js gets ModelAndView value

This time I will bring you js to get the ModelAndView value. What are the precautions for js to get the ModelAndView value? The following is a practical case, let's take a look.

1 Method 1 [Valid]

Yes, it is the same as the el expression access method.

Sample code, a userId is stored in the Action of a data display request:

 @RequestMapping(value="/diary")
  public ModelAndView toDiaryList(HttpSession session){
    ModelAndView view = new ModelAndView("/diary_list");
    TbUser user = (TbUser)session.getAttribute(SystemConstant.CURRENT_USER);
    //set info of current user
    if(user!=null){
      Integer id = user.getId();
      view.addObject("userId",id);
    }
    return view;
  }

Use this userId as a query condition in the js in the page jsp file:

<script type="text/javascript">
    var path = '<%=basePath%>';
    var author=${userId};
    $(document).ready(function(){
      queryList();
    });
    function queryList(){
      $.ajax({
        type : 'POST',
        url : path+'queryDiaryList', //通过url传递name参数
        data : {
            author:author,
            page:_currentPage,
            pageSize:_pageSize,
            type:$("#queryType").val()
          },
        dataType : 'json',
        success:function(data){
          if(data.status){
            showTable(data.result);
            //调用分页插件，初始化分页p
            pageShow("queryList",data.ext.total);
          }else{
            alert(data.description);
          }
        },
        error:function(e){
          alert("Net error ,try later.");
        }
      });
    }
    </script>

2 Method 2

【Effective? 】

Is the platform returning js or json? This must be clarified!

Assume that the string returned by the background is stored in responseText, then

If it is js, then

var result = eval("(" + responseText + ")");

If it is json, then

var result = JSON.parse(responseText);

3 Method Three [Effective]

Add hidden fields,

<input id="autoflag" type="hidden" value="${autoflag}">

Easy for js to read

var passflag=document.getElementById("autoflag");

I believe you will read the case in this article You have mastered the method. For more exciting information, please pay attention to other related articles on the php Chinese website!

Recommended reading:

Detailed explanation of Vue two-way data binding examples

Vue application reference vector diagram

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