/**
  * 修改页面提交表单 action="system/choicenesscontent/save"
  *
  * @param yc
  * @param m
  * @return
  * @throws IOException
  */
 @RequestMapping("/save")
 public String save(YztChoicenesscontent yc, ModelMap m, HttpServletRequest request) {
   Json json = new Json();
   int flag = 0;
   // 修改之前先判断是否
   String introduction = yc.getIntroduction();
   if (CommonUtil.notEmpty(yc.getId())) {
     // 不为空的时候是修改
     yc.setModfiytime(new Date());
     // 写入流
     try {
       saveHtmlUrl(request, yc);
     } catch (IOException e) {
       e.printStackTrace();
     }
     flag = choicenesscontentService.updateNotNull(yc);
   } else {
     // 为空的时候添加
     try {
       saveHtmlUrl(request, yc);
     } catch (IOException e) {
       e.printStackTrace();
     }
     yc.setId(GUIDGener.getGUID());
     yc.setCreatetime(new Date());
     yc.setPicCount(0);
     yc.setViewCount(1);
     flag = choicenesscontentService.save(yc);
   }
   return "redirect:view/" + yc.getId();
 }