return attrJson;
    }

    public void setAttrJson(String attrJson) {
        this.attrJson = attrJson;
    }

    public String getExceptionList() {
        return exceptionList;
    }

    public void setExceptionList(String exceptionList) {
        this.exceptionList = exceptionList;
    }

    public String getProjectName() {
        return projectName;
    }

    public void setProjectName(String projectName) {
        this.projectName = projectName;
    }

    public Integer getQueueId() {
        return queueId;
    }

    public void setQueueId(Integer queueId) {
        this.queueId = queueId;
    }

    public GoodsTemplateExcelVO(){

    }

    public GoodsTemplateExcelVO(String bn) {
        this.bn = bn;
        this.productName = "测试商品";
        this.brandNameCn = "品牌";
        this.brandNameEn = "pingpai";
        this.brandLogo = "https://img30.360buyimg.com/jgsq-productsoa/jfs/t1…5298/88691/63da0918Fb060cb06/6929f345feb64ed2.jpg";
        this.url = "https://www.ofs.cn/product-394804.html";
        this.jingle = "介绍";
        this.categoryName1 = "工具/工具耗材";
        this.categoryName2 = "手动工具";
        this.categoryName3 = "扳手";
        this.unit = "单位";
        this.model = "T88110-27";
        this.pakeageSpec = "1*1*1";
        this.taxCode = "";
        this.outputTaxRate = "13%";
        this.codeBar = "";
        this.discountRate = "20%";
        this.isReturnStr = "允许";
        this.onlineStateStr = "上架";
        this.deliveryTime = 1;
        this.arrivalTime = 1;
        this.batchNum = 2;
        this.firstAreaName = "全国";
        this.secondAreaName = "";
        this.thirdAreaName = "";
        this.storageArea = "重庆";
        this.storage = 999;
        this.attrJson = "保质期:12个月;" +
                "商品简介:徐福记 卷心酥 105g 香浓奶油味";
    }
}

public void downloadGoodsTemplateFile(HttpServletResponse response) {
        response.setContentType("application/vnd.ms-excel");
        response.setCharacterEncoding("UTF-8");
        response.setHeader("Content-disposition", "attachment;filename=商品模板.xls");
      
        GoodsTemplateExcelVO goodsTemplateExcelVO = new GoodsTemplateExcelVO("123");
        List<GoodsTemplateExcelVO> goodsTemplateExcelVOList = new ArrayList<>();
        goodsTemplateExcelVOList.add(goodsTemplateExcelVO);
        try {
         // 这里需要设置不关闭流
            WriteCellStyle headWriteCellStyle = new WriteCellStyle();
            //设置背景颜色
            headWriteCellStyle.setFillForegroundColor(IndexedColors.WHITE.getIndex());
            //内容策略
            WriteCellStyle contentWriteCellStyle = new WriteCellStyle();
            //设置 水平居中
            contentWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);
            HorizontalCellStyleStrategy horizontalCellStyleStrategy =
                    new HorizontalCellStyleStrategy(headWriteCellStyle, contentWriteCellStyle);
            EasyExcel.write(response.getOutputStream()).autoCloseStream(Boolean.FALSE)
                    .registerWriteHandler(horizontalCellStyleStrategy)
                    .head(mergeGoodsDetailHead()).sheet("商品信息")
                    //获取数据填充
                    .doWrite(goodsTemplateExcelVOList);
        } catch (Exception e) {
        }
    }

自定义头部

private List<List<String>> mergeGoodsDetailHead() {
        String title = "XXX信息统计报表";
        List<List<String>> list = new ArrayList<>();
        String erTitle = "MRO标品SKU 商品名称 品牌中文名称 品牌英文名称 品牌图片链接 商品链接 商品介绍 一级分类名称 二级分类名称 " +
                "三级分类名称 商品单位 商品型号 包装规格 税收编码 销售税税率 条形码 官网价 协议价 折扣率 允许退换货(允许，不允许) 上下架状态(下架，上架) 预计发货时间(天) " +
                "预计补货时间(天) 最小起订量 一级供货地址 二级供货地址 三级供货地址 库存所在地 库存 类目属性";
        Arrays.stream(erTitle.split(" ")).forEach(name -> {
            List<String> head = new ArrayList<>();
            head.add(title);
            head.add(name);
            list.add(head);
        });
        return list;
    }