Apache HttpClient Example

Apache Http Client Example

• Apache Http Client Example
• https://hc.apache.org/
• Sample Code : https://hc.apache.org/httpcomponents-client-ga/examples.html
• Spring RestTemplate 보다 설정이나 사용이 까다롭다. 설정이 많이 필요한 경우를 제외하고는 Spring RestTemplate를 활용하자.

Sample Code

public class ClientWithResponseHandler {

    public final static void main(String[] args) throws Exception {

        CloseableHttpClient httpclient = HttpClients.createDefault();

        try {

            HttpGet httpget = new HttpGet("http://httpbin.org/");

            System.out.println("Executing request " + httpget.getRequestLine());

            // Create a custom response handler

            ResponseHandler<String> responseHandler = new ResponseHandler<String>() {

                @Override

                public String handleResponse(

                        final HttpResponse response) throws ClientProtocolException, IOException {

                    int status = response.getStatusLine().getStatusCode();

                    if (status >= 200 && status < 300) {

                        HttpEntity entity = response.getEntity();

                        return entity != null ? EntityUtils.toString(entity) : null;

                    } else {

                        throw new ClientProtocolException("Unexpected response status: " + status);

                    }

                }

            };

            String responseBody = httpclient.execute(httpget, responseHandler);

            System.out.println("----------------------------------------");

            System.out.println(responseBody);

        } finally {

            httpclient.close();

        }

    }

}

• ResponseHandler로 이용하여 response body를 얻을수가 있다.