A brief discussion on the problem of obtaining ModelAndView value in js

Below I will share with you a brief discussion on the problem of obtaining the ModelAndView value with js. It has a good reference value and I hope it will be helpful to everyone.

Can't the return value of ModelAndView be received in JS? Does it have to be received in a JSP page?

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;
  }

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

<script type="text/javascript">
    var path = &#39;<%=basePath%>&#39;;
    var author=${userId};
    $(document).ready(function(){
      queryList();
    });
    function queryList(){
      $.ajax({
        type : &#39;POST&#39;,
        url : path+&#39;queryDiaryList&#39;, //通过url传递name参数
        data : {
            author:author,
            page:_currentPage,
            pageSize:_pageSize,
            type:$("#queryType").val()
          },
        dataType : &#39;json&#39;,
        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

【efficient? 】

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, just

var result = JSON.parse(responseText);

3 Method three [valid]

Add hidden fields,

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

Easy for js to read

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

The above is what I compiled for everyone, I hope it will be helpful to everyone in the future.

Related articles:

Ajax core XMLHttpRequest summary

Solving the problem of ajax cross-domain request data cookie loss

Use ajax to change page content and address bar URL without refreshing

##

The above is the detailed content of A brief discussion on the problem of obtaining ModelAndView value in js. For more information, please follow other related articles on the PHP Chinese website!