• POI导出Excel表格(多行表头、合并单元格)


    Controller

    @RequestMapping("/excel/export/common")
    public void exportExcelCommon(HttpServletRequestrequest, HttpServletResponse response )throws IOException{
    
            List<TParams> list = new ArrayList<>();
            List<TParams> params = paramService.getlist();
            for (TParams tParams : params) {
                list.add(tParams);
            }
            HSSFWorkbook wb = paramService.exportCommon(list);
            response.setContentType("application/vnd.ms-excel");
            response.addHeader("Content-Disposition", "attachment;filename="+ java.net.URLEncoder.encode("通用参数列表", "UTF-8")+".xls");  
            OutputStream outputStream = response.getOutputStream();
            wb.write(outputStream);
            outputStream.flush();
            outputStream.close();
        } 

    ServiceImpl

    @SuppressWarnings("deprecation")
        @Override
        public HSSFWorkbook export(List<TAQIDataReport> list) {
    
            // 声明String数组,并初始化元素(表头名称)
            //第一行表头字段,合并单元格时字段跨几列就将该字段重复几次
            String[] excelHeader0 = { "城市名称", "监测点", "污染物浓度及空气质量分指数(AQI)", "污染物浓度及空气质量分指数(AQI)", "污染物浓度及空气质量分指数(AQI)",
                    "污染物浓度及空气质量分指数(AQI)", "污染物浓度及空气质量分指数(AQI)", "污染物浓度及空气质量分指数(AQI)", "污染物浓度及空气质量分指数(AQI)",
                    "污染物浓度及空气质量分指数(AQI)", "污染物浓度及空气质量分指数(AQI)", "污染物浓度及空气质量分指数(AQI)", "污染物浓度及空气质量分指数(AQI)",
                    "污染物浓度及空气质量分指数(AQI)", "空气质量指数(AQI)", "首要污染物", "空气质量指数级别", "空气质量指数类别", "空气质量指数类别" };
               //  “0,2,0,0”  ===>  “起始行,截止行,起始列,截止列”
            String[] headnum0 = { "0,2,0,0", "0,2,1,1", "0,0,2,13", "0,2,14,14", "0,2,15,15", "0,2,16,16", "0,1,17,18" };
    
            //第二行表头字段,其中的空的双引号是为了补全表格边框
            String[] excelHeader1 = { "二氧化硫(SO₂)24小时平均", "二氧化硫(SO₂)24小时平均", "二氧化氮(NO₂)24小时平均", "二氧化氮(NO₂)24小时平均",
                    "颗粒物(粒径小于等于10μm)24小时平均", "颗粒物(粒径小于等于10μm)24小时平均", "一氧化碳(CO)24小时平均", "一氧化碳(CO)24小时平均", "臭氧(O₃)最大8小时平均",
                    "臭氧(O₃)最大8小时平均", "颗粒物(粒径小于等于2.5μm)24小时平均", "颗粒物(粒径小于等于2.5μm)24小时平均","","","","","" };
            // 合并单元格
            String[] headnum1 = { "1,1,2,3", "1,1,4,5", "1,1,6,7", "1,1,8,9", "1,1,10,11", "1,1,12,13" };
    
            //第三行表头字段
            String[] excelHeader2 = {  "", "", "浓度/(μg/m3)", "分指数", "浓度/(μg/m3)", "分指数", "浓度/(μg/m3)", "分指数", "浓度/(μg/m3)", "分指数",
                    "浓度/(μg/m3)", "分指数", "浓度/(μg/m3)", "分指数","", "类别", "颜色" };
    
            String[] headnum2 = { "2,2,2,2", "2,2,3,3", "2,2,4,4", "2,2,5,5", "2,2,6,6", "2,2,7,7", "2,2,8,8", "2,2,9,9",
                    "2,2,10,10", "2,2,11,11", "2,2,12,12", "2,2,13,13", "2,2,17,17", "2,2,18,18" };
    
            // 声明一个工作簿
            HSSFWorkbook wb = new HSSFWorkbook();
            // 生成一个表格
            HSSFSheet sheet = wb.createSheet("TAQIDataReport");
    
            // 生成一种样式
            HSSFCellStyle style = wb.createCellStyle();
            // 设置样式
            style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
            style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
            style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
            style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
            style.setBorderRight(HSSFCellStyle.BORDER_THIN);
            style.setBorderTop(HSSFCellStyle.BORDER_THIN);
            style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
            style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
    
