HttpClient请求https的实例：

import javax.net.ssl.SSLContext;import javax.net.ssl.TrustManager;import javax.net.ssl.X509TrustManager;import java.security.cert.CertificateException;import java.security.cert.X509Certificate;import org.apache.http.client.ClientProtocolException;import org.apache.http.client.HttpClient;import org.apache.http.client.ResponseHandler;import org.apache.http.client.methods.HttpGet;import org.apache.http.conn.ClientConnectionManager;import org.apache.http.conn.scheme.Scheme;import org.apache.http.conn.scheme.SchemeRegistry;import org.apache.http.conn.scheme.SchemeSocketFactory;import org.apache.http.conn.ssl.SSLSocketFactory;import org.apache.http.impl.client.BasicResponseHandler;import org.apache.http.impl.client.ClientParamsStack;import org.apache.http.impl.client.DefaultHttpClient;import org.apache.http.params.DefaultedHttpParams;import org.apache.http.params.HttpParams;public class HttpClientTest {	public static void main(String args[]) {		try {			HttpClient httpclient = new DefaultHttpClient();                        //Secure Protocol implementation.			SSLContext ctx = SSLContext.getInstance("SSL");                        //Implementation of a trust manager for X509 certificates			X509TrustManager tm = new X509TrustManager() {				public void checkClientTrusted(X509Certificate[] xcs,						String string) throws CertificateException {				}				public void checkServerTrusted(X509Certificate[] xcs,						String string) throws CertificateException {				}				public X509Certificate[] getAcceptedIssuers() {					return null;				}			};			ctx.init(null, new TrustManager[] { tm }, null);			SSLSocketFactory ssf = new SSLSocketFactory(ctx);			ClientConnectionManager ccm = httpclient.getConnectionManager();                        //register https protocol in httpclient's scheme registry			SchemeRegistry sr = ccm.getSchemeRegistry();			sr.register(new Scheme("https", 443, ssf));			HttpGet httpget = new HttpGet("");			HttpParams params = httpclient.getParams();			params.setParameter("param1", "paramValue1");			httpget.setParams(params);			System.out.println("REQUEST:" + httpget.getURI());			ResponseHandler responseHandler = new BasicResponseHandler();			String responseBody;			responseBody = httpclient.execute(httpget, responseHandler);			System.out.println(responseBody);			// Create a response handler		} catch (NoSuchAlgorithmException e) {			// TODO Auto-generated catch block			e.printStackTrace();		} catch (ClientProtocolException e) {			// TODO Auto-generated catch block			e.printStackTrace();		} catch (IOException e) {			// TODO Auto-generated catch block			e.printStackTrace();		} catch (Exception ex) {			ex.printStackTrace();		}	}}