jxl 导入导出Excel（有模板）

1、导入

    @Override
    public String importBusinessScope(File file, String unit_id) throws Exception {
        Workbook wb = Workbook.getWorkbook(file);// 从文件流中取得Excel工作区对象
        Sheet sheet = wb.getSheet(0);

        Range[] rangeCell = sheet.getMergedCells();// 合并单元格

        StringBuilder validateMessage = new StringBuilder();
        BusinessScopeItem businessScopeItem = null;
        BusinessScopeSubItem businessScopeSubItem = null;
        List<BusinessScopeSubItem> businessScopeSubItemList = new ArrayList<>();
        for (int i = 4; i < sheet.getRows(); i++) {
            businessScopeItem = new BusinessScopeItem();
            businessScopeSubItem = new BusinessScopeSubItem();
            // 事项
            String item_id = "";
            String item = sheet.getCell(1, i).getContents();
            for (Range r : rangeCell) {
                if (i > r.getTopLeft().getRow() && i <= r.getBottomRight().getRow() && 1 >= r.getTopLeft().getColumn()
                        && 1 <= r.getBottomRight().getColumn()) {
                    item = sheet.getCell(r.getTopLeft().getColumn(), r.getTopLeft().getRow()).getContents();
                }
            }
            businessScopeItem.setItem(item);
            businessScopeItem.setIsdel("0");
            List<BusinessScopeItem> businessScopeItemList = businessScopeItemDao.selectAllItemList(businessScopeItem);
            if (businessScopeItemList != null && businessScopeItemList.size() > 0) {
                item_id = businessScopeItemList.get(0).getItem_id();
            } else {
                businessScopeItem.setUnit_id(unit_id);
                businessScopeItem.setCreatedate(DateTime.toLocaleStringYYYYMMDD());
                item_id = businessScopeItemDao.insertItem(businessScopeItem);
            }

            // 子事项
            String subitem = sheet.getCell(2, i).getContents();
            for (Range r : rangeCell) {
                if (i > r.getTopLeft().getRow() && i <= r.getBottomRight().getRow() && 2 >= r.getTopLeft().getColumn()
                        && 2 <= r.getBottomRight().getColumn()) {
                    subitem = sheet.getCell(r.getTopLeft().getColumn(), r.getTopLeft().getRow()).getContents();
                }
            }
            businessScopeSubItem.setItem_id(item_id);
            businessScopeSubItem.setSubitem(subitem);
            businessScopeSubItem.setIsdel("0");
            int count = businessScopeSubItemDao.selectCountSubItemByItemAndSubItem(businessScopeSubItem);
            if (count > 0) {
                validateMessage.append("第").append(i + 1).append("行,事项(").append(item).append(")和子事项(").append(subitem)
                        .append(")已存在；");
            } else {
                businessScopeSubItem.setItem(item);
            }

            // 主要内容
            String content = sheet.getCell(3, i).getContents();
            for (Range r : rangeCell) {
                if (i > r.getTopLeft().getRow() && i <= r.getBottomRight().getRow() && 3 >= r.getTopLeft().getColumn()
                        && 3 <= r.getBottomRight().getColumn()) {
                    content = sheet.getCell(r.getTopLeft().getColumn(), r.getTopLeft().getRow()).getContents();
                }
            }
            businessScopeSubItem.setContent(content);

            // 实施依据
            String rules = sheet.getCell(4, i).getContents();
            for (Range r : rangeCell) {
                if (i > r.getTopLeft().getRow() && i <= r.getBottomRight().getRow() && 4 >= r.getTopLeft().getColumn()
                        && 4 <= r.getBottomRight().getColumn()) {
                    rules = sheet.getCell(r.getTopLeft().getColumn(), r.getTopLeft().getRow()).getContents();
                }
            }
            businessScopeSubItem.setRules(rules);

            // 实施期限
            String limitdate = sheet.getCell(5, i).getContents();
            for (Range r : rangeCell) {
                if (i > r.getTopLeft().getRow() && i <= r.getBottomRight().getRow() && 5 >= r.getTopLeft().getColumn()
                        && 5 <= r.getBottomRight().getColumn()) {
                    limitdate = sheet.getCell(r.getTopLeft().getColumn(), r.getTopLeft().getRow()).getContents();
                }
            }
            businessScopeSubItem.setLimitdate(limitdate);

            // 创建日期
            businessScopeSubItem.setCreatedate(DateTime.toLocaleStringYYYYMMDD());
            businessScopeSubItemList.add(businessScopeSubItem);
        }
        wb.close();

        if (validateMessage.length() > 0) {
            return validateMessage.toString();
        } else {
            for (BusinessScopeSubItem subItem : businessScopeSubItemList) {
                businessScopeSubItemDao.insertSubItem(subItem);
            }
        }

        return "0";
    }

2、导出

    @Override
    public String exportBusinessScope(BusinessScopeItem businessScopeItem, HttpServletResponse response)
            throws Exception {
        // 获取导出数据
        List<BusinessScopeItem> businessScopeItemList = businessScopeItemDao.selectAllBusinessScopeList(businessScopeItem);
        if (businessScopeItemList != null && businessScopeItemList.size() > 0) {
            // 模板入径
            String templePath = getClass().getResource("/").getPath();
            int index = templePath.indexOf("WebContent");
            templePath = templePath.substring(0, index + 10) + "/website/enroll/businessscope/businessScopeModel.xls";

