JAVA POI导出复杂表头Excel

参考文章 https://blog.csdn.net/u013585096/article/details/83503519

1. 我的结果表格样式

2.      //Excel
        HSSFWorkbook hssfWorkbook = new HSSFWorkbook();
        Sheet sheet = hssfWorkbook.createSheet("sheet1");
        //表头字体
        Font headerFont = hssfWorkbook.createFont();
        
        headerFont.setFontName("微软雅黑");
        headerFont.setFontHeightInPoints((short) 18);
        headerFont.setBoldweight(Font.BOLDWEIGHT_NORMAL);
        headerFont.setColor(HSSFColor.BLACK.index);
        //正文字体
        Font contextFont = hssfWorkbook.createFont();
       contextFont.setFontName("微软雅黑");
        contextFont.setFontHeightInPoints((short) 12);
        contextFont.setBoldweight(Font.BOLDWEIGHT_NORMAL);
        contextFont.setColor(HSSFColor.BLACK.index);
   
   
        //表头样式，左右上下居中
        CellStyle headerStyle = hssfWorkbook.createCellStyle();
        headerStyle.setFont(headerFont);
        headerStyle.setAlignment(CellStyle.ALIGN_CENTER);// 左右居中
        headerStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);// 上下居中
        headerStyle.setLocked(true);
        headerStyle.setWrapText(false);// 自动换行
        headerStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
        headerStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框
        headerStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框
        headerStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
   
        //单元格样式，左右上下居中 边框
        CellStyle commonStyle = hssfWorkbook.createCellStyle();
        commonStyle.setFont(contextFont);
        commonStyle.setAlignment(CellStyle.ALIGN_CENTER);// 左右居中
        commonStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);// 上下居中
        commonStyle.setLocked(true);
        commonStyle.setWrapText(false);// 自动换行
        commonStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
        commonStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框
        commonStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框
        commonStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
        //单元格样式，左右上下居中 边框
        CellStyle commonWrapStyle = hssfWorkbook.createCellStyle();
        commonWrapStyle.setFont(contextFont);
        commonWrapStyle.setAlignment(CellStyle.ALIGN_CENTER);// 左右居中
        commonWrapStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);// 上下居中
        commonWrapStyle.setLocked(true);
        commonWrapStyle.setWrapText(true);// 自动换行
        commonWrapStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
        commonWrapStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框
        commonWrapStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框
        commonWrapStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
        //单元格样式，竖向 边框
        CellStyle verticalStyle = hssfWorkbook.createCellStyle();
        verticalStyle.setFont(contextFont);
        verticalStyle.setAlignment(CellStyle.ALIGN_CENTER);// 左右居中
        verticalStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);// 上下居中
        verticalStyle.setRotation((short) 255);//竖向
        verticalStyle.setLocked(true);
        verticalStyle.setWrapText(false);// 自动换行
        verticalStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
        verticalStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框
        verticalStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框
        verticalStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
   
