ajax動態查詢數據庫數據并顯示在前臺的方法

2024-09-01 08:31:12

字體：大中小

來源：轉載

供稿：網友

今天做了一個ajax動態查詢數據庫的小Demo，又重新學習了一下ajax的一些知識。在此和大家分享一下......

啥都別說了，先上代碼

Controller層

查詢總用戶數

 @RequestMapping(value = "/findTotalUsers.do",method = RequestMethod.GET) public @ResponseBody Long findTotalUsers(){  ModelAndView modelAndView = new ModelAndView();  Long sum = personService.findTotalUsers();  System.out.println(sum+"....................................");  modelAndView.addObject("sum",sum);  return sum; }

Service層

public Long findTotalUsers() {  return personDao.findTotalUsers(); }

Dao層

public Long findTotalUsers() {  String hql = "select count(*) from Person";  return (Long) this.getSessionFactory().getCurrentSession().createQuery(hql).uniqueResult(); }

ajax代碼

<script src="../js/jquery-1.8.3.min.js" type="text/javascript"></script> <script type="text/javascript">  $(document).ready(    function ajaxRePost(url,params){     var message = "";     var options={      type:"GET",      url:"${pageContext.request.contextPath}/person/findTotalUsers.do",      data:{},      async:false,      success:function (msg) {       message=msg;      }     };     $.ajax(options);     alert(message);//     debugger;     $("#count").text(message);     return message;    }  )  </script>