Java CloseableHttpClient类代码示例

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
@Test
public void client() throws URISyntaxException, IOException {

    CloseableHttpClient httpclient = HttpClients.createDefault();

    URI uri = new URIBuilder()
            .setScheme("http")
            .setHost("www.google.com")
            .setPath("/search")
            .setParameter("q", "httpclient")
            .setParameter("btnG", "Google Search")
            .setParameter("aq", "f")
            .setParameter("oq", "")
            .build();
    HttpGet httpget = new HttpGet(uri);
    CloseableHttpResponse response = httpclient.execute(httpget);
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
/**
 * get a redirect for an url: this method shall be called if it is expected that a url
 * is redirected to another url. This method then discovers the redirect.
 * @param urlstring
 * @param useAuthentication
 * @return the redirect url for the given urlstring
 * @throws IOException if the url is not redirected
 */
public static String getRedirect(String urlstring) throws IOException {
    HttpGet get = new HttpGet(urlstring);
    get.setConfig(RequestConfig.custom().setRedirectsEnabled(false).build());
    get.setHeader("User-Agent", ClientIdentification.getAgent(ClientIdentification.yacyInternetCrawlerAgentName).userAgent);
    CloseableHttpClient httpClient = getClosableHttpClient();
    HttpResponse httpResponse = httpClient.execute(get);
    HttpEntity httpEntity = httpResponse.getEntity();
    if (httpEntity != null) {
        if (httpResponse.getStatusLine().getStatusCode() == 301) {
            for (Header header: httpResponse.getAllHeaders()) {
                if (header.getName().equalsIgnoreCase("location")) {
                    EntityUtils.consumeQuietly(httpEntity);
                    return header.getValue();
                }
            }
            EntityUtils.consumeQuietly(httpEntity);
            throw new IOException("redirect for  " + urlstring+ ": no location attribute found");
        } else {
            EntityUtils.consumeQuietly(httpEntity);
            throw new IOException("no redirect for  " + urlstring+ " fail: " + httpResponse.getStatusLine().getStatusCode() + ": " + httpResponse.getStatusLine().getReasonPhrase());
        }
    } else {
        throw new IOException("client connection to " + urlstring + " fail: no connection");
    }
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
public static String login(String randCode) {
    CloseableHttpClient httpClient = buildHttpClient();
    HttpPost httpPost = new HttpPost(UrlConfig.loginUrl);

    httpPost.addHeader(CookieManager.cookieHeader());
    String param = "username=" + encode(UserConfig.username) + "&password=" + encode(UserConfig.password) + "&appid=otn";
    httpPost.setEntity(new StringEntity(param, ContentType.create("application/x-www-form-urlencoded", Consts.UTF_8)));

    String result = StringUtils.EMPTY;
    try(CloseableHttpResponse response = httpClient.execute(httpPost)) {
        result = EntityUtils.toString(response.getEntity());
        CookieManager.touch(response);
        ResultManager.touch(result, new ResultKey("uamtk", "uamtk"));
    } catch (IOException e) {
        logger.error("login error", e);
    }

    return result;
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
public static String checkOrderInfo(TrainQuery query) {
    CloseableHttpClient httpClient = buildHttpClient();
    HttpPost httpPost = new HttpPost(UrlConfig.checkOrderInfo);

    httpPost.addHeader(CookieManager.cookieHeader());

    httpPost.setEntity(new StringEntity(genCheckOrderInfoParam(query), ContentType.create("application/x-www-form-urlencoded", Consts.UTF_8)));

    String result = StringUtils.EMPTY;
    try(CloseableHttpResponse response = httpClient.execute(httpPost)) {
        CookieManager.touch(response);
        result = EntityUtils.toString(response.getEntity());
    } catch (IOException e) {
        logger.error("checkUser error", e);
    }

    return result;
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
private static byte[] captchaImage(String url) {
    Objects.requireNonNull(url);

    CloseableHttpClient httpClient = buildHttpClient();
    HttpGet httpGet = new HttpGet(url);

    httpGet.addHeader(CookieManager.cookieHeader());

    byte[] result = new byte[0];
    try (CloseableHttpResponse response = httpClient.execute(httpGet)) {
        CookieManager.touch(response);
        result = EntityUtils.toByteArray(response.getEntity());
    } catch (IOException e) {
        logger.error("captchaImage error", e);
    }

