public  String sendMonitor(String url, String param) {
		PrintWriter out = null;
		BufferedReader in = null;
		String result = "";
		try {
			URL realUrl = new URL(url);
			// 開啟和URL之間的連線
			HttpURLConnection conn = (HttpURLConnection) realUrl.openConnection();
			// 設定通用的請求屬性
			conn.setRequestProperty("accept", "*/*");
			conn.setRequestProperty("Content-Type","application/json");  //設定 請求格式 json，也可以設定xml格式的 
			conn.setRequestProperty("Accept","application/json");//設定響應的資訊的格式為 json，也可以設定xml格式的 
			conn.setRequestProperty("connection", "Keep-Alive");
			conn.setRequestProperty("user-agent",
					"Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1;SV1)");
			// 傳送POST請求必須設定如下兩行
			conn.setDoOutput(true);
			conn.setDoInput(true);
			// 獲取URLConnection物件對應的輸出流
			out = new PrintWriter(conn.getOutputStream());
			// 傳送請求引數
			out.print(param);
			// flush輸出流的緩衝
			out.flush();
			// 定義BufferedReader輸入流來讀取URL的響應
			if (conn.getResponseCode() == 200) {
				in = new BufferedReader(
						new InputStreamReader(conn.getInputStream()));
			} else {
				in = new BufferedReader(
						new InputStreamReader(conn.getErrorStream()));
			}
			String line;
			while ((line = in.readLine()) != null) {
				result += line;
			}
		} catch (Exception e) {
			System.out.println("傳送 POST 請求出現異常！"+e);
			e.printStackTrace();
		}
		//使用finally塊來關閉輸出流、輸入流
		finally{
			try{
				if(out!=null){
					out.close();
				}
				if(in!=null){
					in.close();
				}
			}
			catch(IOException ex){
				ex.printStackTrace();
			}
		}
		return result;
	}