HttpURLConnection GETは、具体的な情報がない場合に判定に成功する

今日HttpURLConnectionでgetリクエストを書いたとき、いつも間違っていることに気づき、後で問題を発見し、後で忘れないようにメモしました.

/**
	 *          
	 * 
	 * @param response
	 * @param json
	 */
	public static String transferForGet(String data,String serverUrl) {
		//     
		URL url;
		try {
			url = new URL(serverUrl);
		} catch (MalformedURLException e1) {
			Util.err(e1);
			return "fail";
		}
		//          
		HttpURLConnection connection = null;
		String strResponse = "";
		BufferedReader reader = null;
		try {
			connection = (HttpURLConnection) url.openConnection();
			connection.connect();
			
			connection.getInputStream();
			strResponse = connection.getResponseCode()+":"+connection.getResponseMessage();
		} catch (ProtocolException e) {
			Util.err(e);
		} catch (IOException e) {
			Util.err(e);
		} finally{
			try{
				if(reader != null){
					reader.close();
				}
			}catch(Exception e){}
			try{
				connection.disconnect();
			}catch(Exception e){
				Util.err(e);
			}
		}
		if(strResponse == null || strResponse.equals(""))
			return "fail";
		return strResponse;
	}

返信中にメッセージがない場合、connection.getResponseCode()が200で成功したかどうかを判断する
POSTメソッドの使用:

/**
	 *          
	 * 
	 * @param response
	 * @param json
	 */
	public static String transfer(String data,String serverUrl) {
		//     
		URL url;
		try {
			url = new URL(serverUrl);
		} catch (MalformedURLException e1) {
			// TODO Auto-generated catch block
			Util.err(e1);
			return "fail";
		}
		//          
		HttpURLConnection connection = null;
		String strResponse = "";
		BufferedReader reader = null;
		try {
			connection = (HttpURLConnection) url.openConnection();
			connection.setConnectTimeout(50 * 1000);// 10 
			connection.setReadTimeout(50 * 1000);// 10 
			connection.setDoOutput(true);
			connection.setRequestMethod("POST");
			connection.setRequestProperty("Content-Type",
					"text/html; charset=utf-8");
			connection.setRequestProperty("Connection", "close");
			//   
			OutputStreamWriter output = new OutputStreamWriter(connection
					.getOutputStream(),"UTF-8");
			output.write(data);
			output.flush();
			output.close();

			//         
			String strLine = "";
			InputStream in = connection.getInputStream();

			reader = new BufferedReader(
					new InputStreamReader(in,"UTF-8"));

			while ((strLine = reader.readLine()) != null) {
				strResponse += strLine ;
			}
		} catch (ProtocolException e) {
			Util.err(e);
		} catch (IOException e) {
			Util.err(e);
		} finally{
			try{
				if(reader != null){
					reader.close();
				}
			}catch(Exception e){}
			try{
				connection.disconnect();
			}catch(Exception e){
				Util.err(e);
			}
		}
		if(strResponse == null || strResponse.equals(""))
			return "fail";
		return strResponse;
	}