httpclient调用方法

/**

 * GET请求

 * 

 * @param url

 *            请求url,参数拼在请求串中

 */

public static String get(String url) {

String responseContent = null;

// 创建默认的httpClient实例.

CloseableHttpClient httpclient = HttpClients.createDefault();

CloseableHttpResponse response = null;

HttpGet httpGet = new HttpGet(url);

Logger.getRootLogger().info("--------------------------------------------");

Logger.getRootLogger().info("GET " + httpGet.getURI());

// 执行get请求.

try {

response = httpclient.execute(httpGet);

HttpEntity entity = response.getEntity();

// 打印响应状态

Logger.getRootLogger().info(response.getStatusLine());

if (entity != null) {

responseContent = EntityUtils.toString(entity);

// 打印响应内容

Logger.getRootLogger().info("Response content: "+ responseContent);

Logger.getRootLogger().info("--------------------------------------------");

}

} catch (Exception e) {

e.printStackTrace();

} finally {

try {

httpclient.close();

response.close();

} catch (IOException e) {

e.printStackTrace();

}

}

return responseContent;

 

}

 

/**

 * 

 * @param url

 * @param paramMap

 */

public static String post(String url, Map<String, String> paramMap) {

String responseContent = null;

// 创建默认的httpClient实例.

CloseableHttpClient httpclient = HttpClients.createDefault();

// 创建httppost

HttpPost httppost = new HttpPost(url);

Logger.getRootLogger().info("--------------------------------------------");

Logger.getRootLogger().info("POST " + httppost.getURI());

// 创建参数队列

List<BasicNameValuePair> formparams = new ArrayList<BasicNameValuePair>();

if (paramMap != null) {

Set<String> key = paramMap.keySet();

for (Iterator<String> it = key.iterator(); it.hasNext();) {

String paramKey = (String) it.next();

formparams.add(new BasicNameValuePair(paramKey, paramMap

.get(paramKey)));

Logger.getRootLogger().info(paramKey+" = "+paramMap.get(paramKey));

}

}

 

UrlEncodedFormEntity uefEntity;

try {

uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8");

httppost.setEntity(uefEntity);

CloseableHttpResponse response = httpclient.execute(httppost);

try {

HttpEntity entity = response.getEntity();

Logger.getRootLogger().info(response.getStatusLine());

if (entity != null) {

responseContent = EntityUtils.toString(entity, "UTF-8");

Logger.getRootLogger().info("Response content: "+ responseContent);

Logger.getRootLogger().info("--------------------------------------------");

}

} finally {

response.close();

}

} catch (ClientProtocolException e) {

e.printStackTrace();

} catch (UnsupportedEncodingException e1) {

e1.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

// 关闭连接,释放资源

try {

httpclient.close();

} catch (IOException e) {

e.printStackTrace();

}

}

return responseContent;

}