用HSSFSheet创建复杂的excel表格

       用HSSFSheet可以很方便的创建如下复杂的excel表格：

商户名称	月份	订单状态	订单数量	现金总额(元)	投诉件数
NIKE	2010-11	未支付	0	0.00	5
		支付中	0	0.00
		待发货	3	0.00
		已发货	0	0.00
		已签收	0	0.00
		已支付	0	0.00
		已完结	0	0.00
		已取消	0	0.00
		已退费	0	0.00
		未核实	0	0.00
		全部	3	0.00
红双喜	2010-11	未支付	0	0.00	13
		支付中	2	5,495.00
		待发货	0	0.00
		已发货	2	3,297.00
		已签收	0	0.00
		已支付	0	0.00
		已完结	0	0.00
		已取消	0	0.00
		已退费	0	0.00
		未核实	0	0.00
		全部	4	8,792.00
总和	14	26,278.51	18

得导入poi.jar包，代码如下：

 public void export() throws ServiceException, IOException{
        NumberFormat nf = NumberFormat.getInstance();
        nf.setMaximumFractionDigits(2);
        nf.setMinimumFractionDigits(2);
        HSSFWorkbook wb = new HSSFWorkbook();
        HSSFSheet sheet = wb.createSheet();
        this.initSheet(sheet);//初始化sheet，设置列数和每列宽度
        HSSFCellStyle centerStyle = wb.createCellStyle();//设置为水平居中
        centerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        centerStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        HSSFCellStyle rightStyle = wb.createCellStyle();//水平靠右
        rightStyle.setAlignment(HSSFCellStyle.ALIGN_RIGHT);
        rightStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        this.initHeader(sheet, centerStyle);//初始化头部为水平居中
        List list = service.listReport(orderReportVo);//拿出数据
        int orderCount = 0;
        int INTEGRAL = 0;
        double cash = 0;
        int complaintCount = 0;
        //整理数据
        Map> map = new TreeMap>();
        for(int i = 0; i < list.size(); i++){
            OrderReportVo vo = (OrderReportVo) list.get(i);
            orderCount += vo.getOrderCount();
            cash += vo.getCashAmount();
            complaintCount += vo.getComplaintCount();
            String key = vo.getMerchantCode() + vo.getMonth();
            Map tempMap = map.get(key);
            if(tempMap == null){
                tempMap = new HashMap();
                OrderReportVo tempVo = new OrderReportVo();
                tempVo.setMerchantName(vo.getMerchantName());
                tempVo.setCashAmount(0.0);
                tempVo.setOrderCount(0);
                tempVo.setMonth(vo.getMonth());
                tempVo.setComplaintCount(0);

                for (int j = 0; j < status.length; j++) {
                    tempMap.put(status[j], tempVo);
                }
                map.put(key, tempMap);
            }
            tempMap.put(vo.getOrderStatus(), vo);
        }
        if(!AssertUtil.isEmpty(map)){
            int rowNumPerMerchant = 11;//每个商家一个月的统计记录占11个表格，10个订单状态+1个全部（统计）
            int rowNum = 0;
            int merchantCount = 0;//记录数
            //按要求创建各单元格
            for(Map report : map.values()){
                merchantCount++;
                HSSFRow row = sheet.createRow(++rowNum);
                OrderReportVo vo0 = report.get(0);
                int OrderCountPerMerchant = vo0.getOrderCount();
                int ComplaintCountPerMerchant = vo0.getComplaintCount();
                double CashAmountPerMerchant = vo0.getCashAmount();
                
                this.createCell(row, 0, vo0.getMerchantName() , centerStyle);
                this.createCell(row, 1, vo0.getMonth(), centerStyle);
                sheet.addMergedRegion(new Region(rowNum,(short)0,rowNum + 10,(short)0));
                sheet.addMergedRegion(new Region(rowNum,(short)1,rowNum + 10,(short)1));
                this.createCell(row, 2, orderStatusToString(0), centerStyle);
                this.createCell(row, 3, vo0.getOrderCount(), rightStyle);
                this.createCell(row, 4, nf.format(vo0.getCashAmount()), rightStyle);
                
                //循环按订单状态设置单元格，（i从1开始）
                for (int i = 1; i < status.length; i++) {
                    OrderReportVo vo = report.get(status[i]);
                    OrderCountPerMerchant += vo.getOrderCount();
                    ComplaintCountPerMerchant += vo.getComplaintCount();
                    CashAmountPerMerchant += vo.getCashAmount();
                        
