java - Fetching a JSON via JSP to JS -

i'm having trouble getting json string servlet, throu jsp page javascript , imported vakata/jstree.

this how current code looks like.

servlet:

protected void doget(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {     system.out.println("du är nu doget marketdataservlet");      treebranchstringbuilder tbsb = new treebranchstringbuilder();            request.setattribute("marketgrouplistjsonstring", tbsb.gettreebranchstring(mm.getallmarketgroups(), im.getallitems()));     request.getrequestdispatcher("/marketdata.jsp").forward(request, response); } 

jsp/html:

<div id="market_tree_branches"> </div>  <div id="hidden"><%= request.getattribute("marketgrouplistjsonstring") %></div> 

javascript:

var marketnitemsstring = $("#hidden").text(); console.log(marketnitemsstring) $('#market_tree_branches').jstree({     'core' : {         'data' : marketnitemsstring     } }); 

string that's generated jsp looks like:

[{"id":2,"text":"blueprints","parent":"#"},{"id":204,"text":"ships","parent":"2"},{"id":209,"text":"ship equipment","parent":"2"},{"id":211,"text":"ammunition \u0026 charges","parent":"2"},{"id":357,"text":"drones","parent":"2"},{"id":943,"text":"ship modifications","parent":"2"},{"id":1041,"text":"manufacture \u0026 research","parent":"2"},{"id":1338,"text":"structures","parent":"2"},{"id":9,"text":"ship equipment","parent":"#"},{"id":10,"text":"turrets \u0026 bays","parent":"9"}] 

this error i'm getting in chrome console log:

uncaught error: syntax error, unrecognized expression:  [{"id":2,"text":"blueprints","parent":"#"},{"id":204,"text":"ships","parent":"2"},{"id":209,"text":"ship equipment","parent":"2"},{"id":211,"text":"ammunition \u0026 charges","parent":"2"}, ........ 

i'm guessing during process of sending jsp/html javascript variable goes wrong cant figure out what, since jstree cant read variable. if copy/paste entire string html 'data': works fine.

your best bet use ajax call javasscript code directly servlet. there's absolutely no reason have jsp in middle there. can this:

protected void doget(httpservletrequest request, httpservletresponse response) throws servletexception, ioexception {     system.out.println("du är nu doget marketdataservlet");      treebranchstringbuilder tbsb = new treebranchstringbuilder();            string json = bsb.gettreebranchstring(mm.getallmarketgroups(), im.getallitems());     response.setcontenttype("application/json");     response.getwriter().println(json); } 

for javascript side, depends entirely on javascript framework want use. jquery easiest starting point this.