HttpClient实现调用外部项目接口工具类的示例

import java.io.IOException;import java.net.URL;import java.util.ArrayList;import java.util.List;import java.util.Map;import org.apache.http.NameValuePair;import org.apache.http.HttpEntity;import org.apache.http.client.config.RequestConfig;import org.apache.http.client.entity.UrlEncodedFormEntity;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPost;import org.apache.http.conn.ssl.DefaultHostnameVerifier;import org.apache.http.conn.util.PublicSuffixMatcher;import org.apache.http.conn.util.PublicSuffixMatcherLoader;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.message.BasicNameValuePair;import org.apache.http.util.EntityUtils;public class HttpUtils { private static RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(15000).setConnectTimeout(15000)  .setConnectionRequestTimeout(15000).build(); public static String sendHttpGet(HttpGet httpGet) { CloseableHttpClient httpClient = null; CloseableHttpResponse response = null; HttpEntity entity = null; String responseContent = null; try {  // 创建默认的httpClient实例.  httpClient = HttpClients.createDefault();  httpGet.setConfig(requestConfig);     // 执行请求  response = httpClient.execute(httpGet);  entity = response.getEntity();  responseContent = EntityUtils.toString(entity, "UTF-8"); } catch (Exception e) {  e.printStackTrace(); } finally {  try {  // 关闭连接,释放资源  if (response != null) {   response.close();  }  if (httpClient != null) {   httpClient.close();  }  } catch (IOException e) {  e.printStackTrace();  } } return responseContent; } /**    * 发送 post请求    * @param httpUrl 地址    * @param maps 参数    */   public static String sendHttpPost(String httpUrl, Map<String, String> maps) {     HttpPost httpPost = new HttpPost(httpUrl);// 创建httpPost      // 创建参数队列      List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>();     for (String key : maps.keySet()) {       nameValuePairs.add(new BasicNameValuePair(key, maps.get(key)));     }     try {       httpPost.setEntity(new UrlEncodedFormEntity(nameValuePairs, "UTF-8"));     } catch (Exception e) {       e.printStackTrace();     }     return sendHttpPost(httpPost);   }        public static String sendHttpPost(HttpPost httpPost) { CloseableHttpClient httpClient = null; CloseableHttpResponse response = null; HttpEntity entity = null; String responseContent = null; try {  // 创建默认的httpClient实例.  httpClient = HttpClients.createDefault();  httpPost.setConfig(requestConfig);  // 执行请求  response = httpClient.execute(httpPost);  entity = response.getEntity();  responseContent = EntityUtils.toString(entity, "UTF-8"); } catch (Exception e) {  e.printStackTrace(); } finally {  try {  // 关闭连接,释放资源  if (response != null) {   response.close();  }  if (httpClient != null) {   httpClient.close();  }  } catch (IOException e) {  e.printStackTrace();  } } return responseContent; }  /**    * 发送Get请求Https    * @param httpPost    * @return    */   public static String sendHttpsGet(HttpGet httpGet) {     CloseableHttpClient httpClient = null;     CloseableHttpResponse response = null;     HttpEntity entity = null;     String responseContent = null;     try {       // 创建默认的httpClient实例.       PublicSuffixMatcher publicSuffixMatcher = PublicSuffixMatcherLoader.load(new URL(httpGet.getURI().toString()));       DefaultHostnameVerifier hostnameVerifier = new DefaultHostnameVerifier(publicSuffixMatcher);       httpClient = HttpClients.custom().setSSLHostnameVerifier(hostnameVerifier).build();       httpGet.setConfig(requestConfig);       // 执行请求       response = httpClient.execute(httpGet);       entity = response.getEntity();       responseContent = EntityUtils.toString(entity, "UTF-8");     } catch (Exception e) {       e.printStackTrace();     } finally {       try {         // 关闭连接,释放资源         if (response != null) {           response.close();         }         if (httpClient != null) {           httpClient.close();         }       } catch (IOException e) {         e.printStackTrace();       }     }     return responseContent;   } }