在JSF 2.0应用程序中，如何从ManagedBean将大量数据输入到我的javascript代码中？

Question

I have a JSF 2.0 app where I need to get from the server side ManagedBean a huge amount of data to load into a multidimensional array of about 7000 javascript objects for graphic display. Ultimately these objects will be edited by the app and returned to the server for storage back in the db they came from, so transport in both directions would be needed.

The usual ways to get and set data via hidden h:inputText items wont handle this sort of volume. I also tried to do an ajax call from my client side code but I cant figure out what url to use to get to my session's ManagedBean. It seems like this should be possible somehow ...

Answer 1

you can use servlets for retrieving and processing data with jquery ajax

Servlet class :

    @WebServlet("/jsonservlet/*")
    public class JSONServlet extends HttpServlet {




        protected void doGet(HttpServletRequest request, HttpServletResponse response)
                throws ServletException, IOException{

           //use any json library ( I recommended gson library)

            response.setContentType("application/json");            

           response.getWriter().write(jsonData)
        }
    } 

now you can make ajax call to this servlet using jquery to retrieve the json returned data

$.ajax({
        url: "jsonservlet",
        type: 'GET',
        dataType: 'json',

        contentType: 'application/json',
        mimeType: 'application/json',

        success: function (data) {
            //here you can populate your javascript array 
        },
        error:function(data,status,er) {
            alert("error: "+data+" status: "+status+" er:"+er);
        }
    });