        //单元格样式，左右上下居中 无边框
        CellStyle commonStyleNoBorder = hssfWorkbook.createCellStyle();
        commonStyleNoBorder.setFont(contextFont);
        commonStyleNoBorder.setAlignment(CellStyle.ALIGN_CENTER);// 左右居中
        commonStyleNoBorder.setVerticalAlignment(CellStyle.VERTICAL_CENTER);// 上下居中
        commonStyleNoBorder.setLocked(true);
        commonStyleNoBorder.setWrapText(false);// 自动换行
        //单元格样式，左对齐 边框
        CellStyle alignLeftStyle = hssfWorkbook.createCellStyle();
        alignLeftStyle.setFont(contextFont);
        alignLeftStyle.setAlignment(CellStyle.ALIGN_LEFT);// 左对齐
        alignLeftStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);// 上下居中
        alignLeftStyle.setLocked(true);
        alignLeftStyle.setWrapText(false);// 自动换行
        alignLeftStyle.setAlignment(CellStyle.ALIGN_LEFT);// 左对齐
        alignLeftStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN); //下边框
        alignLeftStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);//左边框
        alignLeftStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);//上边框
        alignLeftStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);//右边框
        //单元格样式，左对齐 无边框
        CellStyle alignLeftNoBorderStyle = hssfWorkbook.createCellStyle();
        alignLeftNoBorderStyle.setFont(contextFont);
        alignLeftNoBorderStyle.setAlignment(CellStyle.ALIGN_LEFT);// 左对齐
        alignLeftNoBorderStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);// 上下居中
        alignLeftNoBorderStyle.setLocked(true);
        alignLeftNoBorderStyle.setWrapText(false);// 自动换行
        alignLeftNoBorderStyle.setAlignment(CellStyle.ALIGN_LEFT);// 左对齐
        //单元格样式，右对齐
        CellStyle alignRightStyle = hssfWorkbook.createCellStyle();
        alignRightStyle.setFont(contextFont);
        alignRightStyle.setAlignment(CellStyle.ALIGN_LEFT);// 左对齐
        alignRightStyle.setVerticalAlignment(CellStyle.VERTICAL_CENTER);// 上下居中
        alignRightStyle.setLocked(true);
        alignRightStyle.setWrapText(false);// 自动换行
        alignRightStyle.setAlignment(CellStyle.ALIGN_RIGHT);// 左对齐
   
        int rowNum = 0;
   
        //设置列宽
        for (int i = 0; i < 24; i++) {
            sheet.setColumnWidth(i, 1800);
        }
   
        //第一行
        Row r0 = sheet.createRow(rowNum++);
        r0.setHeight((short) 800);
        Cell c00 = r0.createCell(0);
        c00.setCellValue("数据");
        c00.setCellStyle(headerStyle);
        //合并单元格
        sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 23));
   
        //第二行
        Row r1 = sheet.createRow(rowNum++);
        r1.setHeight((short) 500);
        String[] row_first = {"统计项目","","","活动日期","",ac_date,"","","活动名称","",ac_name,"","","活动地点","",ac_city,"","","小计","","","","",""};
        for (int i = 0; i < row_first.length; i++) {
            Cell tempCell = r1.createCell(i);
            tempCell.setCellValue(row_first[i]);
            tempCell.setCellStyle(commonStyle);
        }
        //合并单元格
        sheet.addMergedRegion(new CellRangeAddress(1, 1, 0, 2));
        sheet.addMergedRegion(new CellRangeAddress(1, 1, 3, 4));
        sheet.addMergedRegion(new CellRangeAddress(1, 1, 5, 7));
        sheet.addMergedRegion(new CellRangeAddress(1, 1, 8, 9));
        sheet.addMergedRegion(new CellRangeAddress(1, 1, 10, 12));
        sheet.addMergedRegion(new CellRangeAddress(1, 1, 13, 14));
        sheet.addMergedRegion(new CellRangeAddress(1, 1, 15, 17));
        sheet.addMergedRegion(new CellRangeAddress(1, 1, 18, 23));
   
        //第三行
        Row r2 = sheet.createRow(rowNum++);
        r2.setHeight((short) 700);
        String[] row_second = {"断面编号","","","1","","", "2","","", "3","","", "4","","", "5","","","-","","","","",""};
        for (int i = 0; i < row_second.length; i++) {
            Cell tempCell = r2.createCell(i);
            tempCell.setCellValue(row_second[i]);
            tempCell.setCellStyle(commonStyle);
        }
        //合并单元格
        sheet.addMergedRegion(new CellRangeAddress(2,2,0,2));
        sheet.addMergedRegion(new CellRangeAddress(2,2,3,5));
        sheet.addMergedRegion(new CellRangeAddress(2,2,6,8));
        sheet.addMergedRegion(new CellRangeAddress(2,2,9,11));
        sheet.addMergedRegion(new CellRangeAddress(2,2,12,14));
        sheet.addMergedRegion(new CellRangeAddress(2,2,15,17));
        sheet.addMergedRegion(new CellRangeAddress(2,2,18,23));
   