                    HSSFRow row2 = sheet.createRow(++rowNum);
                    this.createCell(row2, 2, orderStatusToString(status[i]), centerStyle);//订单状态
                    this.createCell(row2, 3, vo.getOrderCount(), rightStyle);//订单数量
                    //this.createCell(row2, 4, vo2.getIntegralAmount(), rightStyle);
                    this.createCell(row2, 4, nf.format(vo.getCashAmount()), rightStyle);//现金总额
                }
                HSSFRow allrow = sheet.createRow(++rowNum);
                this.createCell(allrow, 2, "全部", centerStyle);
                this.createCell(allrow, 3, OrderCountPerMerchant, rightStyle);
                //this.createCell(row, 4, INTEGRAL, rightStyle);
                this.createCell(allrow, 4, nf.format(CashAmountPerMerchant), rightStyle);
                int rowIndex = (merchantCount-1)*rowNumPerMerchant;//计算投诉件数单元格的行数位置
                HSSFRow row0 = sheet.createRow(rowIndex+1);
                this.createCell(row0, 5, ComplaintCountPerMerchant, centerStyle);//投诉件数
                sheet.addMergedRegion(new Region(rowIndex+1,(short)5,rowIndex+11,(short)5));
                
            }
            //底部总结单元格
            HSSFRow row = sheet.createRow(++rowNum);
            this.createCell(row, 2, "总和", centerStyle);
            this.createCell(row, 3, orderCount, rightStyle);
            //this.createCell(row, 4, INTEGRAL, rightStyle);
            this.createCell(row, 4, nf.format(cash), rightStyle);
            this.createCell(row, 5, complaintCount, centerStyle);//投诉件数
            
        }
        response.setContentType("application/ms-excel;charset=UTF-8");
        response.setHeader("Content-disposition", "attachment; filename=" + new String("订单统计报表".getBytes("GBK"), "ISO-8859-1") + ".xls");
        OutputStream out = response.getOutputStream();
        wb.write(out);
        out.flush();
        out.close();
        
    }

其中

    //10种订单状态    private final int[] status = new int[]{0,1,2,3,4,5,6,-1,-2,-3};

初始化sheet

    //初始化sheet，设置列数和每列宽度
    private void initSheet(HSSFSheet sheet){
        sheet.setColumnWidth((short)0, (short) (35.7 * 150));
        sheet.setColumnWidth((short)1, (short)(35.7 * 100));
        sheet.setColumnWidth((short)2, (short)(35.7 * 150));
        sheet.setColumnWidth((short)3, (short)(35.7 * 60));
        sheet.setColumnWidth((short)4, (short)(35.7 * 120));
        sheet.setColumnWidth((short)5, (short)(35.7 * 120));
    }

初始化sheet样式

 /**
     * 初始化sheet样式
     * @param sheet
     * @param style
     */
    private void initHeader(HSSFSheet sheet,HSSFCellStyle style){
        HSSFRow row1 = sheet.createRow((short) 0);
        createCell(row1, 0, "商户名称", style);
        createCell(row1, 1, "月份", style);
        createCell(row1, 2, "订单状态", style);
        createCell(row1, 3, "订单数量", style);
        createCell(row1, 4, "现金总额(元)", style);
        createCell(row1, 5, "投诉件数", style);
    }

 

创建单元格

 /**
     * 创建单元格
     * @param row 行
     * @param column 列位置
     * @param value 值
     * @param style 样式
     */
    private void createCell(HSSFRow row,int column,Object value,HSSFCellStyle style){
        HSSFCell cell = row.createCell((short)column);
        cell.setEncoding((short) 1);
        cell.setCellValue(String.valueOf(value));
        cell.setCellStyle(style);
    } 

private  String orderStatusToString(int code){
        switch (code) {
        case 0:
            return "未支付";
        case 1:
            return "支付中";
        case 2:
            return "待发货";
        case 3:
            return "已发货";
        case 4:
            return "已签收";
        case 5:
            return "已支付";
        case 6:
            return "已完结";
        case -1:
            return "已取消";
        case -2:
            return "已退费";
        case -3:
            return "未核实";
        default:
            return null;
        }
        
    }