每日学习

今天补说一下后端对okhttp获取数据时的处理：

	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		// TODO Auto-generated method stub
		request.setCharacterEncoding("utf-8");
		response.setCharacterEncoding("utf-8");
		String classify=request.getParameter("classify");
			Dao dao=new Dao();
			List<News> list=new ArrayList();
			list=dao.selectdata(classify);
			String json="{}";
   	 		ObjectMapper om=new ObjectMapper(); //需要导包jackson
   	 		json=om.writeValueAsString(list);
   	 		PrintWriter out=response.getWriter();
   	 		System.out.println(json.toString());
   	 		out.println(json);
   	 		out.flush();
   	 		out.close();
	}

 和寻常的web前端页面获取数据没有天大区别，

这里也可以看到其中返回app的数据，和之前写的博客中对数据的处理相对应