The backend javaweb implementation returns a jsonArray containing order information

Add code in the servlet layer:

                                String name = req.getParameter("username");
ArrayList<Order> List = new OrderDAO().findOrder(name);
JsonArray jsonArray=new JsonArray();
String str="";
resp.setContentType("application/json;charset=utf-8");
req.setCharacterEncoding("UTF-8");
resp.setCharacterEncoding("UTF-8");
PrintWriter out = resp.getWriter();
for(int i=0;i<List.size();i++){
JsonObject jsonOb=new JsonObject();
jsonOb.addProperty("food", List.get(i).getFood());
jsonOb.addProperty("seller", List.get(i).getSeller());
jsonOb.addProperty("price", List.get(i).getPrice());
jsonOb.addProperty("stage", List.get(i).getStage());
jsonOb.addProperty("time", List.get(i).getTime().toLocaleString());
jsonArray.add(jsonOb);
}

out.printf(jsonArray.toString());

After the implementation, the browser opens the backend url to get the result:

[

{

" food ":  "hamburger,CokeCola,hamburger,CokeCola,hamburger,CokeCola" ,

" seller ":  "canteenA" ,

" price ":  10 ,

" stage ":  "finished" ,

" time ":  "2018-5-4 18:10:32"

} ,

{

" food ":  "CokeCola" ,

" seller ":  "canteenB" ,

" price ":  3 ,

" stage ":  "dispatch" ,

" time ":  "2018-5-1 17:00:58"

}

]

[

{

" food ":  "hamburger,CokeCola,hamburger,CokeCola,hamburger,CokeCola" ,

" seller ":  "canteenA" ,

" price ":  10 ,

" stage ":  "finished" ,

" time ":  "2018-5-4 18:10:32"

} ,

{

" food ":  "CokeCola" ,

" seller ":  "canteenB" ,

" price ":  3 ,

" stage ":  "dispatch" ,

" time ":  "2018-5-1 17:00:58"

}

]