public static void sendPostJson(String ADD_URL, JSONObject obj){		try {			URL url = new URL(ADD_URL);	        HttpURLConnection http = (HttpURLConnection) url.openConnection();	        http.setDoOutput(true);  	        http.setDoInput(true);  	        http.setRequestMethod("POST");  	        http.connect();  	        OutputStreamWriter out = new OutputStreamWriter(http.getOutputStream(), "UTF-8"); 	        	//        String input = "data=[{\"Nianji\":\"高中2015届\",\"Banji\":\"元培书院\",\"Xuehao\":\"1525998\",\"Xingming\":\"姓名\",\"JianhurenShouji\":\"11111111111\",\"QingjiaLeixing\":\"病假\",\"KaishiShijian\":\"2014-05-24T00:00:00\",\"KaishiJie\":\"第1节\",\"JieshuShijian\":\"2014-05-24T00:00:00\",\"JieshuJie\":\"第1节\",\"QingjiaYuanyin\":\"原因\",\"key\":\"\",\"pagesize\":5}]"; 	         	        out.append(obj.toString());  	        out.flush();  	        out.close();  	        BufferedReader reader = new BufferedReader(new InputStreamReader(http.getInputStream()));	        String line;	        StringBuffer buffer = new StringBuffer();	        while ((line = reader.readLine()) != null) {	            buffer.append(line);	        }	        reader.close();	        http.disconnect();	        System.out.println(buffer.toString());		} catch (Exception e) {            System.out.println(e);        }	}