   
        //第四行
        Row r3 = sheet.createRow(rowNum++);
       r3.setHeight((short) 700);
        String[] row_third = {"小组人数","","", group[0],"","", group[1],"","", group[2],"","", group[3],"","", group[4],"","",totalP,"","","","",""};
        for (int i = 0; i < row_third.length; i++) {
            Cell tempCell = r3.createCell(i);
            tempCell.setCellValue(row_third[i]);
            tempCell.setCellStyle(commonStyle);
        }
        //合并单元格
        sheet.addMergedRegion(new CellRangeAddress(3,3,0,2));
        sheet.addMergedRegion(new CellRangeAddress(3,3,3,5));
        sheet.addMergedRegion(new CellRangeAddress(3,3,6,8));
        sheet.addMergedRegion(new CellRangeAddress(3,3,9,11));
        sheet.addMergedRegion(new CellRangeAddress(3,3,12,14));
        sheet.addMergedRegion(new CellRangeAddress(3,3,15,17));
        sheet.addMergedRegion(new CellRangeAddress(3,3,18,23));
   
        //第五行
        Row r4 = sheet.createRow(rowNum++);
       r4.setHeight((short) 700);
        String[] row_fourth = {"清理长度","","", section[0],"","", section[1],"","", section[2],"","",section[3],"","", section[4],"","",totalL,"","","","",""};
        for (int i = 0; i < row_fourth.length; i++) {
            Cell tempCell = r4.createCell(i);
            tempCell.setCellValue(row_fourth[i]);
            tempCell.setCellStyle(commonStyle);
        }
        //合并单元格
        sheet.addMergedRegion(new CellRangeAddress(4,4,0,2));
        sheet.addMergedRegion(new CellRangeAddress(4,4,3,5));
        sheet.addMergedRegion(new CellRangeAddress(4,4,6,8));
        sheet.addMergedRegion(new CellRangeAddress(4,4,9,11));
        sheet.addMergedRegion(new CellRangeAddress(4,4,12,14));
        sheet.addMergedRegion(new CellRangeAddress(4,4,15,17));
        sheet.addMergedRegion(new CellRangeAddress(4,4,18,23));
   
   
        //第六行
        Row r5 = sheet.createRow(rowNum++);
        r5.setHeight((short) 700);
        String[] row_five = {"分类项目", "","","数量", "重量(g)", "","数量", "重量(g)", "","数量", "重量(g)","","数量", "重量(g)","","数量", "重量(g)","","数量小计","","", "重量小计(g)","",""};
        for (int i = 0; i < row_five.length; i++) {
            Cell tempCell = r5.createCell(i);
            tempCell.setCellValue(row_five[i]);
            tempCell.setCellStyle(commonStyle);
        }
        //合并单元格
        sheet.addMergedRegion(new CellRangeAddress(5,5,0,2));
        sheet.addMergedRegion(new CellRangeAddress(5,5,3,3));
        sheet.addMergedRegion(new CellRangeAddress(5,5,4,5));
        sheet.addMergedRegion(new CellRangeAddress(5,5,6,6));
        sheet.addMergedRegion(new CellRangeAddress(5,5,7,8));
        sheet.addMergedRegion(new CellRangeAddress(5,5,9,9));
        sheet.addMergedRegion(new CellRangeAddress(5,5,10,11));
        sheet.addMergedRegion(new CellRangeAddress(5,5,12,12));
        sheet.addMergedRegion(new CellRangeAddress(5,5,13,14));
        sheet.addMergedRegion(new CellRangeAddress(5,5,15,15));
        sheet.addMergedRegion(new CellRangeAddress(5,5,16,17));
        sheet.addMergedRegion(new CellRangeAddress(5,5,18,20));
        sheet.addMergedRegion(new CellRangeAddress(5,5,21,23));
   
