how to return data to ajax from java Servlet

Question

i have my ajax function as follows:

$.ajax({
  type: 'GET',
  url: "/myservlet",
  data: {
  objects: '2',
  dimension: '2',
  },
  success: function( data ) {
  console.log(data);
  alert(data);
  },
  error:function(data,status,er) {
    alert("error: "+data+" status: "+status+" er:"+er);
   }
 });

and i have my servlet to process the data sent to /myservlet. I read from the ajax tutorial which said the data in the success function is the data that ajax got from the server side. But i don't know how to set this data or return this data from doGet method in a Java servlet to the frontend. It seems doGet is a void method and cannot return any values, isn't it? I am a freshman in web development, thanks in advance!

Solution

You can get the data from servlet by writing on response.getWriter().write("");.

Here is a simple servlet example.

@WebServlet(name = "MyServlet", urlPatterns = {"/myservlet"})
public class MyServlet extends HttpServlet {
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {

        response.setContentType("text/html;charset=UTF-8");
        response.getWriter().write("Success Data");
    }   
}