java数据导出成 EXCEL

/**
     * 
     * @param out 输出流
     * @param maplist 数据
     * @param title 标题
     * @param headers 表头
     * @param keys 表头对应的字段名
     * @return
     */
    public static boolean getExcelDao(OutputStream out,
            List<Map<String, Object>> maplist, String title, String[] headers,String keys[]) {
        try {
            // 创建一个工作薄
            HSSFWorkbook workbook = new HSSFWorkbook();
            // 创建一个带有名称的工作页
            HSSFSheet sheet = workbook.createSheet(title);
            
            sheet.setDefaultColumnWidth(25);
            
            // 生成一个样式
            HSSFCellStyle style = workbook.createCellStyle();
            // 设置这些样式
            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);
            // 生成一个字体
            HSSFFont font = workbook.createFont();
            font.setColor(HSSFColor.VIOLET.index);
            font.setFontHeightInPoints((short) 12);
            font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
            // 把字体应用到当前的样式
            style.setFont(font);
            
            
            // 生成并设置另一个样式
            HSSFCellStyle style2 = workbook.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);
            // 生成另一个字体
            HSSFFont font2 = workbook.createFont();
            font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
            // 把字体应用到当前的样式
            style2.setFont(font2);
            
            
            
            
            // 产生坐标行
            // 标题行
            HSSFRow row = sheet.createRow(0);
            HSSFCell cell = row.createCell(0);
            cell.setCellStyle(style);
            
            cell.setCellValue(title);
            // 使标题居中，合并单元格 四个参数 起始行列 结束行列
            if (headers != null && headers.length > 0)
                sheet.addMergedRegion(new CellRangeAddress(0, 0, 0,
                        headers.length - 1));
            else
                sheet.addMergedRegion(new CellRangeAddress(0, 0, 0, 1));

            // 产生表头
            row = sheet.createRow(1);
            for (int i = 0; i < headers.length; i++) {
                cell = row.createCell(i);
                cell.setCellStyle(style);
                cell.setCellValue(headers[i]);
            }
            // 产生内容
            for (int i = 0; i < maplist.size(); i++) {

                Map<String, Object> objectmap = maplist.get(i);
                row = sheet.createRow(i + 2);
                int count = 0;//遍历MAP
                for(String key:keys){
                    cell = row.createCell(count);
                    cell.setCellStyle(style2);
                    cell.setCellValue(String.valueOf(objectmap.get(key)).equals("null")?"":objectmap.get(key)+"");
                    count++;
                }
                /*for (Entry<String, Object> entry : objectmap.entrySet()) {
                    // System.out.println("key= " + entry.getKey() +
                    // " and value= " + entry.getValue());
                    cell = row.createCell(count);
                    cell.setCellValue(entry.getValue().toString());
                    count++;
                }*/

            }
            try {
                workbook.write(out);
                return true;
            } catch (IOException e) {

                e.printStackTrace();
                return false;
            }finally {
                workbook.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }


使用

String keys[]={"id","mname","o3title","num","userid","useraddress","Getphone","postname","postage","flagname","buildtime","kjtime"};
            String headers[]={"订单号","品类","商品名称","夺宝次数","用户ID","地址","号码","快递","快递单号","订单状态","下单时间","开奖时间"};
                    //orderServiceImpl.query_queryListAll(query, columns, tablename, sort)
            //System.out.println(maplist.toString());
            OutputStream outputStream = response.getOutputStream();
            ExcelUtil.getExcelDao(outputStream, maplist2, title, headers, keys);
            outputStream.close();