Http client

ApacheHttp.java

		DefaultHttpClient client = new DefaultHttpClient();
		// HttpClient를 매번생성하지 않고 ThreadSafeClientConnManager 를 활용하는 것이 바람직
		
		HttpPost request = new HttpPost(apiUrl);
		
		UrlEncodedFormEntity formEntity = createEntity(userId, password);
		request.setEntity(formEntity);
		
		InputStream contentStream = null;
		String resContent = null;
		try {
			HttpResponse response = client.execute(request);
			HttpEntity resEntity = response.getEntity();
			contentStream = resEntity.getContent();
			resContent = IoUtils.readFully(contentStream);
		} catch (IOException e) {
			throw new IllegalStateException("fail to connect api server :" + apiUrl ,e);
		} finally {
			IoUtils.close(contentStream);
		}