java分页数据导出excel

** 
     * 订单导出（用于统计利润） 
     * @return 
     */  
    public String orderExport() throws IOException{  
        if (queryOrderList_currentPage == null || queryOrderList_currentPage <= 0) {  
            queryOrderList_currentPage = 1;  
        }  
        OrderInfo order = new OrderInfo();  
        if (!StringUtil.isNull(queryOrderList_orderStatus)) {  
            order.setOrderStatus(queryOrderList_orderStatus);  
        }  
        if (!StringUtil.isNull(queryOrderList_orderCard)) {  
            order.setOrderCard(queryOrderList_orderCard);  
        }  
        if (!StringUtil.isNull(queryOrderList_memberPhone)) {  
            order.setMemberPhone(queryOrderList_memberPhone);  
        }  
        if (!StringUtil.isNull(queryOrderList_memberContactsPhone)) {  
            order.setMemberContactsPhone(queryOrderList_memberContactsPhone);  
        }  
        if (queryOrderList_businessId != null && queryOrderList_businessId > 0) {  
            order.setBusinessId(queryOrderList_businessId);  
        }  
        if (!StringUtil.isNull(queryOrderList_addressDesc)) {  
            order.setAddressDesc(queryOrderList_addressDesc);  
        }  
          
        if (!StringUtil.isNull(queryOrderList_beginTime) && !StringUtil.isNull(queryOrderList_endTime)) {  
            order.setBeginTime(queryOrderList_beginTime);  
            order.setEndTime(queryOrderList_endTime);  
        }  
          
        try {  
            HttpServletResponse response = ServletActionContext.getResponse();  
            queryOrderList_pageBean = statisticsService.queryOrderListByCompanyConditions(order,queryOrderList_currentPage, queryOrderList_pageSize);  
            int totalPage = queryOrderList_pageBean.getTotalPage();  
            response.reset();   
            SimpleDateFormat sdFormat = new SimpleDateFormat("yyyy-MM-dd");  
            String fname= "订单导出"+sdFormat.format(new Date());  
            fname=new String(fname.getBytes("GBK"),"ISO_8859_1");//文件名称{避免出现乱码}   
            response.setHeader("Content-disposition", "attachment; filename="+fname+".csv");// 设定输出文件头  
            response.setContentType("text/csv");   
            response.setCharacterEncoding("UTF-8");   
            OutputStream out = response.getOutputStream();  
            String sep = ",";   
            //列名  
            for(int column=0;column<CompanyConfig.ORDER_EXPORT_COLUMN.split(",").length;column++){  
                out.write(CompanyConfig.ORDER_EXPORT_COLUMN.split(",")[column].getBytes());   
                out.write(sep.getBytes());   
            }  
            //换行符  
            out.write(System.getProperty("line.separator").getBytes());  
            //数据  
            OrderInfo newOrderInfo =new OrderInfo();  
            if(queryOrderList_pageBean.getList()!=null && queryOrderList_pageBean.getList().size()>0){  
                for (int i = 0; i < queryOrderList_pageBean.getList().size(); i++) {  
                    newOrderInfo=(OrderInfo)queryOrderList_pageBean.getList().get(i);  
                    getOut(out,newOrderInfo,sep);  
                }  
            }  
            if(totalPage>1){  
                for (int m = 2; m <= totalPage; m++) {  
                    queryOrderList_pageBean = statisticsService.queryOrderListByCompanyConditions(order,   
                            queryOrderList_currentPage, queryOrderList_pageSize);  
                    List list =queryOrderList_pageBean.getList();  
                    if(list!=null && list.size()>0){  
                        for (int j = 0; j < list.size(); j++){  
                            OrderInfo nOrderInfo=(OrderInfo)list.get(j);  
                            getOut(out, nOrderInfo, sep);  
                        }   
                    }  
                }  
            }  
            out.flush();   
            out.close();  
        } catch (Exception e) {  
            e.printStackTrace();  
        }  
        return null;  
    }  
      
    public void getOut(OutputStream out,OrderInfo newOrderInfo,String sep) throws IOException{  
        if(!StringUtil.isNull(newOrderInfo.getOrderCard())){  
            out.write(String.valueOf(newOrderInfo.getOrderCard()).getBytes());   
        }else{  
            out.write(String.valueOf("订单编号为空").getBytes());   
        }  
        out.write((sep).getBytes());  
        if(!StringUtil.isNull(newOrderInfo.getMemberContactsPhone())){  
            out.write(newOrderInfo.getMemberContactsPhone().getBytes());   
        }else{  
            out.write(String.valueOf("用户联系电话为空").getBytes());  
        }  
        out.write((sep).getBytes());   
        if(newOrderInfo.getAddressDesc()!=null){  
            out.write(newOrderInfo.getAddressDesc().getBytes());  
        }else{  
            out.write(String.valueOf("联系地址为空").getBytes());  
        }  
        out.write((sep).getBytes());   
        if(newOrderInfo.getGenerateTime()!=null){  
            out.write(new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(newOrderInfo.getGenerateTime()).getBytes());  
        }else{  
            out.write(String.valueOf("下单时间为空").getBytes());  
        }  
        out.write(System.getProperty("line.separator").getBytes());  
    }