jstree读取到后台数据json字符串后，怎么显示到前台？

Question

$("#tree").jstree(
            {
                "json_data":{
                    "ajax": {
                            url : "/rest/columnjson/createTreeJson",
                            data : function (n) {
                                alert(n);
                                return {
                                    "operation": "get_children",
                                    "id": n.attr ? n.attr("id").replace("node_", ""):1
                                };
                            }
                    }
                },
                "plugins": ["themes","json_data", "ui","crrm","contextmenu", "search"],
            })现在是能够读取到后台数据，并已拼接成json字符串，但是jsp页面无法显示后台数据，弹出的n值为-1，望哪位大神指点一下，谢谢。

Answer 1

获取是获取了 但是你并没有写把获取的内容加到htnl里的功能啊

Answer 2

这个我是在controller页面createTreeJson()方法中写了@RequestMapping("/createTreeJson")
    @ResponseBody
    public void createTreeJson(HttpServletRequest request, HttpServletResponse response)
            throws SecurityException, IOException{        request.setCharacterEncoding("utf-8");
        response.setContentType("text/html; charset=UTF-8");
        PrintWriter out = response.getWriter();
        StringBuilder json = basicColumnService.createTreeNode();
        json.deleteCharAt(json.length() - 1);        out.print("[" + json + "]");
        out.flush();
        out.close();
    }