   
        //第N行
        for (int i = 0; i < partTwoListSize; i++) {
            String m1 = partTwoList.get(i).get("m1").toString();
            String m2 = partTwoList.get(i).get("m2").toString();
            String m3 = partTwoList.get(i).get("m3").toString();
            String m4 = partTwoList.get(i).get("m4").toString();
            String m5 = partTwoList.get(i).get("m5").toString();
            String mj = partTwoList.get(i).get("mj").toString();
            String w1 = partTwoList.get(i).get("w1").toString();
            String w2 = partTwoList.get(i).get("w2").toString();
            String w3 = partTwoList.get(i).get("w3").toString();
            String w4 = partTwoList.get(i).get("w4").toString();
            String w5 = partTwoList.get(i).get("w5").toString();
            String wj = partTwoList.get(i).get("wj").toString();
   
   
            //合并单元格
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,0,2));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,3,3));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,4,5));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,6,6));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,7,8));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,9,9));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,10,11));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,12,12));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,13,14));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,15,15));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,16,17));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,18,20));
            sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,21,23));
            //数据
            Row rn = sheet.createRow(rowNum++);
           rn.setHeight((short) 700);
            String[] row_rns = {partTwoList.get(i).get("cate").toString(), "","",m1, w1, "",m2, w2, "",m3, w3,"",m4, w4,"",m5, w5,"",mj,"","", wj,"",""};
            for (int j = 0; j < row_rns.length; j++) {
                Cell tempCell = rn.createCell(j);
                tempCell.setCellValue(row_rns[j]);
                tempCell.setCellStyle(commonStyle);
            }
   
        }
   
        //总计行
        String zm1 = zongJi.get("zm1").toString();
        String zm2 = zongJi.get("zm2").toString();
        String zm3 = zongJi.get("zm3").toString();
        String zm4 = zongJi.get("zm4").toString();
        String zm5 = zongJi.get("zm5").toString();
        String zmj = zongJi.get("zmj").toString();
        String zw1 = zongJi.get("zw1").toString();
        String zw2 = zongJi.get("zw2").toString();
        String zw3 = zongJi.get("zw3").toString();
        String zw4 = zongJi.get("zw4").toString();
        String zw5 = zongJi.get("zw5").toString();
        String zwj = zongJi.get("zwj").toString();
        //合并单元格
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,0,2));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,3,3));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,4,5));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,6,6));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,7,8));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,9,9));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,10,11));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,12,12));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,13,14));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,15,15));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,16,17));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,18,20));
        sheet.addMergedRegion(new CellRangeAddress(rowNum,rowNum,21,23));
        //数据
        Row rzong = sheet.createRow(rowNum++);
        rzong.setHeight((short) 700);
        String[] row_zongji = {"总计", "","",zm1, zw1, "",zm2, zw2, "",zm3, zw3,"",zm4, zw4,"",zm5, zw5,"",zmj,"","", zwj,"",""};
        for (int i = 0; i < row_zongji.length; i++) {
            Cell tempCell = rzong.createCell(i);
            tempCell.setCellValue(row_zongji[i]);
            tempCell.setCellStyle(commonStyle);
        }
   
   
        //输出
        OutputStream stream = null;
        try {
            // 文件名
            String fileName = "报表名称.xls";
   
            // 处理文件名包含特殊字符出现的乱码问题
            String userAgent = request.getHeader("User-Agent");
            if (oConvertUtils.isNotEmpty(userAgent)) {
                userAgent = userAgent.toLowerCase();
                if (userAgent.contains("msie") || userAgent.contains("trident") || userAgent.contains("edge")) {
                    if (fileName.length() > 150) {// 解决IE 6.0问题
                        fileName = new String(fileName.getBytes("UTF-8"), "ISO-8859-1");
                    } else {
                        fileName = URLEncoder.encode(fileName, "UTF-8");
                    }
                } else {
                    fileName = new String(fileName.getBytes("UTF-8"), "ISO-8859-1");
                }
            }
   
            response.setContentType("application/vnd.ms-excel");
            response.setHeader("Content-disposition", "attachment;filename=\"" + fileName + "\"");
            stream = response.getOutputStream();
   
            if (null != hssfWorkbook && null != stream) {
                hssfWorkbook.write(stream);
                stream.flush();
                stream.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
   
   

   渲染数据的时候，由于我得到的数据结构不是很合理，所以很多地方都是直接指明的^_^