            // 生成一种字体
            HSSFFont font = wb.createFont();
            // 设置字体
            font.setFontName("微软雅黑");
            // 设置字体大小
            font.setFontHeightInPoints((short) 12);
            // 字体加粗
            font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
            // 在样式中引用这种字体
            style.setFont(font);
    
            // 生成并设置另一个样式
            HSSFCellStyle style2 = wb.createCellStyle();
            style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
            style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
            style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
            style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
            style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
            style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
            style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
            style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
    
            // 生成另一种字体2
            HSSFFont font2 = wb.createFont();
            // 设置字体
            font2.setFontName("微软雅黑");
            // 设置字体大小
            font2.setFontHeightInPoints((short) 12);
            // 字体加粗
            // font2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
            // 在样式2中引用这种字体
            style2.setFont(font2);
    
            // 生成表格的第一行
            // 第一行表头
            HSSFRow row = sheet.createRow(0);
            for (int i = 0; i < excelHeader0.length; i++) {
    
                sheet.autoSizeColumn(i, true);// 根据字段长度自动调整列的宽度
                HSSFCell cell = row.createCell(i);
                cell.setCellValue(excelHeader0[i]);
                cell.setCellStyle(style);
    
                // System.out.println(excelHeader0[i]);
    
                if (i >= 0 && i <= 18) {
                    for (int j = 0; j < excelHeader0.length; j++) {
                        // 从第j列开始填充
                        cell = row.createCell(j);
                        // 填充excelHeader1[j]第j个元素
                        cell.setCellValue(excelHeader0[j]);
                        cell.setCellStyle(style);
                    }
    
                }
    
                // 设置列宽
    
                // sheet.setColumnWidth(0, 5500);
                // sheet.setColumnWidth(1, 6500);
                // sheet.setColumnWidth(2, 6500);
                // sheet.setColumnWidth(3, 6000);
                // sheet.setColumnWidth(4, 6500);
                // sheet.setColumnWidth(5, 6500);
                // sheet.setColumnWidth(6, 6500);
                // sheet.setColumnWidth(7, 6500);
                // sheet.setColumnWidth(8, 6500);
                // sheet.setColumnWidth(9, 6500);
                // sheet.setColumnWidth(10, 6500);
                // sheet.setColumnWidth(11, 6500);
                // sheet.setColumnWidth(12, 6500);
                // sheet.setColumnWidth(13, 6500);
                // sheet.setColumnWidth(14, 6500);
                // sheet.setColumnWidth(15, 6500);
                // sheet.setColumnWidth(16, 6500);
                // sheet.setColumnWidth(17, 6500);
                // sheet.setColumnWidth(18, 6500);
                // sheet.setDefaultRowHeight((short) 360);// 设置行高
    
            }
    
            // 动态合并单元格
            for (int i = 0; i < headnum0.length; i++) {
    
                sheet.autoSizeColumn(i, true);
                String[] temp = headnum0[i].split(",");
                Integer startrow = Integer.parseInt(temp[0]);
                Integer overrow = Integer.parseInt(temp[1]);
                Integer startcol = Integer.parseInt(temp[2]);
                Integer overcol = Integer.parseInt(temp[3]);
                sheet.addMergedRegion(new CellRangeAddress(startrow, overrow, startcol, overcol));
            }
    
            // 第二行表头
            row = sheet.createRow(1);
            for (int i = 0; i < excelHeader1.length; i++) {
    
                sheet.autoSizeColumn(i, true);// 自动调整宽度
                HSSFCell cell = row.createCell(i + 1);
                cell.setCellValue(excelHeader1[i]);
                cell.setCellStyle(style);
    
                if (i >= 2 && i <= 18) {
                    for (int j = 0; j < excelHeader1.length; j++) {
                        // 从第j+1列开始填充
                        cell = row.createCell(j + 2);
                        // 填充excelHeader1[j]第j个元素
                        cell.setCellValue(excelHeader1[j]);
                        cell.setCellStyle(style);
                    }
                }
            }
    
            // 动态合并单元格
            for (int i = 0; i < headnum1.length; i++) {
    
                sheet.autoSizeColumn(i, true);
                String[] temp = headnum1[i].split(",");
                Integer startrow = Integer.parseInt(temp[0]);
                Integer overrow = Integer.parseInt(temp[1]);
                Integer startcol = Integer.parseInt(temp[2]);
                Integer overcol = Integer.parseInt(temp[3]);
                sheet.addMergedRegion(new CellRangeAddress(startrow, overrow, startcol, overcol));
            }
            // 第三行表头
            row = sheet.createRow(2);
            for (int i = 0; i < excelHeader2.length; i++) {
    
