如何从jsp访问javascript中的json数据

I know this question has been asked before but i am unable to get the solution this is the file from where I am sending json data

我知道之前有人问过这个问题，但我无法得到解决方案这是我发送json数据的文件

<% 


//JSONArray arrayObj = new JSONArray();
//JSONArray data = new JSONArray();

int count = 0;
 JSONObject result = new JSONObject();



try{


        Connection conn = null;
        Class.forName("com.mysql.jdbc.Driver").newInstance();
        conn = DriverManager.getConnection(
                "jdbc:mysql://localhost/schoolproject","root", "");
                Statement stmt = conn.createStatement();


PreparedStatement ps=conn.prepareStatement("select * from staff_attendance where id=?");
ps.setInt(1,Integer.valueOf(request.getParameter("id")));


      ResultSet rs = ps.executeQuery();


      while(rs.next())
      {
      count++;
      JSONArray ja = new JSONArray();
      Map<String,Integer> map=new HashMap<String,Integer>();  
       //ja.put("<input type='checkbox' name='selected' value="+rs.getInt("id")+">");
       result.put("id",rs.getInt("id"));
       //map.put("id",rs.getInt("id"));

      result.put("staff_id",rs.getInt("staff_id"));
       //map.put("staff_id",rs.getInt("staff_id"));

      result.put("date_t",rs.getDate("date_t"));
       result.put("status",rs.getInt("status"));
       //map.put("status",rs.getInt("status"));
       result.put("comments",rs.getString("comments"));
       result.put("image",rs.getInt("image"));
       //ja.put("<button type='button' id='"+rs.getInt("id")+ "'class='btn mine btn-danger btn-sm' onclick='ajaxcall(this.id)'><span class='glyphicon glyphicon-pencil'></span> Edit </button>");
       //ja.put(map);
       //data.put(ja);
       //break;
      //out.println(arrayObj);
      //out.println(",");



}
      }
      catch(Exception e){
        out.println(e);

        }


//result.put("aaData", data);


   //out.println(result);    
   out.println(result.toString());
 out.flush();


        %>

On this file I amm trying to access data like this

在这个文件上，我试图访问这样的数据

function ajaxcall(id){
    $.ajax({
   type:"post",
   url:"edit.jsp",
   data:{id:id},
   success:function(e){
       //var obj = JSON.parse(e)
       //$("#myid").val(obj[0].id);
   //alert(e);
   alert(e);
   console.log(e[id]);
   console.log(e.id);

       }

        });
   //alert(id);

}

I have tried setting dataType:json too but then nothing is working,I am getting undefined everytime This is the data which I am getting through the server response,form my jspfile

我也尝试过设置dataType:json，但是什么都没有工作，每次这是我通过服务器响应获得的数据，形成jspfile时，我都没有定义

{"image":7,"date_t":2018-06-14,"comments":"NA","staff_id":1,"id":100,"status":1}

1 个解决方案

#1

Output your data like

输出数据等

JSONArray jp = new JSONArray();
jp.put(result);
out.println(jp);
 out.flush();

And then in javascript

然后在javascript

function ajaxcall(id){
    $.ajax({
   type:"post",
   url:"edit.jsp",
   dataType: 'json',
   data:{id:id},
   success:function(e){
       //var obj = JSON.parse(e)
       //$("#myid").val(obj[0].id);
   //alert(e);
   alert(e[0]);
   console.log(e[0].id);

       }

        });
   //alert(id);

}

Use dataType:json it will automatically parse data ,I hope it will work.

使用数据类型:json会自动解析数据，我希望它能起作用。

#1