向前端发json字符串

@RequestMapping(value="/queryAllStudent") public void query(HttpServletResponse resp) { try { /*list集合中存放的是好多student对象*/ List<Student> students = userService.getAllStudentInfo(); /*将list集合装换成json对象*/ JSONArray data = JSONArray.fromObject(students); //接下来发送数据 /*设置编码，防止出现乱码问题*/ resp.setCharacterEncoding("utf-8"); /*得到输出流*/ PrintWriter respWritter = resp.getWriter(); /*将JSON格式的对象toString()后发送*/ respWritter.append(data.toString()); } catch (Exception e) { e.printStackTrace(); } } ```