//后臺
Gson gson=new Gson();
String json=gson.toJson(集合, new TypeToken<List<集合裝的類型>>(){}.getType());
//寫入數(shù)據(jù)到前臺
resp.setCharacterEncoding("UTF-8");
PrintWriter pw=resp.getWriter();
pw.write(json);
//后臺
Gson gson=new Gson();
String json=gson.toJson(集合, new TypeToken<List<集合裝的類型>>(){}.getType());
//寫入數(shù)據(jù)到前臺
resp.setCharacterEncoding("UTF-8");
PrintWriter pw=resp.getWriter();
pw.write(json);