    return result;
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
@Override
public List<User> load() {
	try (CloseableHttpClient httpClient = HttpClientBuilder.create().build();) {
		ArrayList<User> users = new ArrayList<>();
		String url = protocol+"://" + hostAndPort + "/openidm/managed/user?_prettyPrint=true&_queryId=query-all";
		HttpGet request = new HttpGet(url);
		configure(request);
		try (CloseableHttpResponse response = httpClient.execute(request);) {
			String result = EntityUtils.toString(response.getEntity());
			logger.trace(result);
			// parse the json result and find the largest id
			JSONObject obj = new JSONObject(result);
			JSONArray arr = obj.getJSONArray("result");
			for (int i = 0; i < arr.length(); i++) {
				String usernameFromId = arr.getJSONObject(i).getString("_id");
				String email = arr.getJSONObject(i).getString("mail");
				String username = arr.getJSONObject(i).getString("userName");
				String firstname = arr.getJSONObject(i).getString("givenName");
				String lastname = arr.getJSONObject(i).getString("sn");
				User user = new User(username, email, firstname, lastname);
				users.add(user);
				if (!user.idFromUsenameForForgeRock().equals(usernameFromId)) {
					logger.warn(
							"We modeled a single field for both id and username and the server has two different values ["
									+ usernameFromId + "] != [" + username
									+ "]. The first value will be used for both.");
				}
			}
		}
		return users;
	} catch (IOException e) {
		throw new RuntimeException(e);
	}
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
/**
 * Simple Http Get.
 *
 * @param path the path
 * @return the CloseableHttpResponse
 * @throws URISyntaxException the URI syntax exception
 * @throws IOException Signals that an I/O exception has occurred.
 * @throws MininetException the MininetException
 */
public CloseableHttpResponse simpleGet(String path) 
    throws URISyntaxException, IOException, MininetException {
  URI uri = new URIBuilder()
      .setScheme("http")
      .setHost(mininetServerIP.toString())
      .setPort(mininetServerPort.getPort())
      .setPath(path)
      .build();
  CloseableHttpClient client = HttpClientBuilder.create().build();
  RequestConfig config = RequestConfig
      .custom()
      .setConnectTimeout(CONNECTION_TIMEOUT_MS)
      .setConnectionRequestTimeout(CONNECTION_TIMEOUT_MS)
      .setSocketTimeout(CONNECTION_TIMEOUT_MS)
      .build();
  HttpGet request = new HttpGet(uri);
  request.setConfig(config);
  request.addHeader("Content-Type", "application/json");
  CloseableHttpResponse response = client.execute(request);
  if (response.getStatusLine().getStatusCode() >= 300) {
    throw new MininetException(String.format("failure - received a %d for %s.", 
        response.getStatusLine().getStatusCode(), request.getURI().toString()));
  }
  return response;
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
public DockerResponse sendDelete(URI uri, Boolean httpRequired) throws JSONClientException {

        if (logger.isDebugEnabled()) {
            logger.debug("Send a delete request to : " + uri);
        }
        CloseableHttpResponse response = null;
        try {
            CloseableHttpClient httpClient = buildSecureHttpClient();
            HttpDelete httpDelete = new HttpDelete(uri);
            response = httpClient.execute(httpDelete);
        } catch (IOException e) {
            throw new JSONClientException("Error in sendDelete method due to : " + e.getMessage(), e);
        }

        if (logger.isDebugEnabled()) {
            logger.debug("Status code : " + response.getStatusLine().getStatusCode());
        }

        return new DockerResponse(response.getStatusLine().getStatusCode(), "");
    }
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
public ResponseWrap(CloseableHttpClient httpClient, HttpRequestBase request, CloseableHttpResponse response, HttpClientContext context,
		ObjectMapper _mapper) {
	this.response = response;
	this.httpClient = httpClient;
	this.request = request;
	this.context = context;
	mapper = _mapper;

	try {
		HttpEntity entity = response.getEntity();
		if (entity != null) {
			this.entity = new BufferedHttpEntity(entity);
		} else {
			this.entity = new BasicHttpEntity();
		}

		EntityUtils.consumeQuietly(entity);
		this.response.close();
	} catch (IOException e) {
		logger.warn(e.getMessage());
	}
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
public static void main(String[] args) throws IOException, URISyntaxException {
	ObjectMapper mapper = new ObjectMapper();
	try (CloseableHttpClient client =
				 HttpClientBuilder.create().useSystemProperties().build()) {
		URI uri = new URIBuilder("http://api.geonames.org/searchJSON")
				.addParameter("q", "kabupaten garut")
				.addParameter("username", "ceefour")
				.build();
		HttpGet getRequest = new HttpGet(uri);
		try (CloseableHttpResponse resp = client.execute(getRequest)) {
			String body = IOUtils.toString(resp.getEntity().getContent(),
					StandardCharsets.UTF_8);
			JsonNode bodyNode = mapper.readTree(body);
			LOG.info("Status: {}", resp.getStatusLine());
			LOG.info("Headers: {}", resp.getAllHeaders());
			LOG.info("Body: {}", body);
			LOG.info("Body (JsonNode): {}", bodyNode);
			for (JsonNode child : bodyNode.get("geonames")) {
				LOG.info("Place: {} ({}, {})", child.get("toponymName"), child.get("lat"), child.get("lng"));
			}
		}
	}
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
/**
 * httpClient post 获取资源
 * @param url
 * @param params
 * @return
 */
public static String post(String url, Map<String, Object> params) {
	log.info(url);
	try {
		CloseableHttpClient httpClient = HttpClientBuilder.create().build();
		HttpPost httpPost = new HttpPost(url);
		if (params != null && params.size() > 0) {
			List<NameValuePair> nvps = new ArrayList<NameValuePair>();
			Set<String> keySet = params.keySet();
			for (String key : keySet) {
				Object object = params.get(key);
				nvps.add(new BasicNameValuePair(key, object==null?null:object.toString()));
			}
			httpPost.setEntity(new UrlEncodedFormEntity(nvps, "UTF-8"));
		}
		CloseableHttpResponse response = httpClient.execute(httpPost);
		return EntityUtils.toString(response.getEntity(), "UTF-8");
	} catch (Exception e) {
		log.error(e);
	}
	return null;
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
protected CloseableHttpClient constructHttpClient() throws IOException {
  RequestConfig config = RequestConfig.custom()
                                      .setConnectTimeout(20 * 1000)
                                      .setConnectionRequestTimeout(20 * 1000)
                                      .setSocketTimeout(20 * 1000)
                                      .setMaxRedirects(20)
                                      .build();