            // 读取模板文件
            Workbook wb = Workbook.getWorkbook(new File(templePath));
            // 取得输出流
            OutputStream os = response.getOutputStream();
            // 清空输出流
            response.reset();
            // 下面是对中文文件名的处理,设置相应内容的编码格式
            response.setCharacterEncoding("UTF-8");
            // 设置文件的默认文件名
            response.setHeader("Content-Disposition", "attachment;filename=businessScopeModel.xls");
            // 定义输出类型
            response.setContentType("application/msexcel");
            // 建立Excel文件
            WritableWorkbook book = Workbook.createWorkbook(os, wb);
            // 通过索引，获取模板文件中的sheet页第一页
            WritableSheet sheet = book.getSheet(0);
            // 实例化表格格式
            // 设置单元格纵横居中
            WritableCellFormat wcfCenter = new WritableCellFormat();
            wcfCenter.setAlignment(Alignment.CENTRE);
            wcfCenter.setVerticalAlignment(VerticalAlignment.CENTRE);
            // 是否自动换行
            wcfCenter.setWrap(true); 
            // 设置表格线为细线，黑色
            wcfCenter.setBorder(Border.ALL, BorderLineStyle.THIN, Colour.BLACK);
            
            // 设置单元格水平靠左，上下居中
            WritableCellFormat wcfLeft = new WritableCellFormat();
            wcfLeft.setAlignment(Alignment.LEFT);
            wcfLeft.setVerticalAlignment(VerticalAlignment.CENTRE);
            // 是否自动换行
            wcfLeft.setWrap(true); 
            // 设置表格线为细线，黑色
            wcfLeft.setBorder(Border.ALL, BorderLineStyle.THIN, Colour.BLACK);

            // 写入Excel
            int i = 4;
            int seq = 0;
            for (BusinessScopeItem item : businessScopeItemList) {
                List<BusinessScopeSubItem> businessScopeSubItemList = item.getBusinessScopeSubItemList();
                int subItemCount = 0;
                if (businessScopeSubItemList != null && businessScopeSubItemList.size() > 0) {
                    subItemCount = businessScopeSubItemList.size() -1;
                }
                // 是否需要合并单元格
                if (subItemCount > 0) {
                    // 设置第1列、第4行到第1列、第subItemCount行合并
                    sheet.mergeCells(0, i, 0, i + subItemCount);
                    sheet.mergeCells(1, i, 1, i + subItemCount);
                }

                // 序号
                seq++;
                // 实例化单元格内容，并应用样式对单元格进行处理
                Label label_Seq = new Label(0, i, String.valueOf(seq), wcfCenter);
                // 将内容添加入单元格中
                sheet.addCell(label_Seq);

                // 事项
                Label label_item = new Label(1, i, item.getItem(), wcfCenter);
                sheet.addCell(label_item);

                // 子事项相关信息
                if (businessScopeSubItemList != null) {
                    int j = i;
                    for (BusinessScopeSubItem subItem : businessScopeSubItemList) {
                        // 子事项
                        Label label_subitem = new Label(2, j, subItem.getSubitem(), wcfCenter);
                        sheet.addCell(label_subitem);

                        // 主要内容
                        Label label_content = new Label(3, j, subItem.getContent(), wcfLeft);
                        sheet.addCell(label_content);

                        // 实施依据
                        Label label_rules = new Label(4, j, subItem.getRules(), wcfLeft);
                        sheet.addCell(label_rules);

                        // 实施期限
                        Label label_limitdate = new Label(5, j, subItem.getLimitdate(), wcfCenter);
                        sheet.addCell(label_limitdate);

                        // 重定向行
                        j++;
                    }
                }
                
                // 重定向行
                i += subItemCount + 1;
            }
            
            // 尾部
            // 设置行高
            sheet.setRowView(i, 1500, false);
            // 合并单元格
            sheet.mergeCells(0, i, 1, i);
            sheet.mergeCells(2, i, 5, i);
            // 填充数据
            Label label_bottom1 = new Label(0, i, "举办单位审核意见", wcfCenter);
            sheet.addCell(label_bottom1);
            
            // 设置单元格水平靠右，垂直靠下
            WritableCellFormat wcfBottom = new WritableCellFormat();
            wcfBottom.setAlignment(Alignment.RIGHT);
            wcfBottom.setVerticalAlignment(VerticalAlignment.BOTTOM);
            // 是否自动换行
            wcfBottom.setWrap(true);
            // 设置表格线为细线，黑色
            wcfBottom.setBorder(Border.ALL, BorderLineStyle.THIN, Colour.BLACK);
            
            Calendar calendar = Calendar.getInstance();
            String year = String.valueOf(calendar.get(Calendar.YEAR));
            Label label_bottom2 = new Label(2, i, "（公章）                          
" + year + "年    月    日                    
", wcfBottom);
            sheet.addCell(label_bottom2);

            book.write();// 写入表格
            book.close();// 结束表格编写
            os.close();// 关闭数据流
        } else {
            return "没有数据！";
        }
        return "0";
    }