// 前台展示内容
  public String showContent() throws Exception {

    entity = dao.get(entity.getId());

    // 判断,若为null,则为第一次点击
    if (entity.getClicknumber() == null) {
      entity.setClicknumber(0);
    }

    // 阅读量+1
    entity.setClicknumber(entity.getClicknumber() + 1);

    // 更新阅读量
    dao.update(entity);

    return "news-show";
  }
 // 后台查询新闻
 public String searchNews() throws Exception {
   xwlist = dao.searchByTD(entity.getTitle(), entity.getPubdate());
   return "news-admin";
 }
 // 后台删除新闻
 public String deleteNews() throws Exception {
   dao.delete(entity.getId());
   return "save-admin";
 }
 // 后台修改新闻
 public String getNews() throws Exception {
   entity = dao.get(entity.getId());
   return "news-admin-input";
 }