java - How to get data through JSON in a particular format -

following code snippet used online roster gtalk

                     if (status == true) {          roster roster =connection.getroster();           collection<rosterentry> entries =roster.getentries();           system.out.println(roster.getentrycount());           int count1 = 0;           int count2 = 0;           for(rosterentry r:entries)           {            presence presence = roster.getpresence(r.getuser());           if(presence.gettype() == presence.type.unavailable)           {          // system.out.println(user + "is offline");           count1++;            }            else           {                string rosternamesjson = new gson().tojson(r.getname());                string rosteruserjson =new gson().tojson(r.getuser());               response.setcontenttype("application/json");               response.setcharacterencoding("utf-8");               //array of 2 elements              string  rosterinfojson=response.getwriter().write("rosternamesjson"+"rosteruserjson"]);               response.sendredirect("roster.jsp");               //system.out.println(name+user + "is online");                count2++;     }           } } 

now in jsp page want populate roster name , jid i.e xoxoxo:xoxoxo@gmail.com jjj:jjj@gmail.com , on. how achieve this?

should construct json element i.e

users  {    name:    jid:   } 

and write function in jsp page access data?

the function have is

     $(function() {         $.getjson('xxxservlet', function(rosterinfojson) {             var $ul = $('<ul>').appendto($('#roster'));             $.each(rosterinfojson, function(index, rosterentry) {                 $('<li>').text(rosterentry.user).appendto($ul);             });         });     }); 

yes. should construct json

 users   {    name:    jid:   } 

you may want define java class mapping json.

public class myuser{   public string name;   public string jid;   public myuser(string name, string jid){     this.name=name;     this.jid=jid;   } } 

and then, append online uses list or something

arraylist<myuser> mul = new arraylist<myuser>(); if (status == true) {  ...  ...  for(rosterentry r:entries) {    if(...){          ...    }    else   {      mul.add(new myuser(r.getname(),r.getuser());     count2++;    }  }  response.setcontenttype("application/json"); response.getwriter().write(new gson().tojson(mul)); response.setcharacterencoding("utf-8"); response.sendredirect("roster.jsp"); 

in javascript

... $('<li>').text(rosterentry.name +":"+rosterentry.jid).appendto($ul); ...