@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
throws ServletException, IOException {
String jsonData = getDataAsJson(req.getParameter("symbol"));
String output = req.getParameter("callback") + "(" + jsonData + ");";
resp.setContentType("text/javascript");
PrintWriter out = resp.getWriter();
out.println(output);
// prints: jsonp1232617941775({"symbol" : "yeyaomai", "price" : "91.42"});
}
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