Send Map to servlet with Ajax JSON

Question

I'm building a Tomcat project, but I need to send a JavaScript Map to the Servlet.

I tried to do this with JSON and Ajax. With a simple array I don't have any problems. But when I send a map on the server side it only prints "[Ljava.lang.String@" and the reference. But not the contents.

This is my code: My map name is ticket, and this is its structure:

ticket[id] = { nombre: nombre, precio:price,cantidad: 1 };

On the client side I call this function to send this Map via Ajax.

First I transform the map to a JSON:

var datos=JSON.stringify(ticket);

And I send the request like this:

$.ajax({
         url:"VentaProductos",
         type:"POST",
         dataType:'json',
         data: {datos},
         success:function(data){
         alert("OK")
            },
        });

And this is the server side. This is inside the method doPost():

String[] myJsonData = request.getParameterValues("datos");
System.out.println("Servlet"+request.getParameterValues("datos").toString());
if(myJsonData!=null) {
    System.out.println("It works");
};

System.out.println only prints "Servlet [Ljava.lang.String;@320aaecf" only a reference. How can I solve it to receive the contents of this Map? Thanks

Answer 1

I finally changed the Map for a multidimensional array and it works with this:

Client side:

$.ajax({
        url:"VentaProductos",
        type:"POST",
        dataType:'json',
        success:function(data){
            // codes....
        },
        data: {json: JSON.stringify(multidimensionalarray)}
    });

And server side:

String[] data = request.getParameterValues("json");

I hope that it could help somebody in the future :)