導出Excel功能分sheet頁處理數據：

/*導出EXCEL*/
public void createExcel() {
    log.info("導出Excel功能已經啟動-BEGIN");
    JxlUtil jsl = new JxlUtil();
    List<Device> dataList =new ArrayList<Device>();
    List<DeviceExport> list = new ArrayList<DeviceExport>();
    // 構建路徑
    String downLoadPath = "
 
/WEB-INF/download/asset/";
    String rootPath = getServletContext().getRealPath(downLoadPath);

    String fileName = "";
    File file=new File(rootPath);    

    try {
        if(!(file.exists()||file.isDirectory())){
            file.mkdirs();
        }
        
        if (null != getRequest().getParameter("
 
ids")) {
            String ids[] = getRequest().getParameter("ids").split(",");
            for (int i = 0; i < ids.length; i++) {
                if(null!=ids[i]){
                    device = deviceService.queryById(ids[i].trim());
                    dataList.add(device);
                }
            }
          }
 
else{
              dataList = deviceService.queryForExcel();
          }
        
        if(dataList!=null){
            for (Device device : dataList) {
                DeviceExport deviceExport= new DeviceExport();
                if(null!=device.getId()){
                    deviceExport.setId(device.getId());
                     }
                if(null!=device.getIp()){
                    deviceExport.setIp(device.getIp());
                }
                if(null!=device.getMac()){
                    deviceExport.setMac(device.getMac());
                }
                if(null!=device.getName()){
                    deviceExport.setName(device.getName());
                }
                if(null!=device.getOrganization()){
                    Organization organization=device.getOrganization();
                    String Aname =organization.getName();
                    String name= getAname(organization, Aname);
                    deviceExport.setOrganizationName(name);            
                }
                if(null!=device.getRegState()){
                        deviceExport.setRegState(device.getRegState());
                }
                if(null!=device.getUser()){
                    deviceExport.setUserName(device.getUser().getName());
                }
                if(null!=device.getProtectState()){
                    deviceExport.setProtectState(device.getProtectState());
                }
                if(null!=device.getIsOpened()){
                    deviceExport.setIsOpened(device.getIsOpened());
                }
                String osName = MessageUtils.getMessage(device.getOs().getName());
                deviceExport.setOsName(osName);
                String deviceType = MessageUtils.getMessage(device.getDeviceType().getName());
                deviceExport.setDeviceTypeName(deviceType);
                list.add(deviceExport);
            }
        }
        
        String interBase = "sys.column.name.device";
        //String inter_value_key = "#isOpened#roamState#protectState#";
        String inter_value_key = "#isOpened#protectState#regState#";
        String[] inter_value_ary = { "isOpened.0", "isOpened.1", "protectState.0", "protectState.1","regState.0","regState.1"};
        //導出不顯示漫遊狀態
        //String[] inter_value_ary = { "isOpened.0", "isOpened.1","roamState.0", "roamState.1","protectState.0", "protectState.1"};

        fileName = jsl.getInter(interBase.replace("column", "table"))
                + new Date().getTime();
        String targetfile = rootPath + System.getProperty("file.separator")
                + fileName + ".xls";
        
        //分sheet頁處理
        int total = dataList.size();//總數
        int max = 5000;//每sheet頁允許最大數
        int avg = total / max;//sheet頁個數
        
        // 創建可寫入的Excel工作薄
        WritableWorkbook wwb;
        wwb = Workbook.createWorkbook(new File(targetfile));
    
        for(int i=0;i<avg+1;i++){
            // 創建Excel工作表
            WritableSheet ws = wwb.createSheet("已註冊設備"+(i+1), i);
            int num = i * max;
            int index = 0;
            List<DeviceExport> exportList = new ArrayList<DeviceExport>();
            for(int m = num; m < total; m++){//m即為每個sheet頁應該開始的數
                if(index == max){//判斷 index = max 的時候跳出裏層的for循環
                    break;
                }
                DeviceExport deviceExport=list.get(m);
                exportList.add(deviceExport);//從總的list數據裏面取出該處於哪個sheet頁的數據，然後加進exportList，exportList即為當前sheet頁應該有的數據
                index++;
            }
            // 獲取需要內容國際化的字段
            jsl.creatDeviceExcel(ws, exportList, interBase, inter_value_key,inter_value_ary);
        }
        
        // 寫入Exel工作表
        wwb.write();
        // 關閉Excel工作薄對象
        wwb.close();
        
        getResponse().setContentType(getServletContext().getMimeType(fileName));
        getResponse().setHeader("Content-Disposition", "attachment;fileName="+new String(fileName.getBytes("gb2312"), "ISO8859-1")+".xls"); 
        String fullFileName = getServletContext().getRealPath(downLoadPath + fileName+ ".xls");  
        InputStream in = new FileInputStream(fullFileName);  
        OutputStream out = getResponse().getOutputStream();
        int b;  
        while((b=in.read())!= -1){  
            out.write(b);  
        }  
        in.close();  
        out.close();  
        /*ServletActionContext.getRequest().setAttribute("downLoadPath",
                downLoadPath);
        ServletActionContext.getRequest().setAttribute("fileName",
                fileName + ".xls");*/
        this.msg = RESULT_SUCCESS;
        log.info("導出EXCEL提示信息為:"+this.msg);
    } catch (Exception e) {
        log.error("導出EXCEL失敗:" + e.getMessage());
    }
    log.info("導出Excel功能已經啟動-END");
    /*return "downLoadUI";*/
}

項目筆記：導出Excel功能分sheet頁插入數據