  URL                 mmsc          = new URL(apn.getMmsc());
  CredentialsProvider credsProvider = new BasicCredentialsProvider();

  if (apn.hasAuthentication()) {
    credsProvider.setCredentials(new AuthScope(mmsc.getHost(), mmsc.getPort() > -1 ? mmsc.getPort() : mmsc.getDefaultPort()),
                                 new UsernamePasswordCredentials(apn.getUsername(), apn.getPassword()));
  }

  return HttpClients.custom()
                    .setConnectionReuseStrategy(new NoConnectionReuseStrategyHC4())
                    .setRedirectStrategy(new LaxRedirectStrategy())
                    .setUserAgent(TextSecurePreferences.getMmsUserAgent(context, USER_AGENT))
                    .setConnectionManager(new BasicHttpClientConnectionManager())
                    .setDefaultRequestConfig(config)
                    .setDefaultCredentialsProvider(credsProvider)
                    .build();
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
private <REQ, RESP> RESP query(REQ request, Class<RESP> clazz) throws IOException, DruidException {
    CloseableHttpClient client = HttpClients.createDefault();
    HttpPost httpPost = new HttpPost(configuration.getUrl());

    StringEntity entity = new StringEntity(mapper.writeValueAsString(request), configuration.getCharset());
    httpPost.setEntity(entity);
    httpPost.setHeader("Content-type", "application/json");

    CloseableHttpResponse response = client.execute(httpPost);
    String content = EntityUtils.toString(response.getEntity(), configuration.getCharset());

    try {
        return mapper.readValue(content, clazz);
    } catch (Exception ex) {
        throw new DruidException(content);
    } finally {
        client.close();
    }
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
private static int getAttemptId(@NotNull Task task) throws IOException {
  final StepicWrappers.AdaptiveAttemptWrapper attemptWrapper = new StepicWrappers.AdaptiveAttemptWrapper(task.getStepId());

  final HttpPost post = new HttpPost(EduStepicNames.STEPIC_API_URL + EduStepicNames.ATTEMPTS);
  post.setEntity(new StringEntity(new Gson().toJson(attemptWrapper)));

  final CloseableHttpClient client = EduStepicAuthorizedClient.getHttpClient();
  if (client == null) return -1;
  setTimeout(post);
  final CloseableHttpResponse httpResponse = client.execute(post);
  final int statusCode = httpResponse.getStatusLine().getStatusCode();
  final HttpEntity entity = httpResponse.getEntity();
  final String entityString = EntityUtils.toString(entity);
  EntityUtils.consume(entity);
  if (statusCode == HttpStatus.SC_CREATED) {
    final StepicWrappers.AttemptContainer container =
      new Gson().fromJson(entityString, StepicWrappers.AttemptContainer.class);
    return (container.attempts != null && !container.attempts.isEmpty()) ? container.attempts.get(0).id : -1;
  }
  return -1;
}
 

import org.apache.http.impl.client.CloseableHttpClient; //导入依赖的package包/类
public <T> Response<T> execute() {
    HttpProxy httpProxy = getHttpProxyFromPool();
    CookieStore cookieStore = getCookieStoreFromPool();

    CloseableHttpClient httpClient = httpClientPool.getHttpClient(siteConfig, request);
    HttpUriRequest httpRequest = httpClientPool.createHttpUriRequest(siteConfig, request, createHttpHost(httpProxy));
    CloseableHttpResponse httpResponse = null;
    IOException executeException = null;
    try {
        HttpContext httpContext = createHttpContext(httpProxy, cookieStore);
        httpResponse = httpClient.execute(httpRequest, httpContext);
    } catch (IOException e) {
        executeException = e;
    }

    Response<T> response = ResponseFactory.createResponse(
            request.getResponseType(), siteConfig.getCharset(request.getUrl()));

    response.handleHttpResponse(httpResponse, executeException);

    return response;
}