                HSSFCell cell = row.createCell(i + 2);
                cell.setCellValue(excelHeader2[i]);
                cell.setCellStyle(style);
                // System.out.println(excelHeader2[i]);
                sheet.autoSizeColumn(i, true);// 自动调整宽度
    
                if (i > 1 && i <= 18) {
                    for (int j = 0; j < excelHeader2.length; j++) {
                        // 从第j+2列开始填充
                        cell = row.createCell(j);
                        // 填充excelHeader1[j]第j个元素
                        cell.setCellValue(excelHeader2[j]);
                        cell.setCellStyle(style);
                    }
                }
            }
            // 动态合并单元格
            for (int i = 0; i < headnum2.length; i++) {
    
                sheet.autoSizeColumn(i, true);
                String[] temp = headnum2[i].split(",");
                Integer startrow = Integer.parseInt(temp[0]);
                Integer overrow = Integer.parseInt(temp[1]);
                Integer startcol = Integer.parseInt(temp[2]);
                Integer overcol = Integer.parseInt(temp[3]);
                sheet.addMergedRegion(new CellRangeAddress(startrow, overrow, startcol, overcol));
            }
    
            // 第四行数据
            for (int i = 0; i < list.size(); i++) {
    
                row = sheet.createRow(i + 3);
                TAQIDataReport report = list.get(i);
    
                // 导入对应列的数据
                HSSFCell cell = row.createCell(0);
                cell.setCellValue(report.getCity());
                cell.setCellStyle(style2);
    
                HSSFCell cell1 = row.createCell(1);
                cell1.setCellValue(report.getAdd());
                cell1.setCellStyle(style2);
    
                HSSFCell cell2 = row.createCell(2);
                cell2.setCellValue(report.getSo2Concentration());
                cell2.setCellStyle(style2);
                HSSFCell cell3 = row.createCell(3);
                cell3.setCellValue(report.getSo2Subindex());
                cell3.setCellStyle(style2);
    
                HSSFCell cell4 = row.createCell(4);
                cell4.setCellValue(report.getNo2Concentration());
                cell4.setCellStyle(style2);
                HSSFCell cell5 = row.createCell(5);
                cell5.setCellValue(report.getNo2Subindex());
                cell5.setCellStyle(style2);
    
                HSSFCell cell6 = row.createCell(6);
                cell6.setCellValue(report.getPm10Concentration());
                cell6.setCellStyle(style2);
                HSSFCell cell7 = row.createCell(7);
                cell7.setCellValue(report.getPm10Subindex());
                cell7.setCellStyle(style2);
    
                HSSFCell cell8 = row.createCell(8);
                cell8.setCellValue(report.getCoConcentration());
                cell8.setCellStyle(style2);
                HSSFCell cell9 = row.createCell(9);
                cell9.setCellValue(report.getCoSubindex());
                cell9.setCellStyle(style2);
    
                HSSFCell cell10 = row.createCell(10);
                cell10.setCellValue(report.getO3Concentration());
                cell10.setCellStyle(style2);
                HSSFCell cell11 = row.createCell(11);
                cell11.setCellValue(report.getO3Subindex());
                cell11.setCellStyle(style2);
    
                HSSFCell cell12 = row.createCell(12);
                cell12.setCellValue(report.getPm25Concentration());
                cell12.setCellStyle(style2);
                HSSFCell cell13 = row.createCell(13);
                cell13.setCellValue(report.getPm25Subindex());
                cell13.setCellStyle(style2);
    
                HSSFCell cell14 = row.createCell(14);
                cell14.setCellValue(report.getAirSubindex());
                cell14.setCellStyle(style2);
    
                HSSFCell cell15 = row.createCell(15);
                cell15.setCellValue(report.getKeyPollution());
                cell15.setCellStyle(style2);
    
                HSSFCell cell16 = row.createCell(16);
                cell16.setCellValue(report.getLevel());
                cell16.setCellStyle(style2);
    
                HSSFCell cell17 = row.createCell(17);
                cell17.setCellValue(report.getType());
                cell17.setCellStyle(style2);
    
                HSSFCell cell18 = row.createCell(18);
                cell18.setCellValue(report.getColor());
                cell18.setCellStyle(style2);
            }
            return wb;
        }

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  • 原文地址:https://www.cnblogs.com/wangbin96/p/12723895.html
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