动态表头导出excel

红框固定，绿框动态

引入依赖

        <dependency><groupId>com.alibaba</groupId><artifactId>easyexcel</artifactId><version>3.1.1</version></dependency>

工具类

import com.alibaba.excel.util.ListUtils;
import com.alibaba.excel.write.metadata.style.WriteCellStyle;
import com.alibaba.excel.write.metadata.style.WriteFont;
import com.alibaba.excel.write.style.HorizontalCellStyleStrategy;
import com.mcsgis.saas.common.data.DynamicExcel;
import org.apache.poi.ss.usermodel.BorderStyle;
import org.apache.poi.ss.usermodel.HorizontalAlignment;
import org.apache.poi.ss.usermodel.IndexedColors;
import org.apache.poi.ss.usermodel.VerticalAlignment;import java.util.List;/*** @author: xianyu* @createDate: 2024/6/6* @description: 动态表头excel导出*/
public class DynamicExcelUtil {/*** 设置表头** @param dynamicExcel* @return*/public static List<List<String>> head(DynamicExcel dynamicExcel) {List<List<String>> headTitles = ListUtils.newArrayList();String empty = " ";//表头可以根据实际情况进行修改List<String> fixedColumn = dynamicExcel.getFixedColumn();for (String s : fixedColumn) {headTitles.add(ListUtils.newArrayList(s));}//一级表头List<String> mealList = dynamicExcel.getMealList();//二级表头List<String> foodList = dynamicExcel.getFoodList();// 根据实际需要，决定要渲染多少列mealList.forEach(meal -> {foodList.forEach(food -> {headTitles.add(ListUtils.newArrayList(meal, food));});});return headTitles;}/*** 配置字体，表头背景等** @return*/public static HorizontalCellStyleStrategy setConfigure() {// 头的策略WriteCellStyle headWriteCellStyle = new WriteCellStyle();// 背景色headWriteCellStyle.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());WriteFont headWriteFont = new WriteFont();// 加粗headWriteFont.setBold(true);headWriteCellStyle.setWriteFont(headWriteFont);// 内容的策略WriteCellStyle contentWriteCellStyle = new WriteCellStyle();// 字体策略WriteFont contentWriteFont = new WriteFont();// 字体大小//contentWriteFont.setFontHeightInPoints((short) 14);contentWriteCellStyle.setWriteFont(contentWriteFont);//边框//导出数据垂直居中contentWriteCellStyle.setVerticalAlignment(VerticalAlignment.CENTER);//导出数据水平居中contentWriteCellStyle.setHorizontalAlignment(HorizontalAlignment.CENTER);contentWriteCellStyle.setBorderLeft(BorderStyle.THIN);contentWriteCellStyle.setBorderTop(BorderStyle.THIN);contentWriteCellStyle.setBorderRight(BorderStyle.THIN);contentWriteCellStyle.setBorderBottom(BorderStyle.THIN);//设置 自动换行contentWriteCellStyle.setWrapped(true);//设置// 这个策略是 头是头的样式 内容是内容的样式 其他的策略可以自己实现return new HorizontalCellStyleStrategy(headWriteCellStyle, contentWriteCellStyle);}
}

调用

    @GetMapping("load")public void downLoad(HttpServletResponse response) throws IOException {response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");response.setCharacterEncoding("utf-8");// 这里URLEncoder.encode可以防止中文乱码 当然和easyexcel没有关系String fileName = URLEncoder.encode("按收费渠道", "UTF-8").replaceAll("\\+", "%20");response.setHeader("Content-disposition", "attachment;filename*=utf-8''" + fileName + ".xlsx");ExcelWriter writer = EasyExcelFactory.write(response.getOutputStream())//列宽.registerWriteHandler(new SimpleColumnWidthStyleStrategy(16)).registerWriteHandler(new SimpleRowHeightStyleStrategy((short) 40, (short) 30))// 核心代码：表头和正文的样式在此.registerWriteHandler(DynamicExcelUtil.setConfigure()).build();// 动态添加表头，适用一些表头动态变化的场景WriteSheet sheet1 = new WriteSheet();sheet1.setSheetName("sheet001");sheet1.setSheetNo(0);DynamicExcel dynamicExcel = new DynamicExcel();//固定列List<String> fixedColumn = new ArrayList<>();fixedColumn.add("项目名称");fixedColumn.add("收费日期");//一级表头List<String> mealList = new ArrayList<>();mealList.add("线下-线下支付");mealList.add("线下微信扫码");mealList.add("微信小程序");mealList.add("PC微信");mealList.add("合计");//二级表头List<String> foodList = new ArrayList<>();foodList.add("实收金额");foodList.add("手续费金额");foodList.add("分账金额");foodList.add("实际到账金额");//内容List<List<Object>> contentList = new ArrayList<>();for (int i = 0; i < 10; i++) {List<Object> content = new ArrayList<>();content.add(1);content.add(2);content.add(3);content.add(4);content.add(5);content.add(6);content.add(7);content.add(8);content.add(9);content.add(10);content.add(11);content.add(12);content.add(13);content.add(14);content.add(15);content.add(16);content.add(17);content.add(18);content.add(19);content.add(20);content.add(21);content.add(22);contentList.add(content);}dynamicExcel.setFixedColumn(fixedColumn);dynamicExcel.setMealList(mealList);dynamicExcel.setFoodList(foodList);dynamicExcel.setContentList(contentList);// 创建一个表格，用于 Sheet 中使用WriteTable table = new WriteTable();table.setTableNo(1);// 核心代码：设置表头table.setHead(DynamicExcelUtil.head(dynamicExcel));// 写数据writer.write(dynamicExcel.getContentList(), sheet1, table);writer.finish();}

结果