@RequestMapping("about") public void About(Model model, String id) { List<Article> aboutList = aboutService.getAboutList(); model.addAttribute("aboutlist", aboutList); if (StringUtil.isNullOrEmpty(id) && aboutList.size() > 0) { id = String.valueOf(aboutList.get(0).getId()); } model.addAttribute("classid", id); List<Article> aboutOneContent = aboutService.getAboutOneContent(id); model.addAttribute("aboutonecontent", aboutOneContent); }