一个封装的使用Apache HttpClient进行Http请求（GET、POST、PUT等）的类。
import com.qunar.payment.gateway.front.channel.mpgs.po.HttpReqEntity;import org.apache.http.HttpHeaders;import org.apache.http.auth.AuthScope;import org.apache.http.auth.UsernamePasswordCredentials;import org.apache.http.client.CredentialsProvider;import org.apache.http.client.config.RequestConfig;import org.apache.http.client.methods.CloseableHttpResponse;import org.apache.http.client.methods.HttpGet;import org.apache.http.client.methods.HttpPut;import org.apache.http.client.methods.HttpUriRequest;import org.apache.http.conn.ssl.NoopHostnameVerifier;import org.apache.http.conn.ssl.SSLConnectionSocketFactory;import org.apache.http.entity.StringEntity;import org.apache.http.impl.client.BasicCredentialsProvider;import org.apache.http.impl.client.CloseableHttpClient;import org.apache.http.impl.client.HttpClients;import org.apache.http.util.EntityUtils;import org.springframework.http.HttpMethod;import .ssl.SSLContext;import .ssl.TrustManager;import .ssl.X509TrustManager;import java.io.IOException;import java.security.KeyManagementException;import java.security.NoSuchAlgorithmException;import java.security.SecureRandom;import java.security.cert.X509Certificate;/*** User:xfyou Date:/11/23 10:50*/public class HttpUtil {private HttpUtil() {}private static CredentialsProvider credentialsProvider;private static final SSLConnectionSocketFactory SOCKET_FACTORY = getSocketFactory();private static final NoopHostnameVerifier NO_OP = new NoopHostnameVerifier();public static String execute(HttpReqEntity httpReqEntity) throws IOException {CloseableHttpClient httpclient = getClosableHttpClient(httpReqEntity);CloseableHttpResponse response = null;try {response = httpclient.execute(getHttpUriRequest(httpReqEntity));return EntityUtils.toString(response.getEntity());} finally {try {if (null != response) response.close();if (null != httpclient) httpclient.close();} catch (IOException ignored) {}}}private static TrustManager getTrustManagers() {return new X509TrustManager() {public X509Certificate[] getAcceptedIssuers() {return null;}public void checkClientTrusted(X509Certificate[] certs, String authType) {}public void checkServerTrusted(X509Certificate[] certs, String authType) {}};}private static SSLConnectionSocketFactory getSocketFactory() {SSLContext sslContext;try {sslContext = SSLContext.getInstance(MpgsConstant.SECURITYPROTOCOL_VERSION_TLS_1_2);} catch (NoSuchAlgorithmException e) {return null;}try {sslContext.init(null, new TrustManager[]{getTrustManagers()}, new SecureRandom());} catch (KeyManagementException e) {return null;}return new SSLConnectionSocketFactory(sslContext);}private static CloseableHttpClient getClosableHttpClient(HttpReqEntity entity) {return HttpClients.custom().setSSLSocketFactory(SOCKET_FACTORY).setSSLHostnameVerifier(NO_OP).setDefaultCredentialsProvider(getCredentialsProvider(entity.getCredUserName(), entity.getCredPasswd())).build();}private static HttpPut getHttpPut(String requestUrl, String requestMessage, RequestConfig config) {HttpPut httpPut = new HttpPut(requestUrl);httpPut.setConfig(config);httpPut.addHeader(HttpHeaders.CONTENT_TYPE, MpgsConstant.CONTENTTYPE_JSON);httpPut.setEntity(new StringEntity(requestMessage, MpgsConstant.CHARSET_UTF8));return httpPut;}private static HttpGet getHttpGet(String requestUrl, RequestConfig config) {HttpGet httpGet = new HttpGet(requestUrl);httpGet.setConfig(config);return httpGet;}private static HttpUriRequest getHttpUriRequest(HttpReqEntity entity) {return entity.getHttpMethod() == HttpMethod.GET ? getHttpGet(entity.getRequestUrl(), entity.getRequestConfig()): getHttpPut(entity.getRequestUrl(), entity.getRequestMessage(), entity.getRequestConfig());}private static CredentialsProvider getCredentialsProvider(String userName, String passwd) {if (null == credentialsProvider) {synchronized (HttpUtil.class) {if (null == credentialsProvider) {CredentialsProvider credsProvider = new BasicCredentialsProvider();credsProvider.setCredentials(AuthScope.ANY, new UsernamePasswordCredentials(userName, passwd));credentialsProvider = credsProvider;}}}return credentialsProvider;}}
