轉自：http://jingfeng198.blog.163.com/blog/static/46255920129153312606/

用下面的程式碼就可以搞定。例子程式碼使用httpclient4.1

import java.security.cert.X509Certificate;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.http.HttpEntity;
import org.apache.http.HttpHost;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.conn.ClientConnectionManager;
import org.apache.http.conn.params.ConnRoutePNames;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

public class TestSsl {

    HttpClient httpclient = new DefaultHttpClient();

    public static void main(String[] args) throws Exception {

        TestSsl t = new TestSsl();
        t.init();
        t.queryData();
    }

    private void init() {
        HttpHost proxy = new HttpHost("172.168.1.110", 8080, "http");
        httpclient = wrapClient(httpclient);
        httpclient.getParams().setParameter(ConnRoutePNames.DEFAULT_PROXY,
                proxy);
        httpclient.getParams()
                .setIntParameter("http.socket.timeout", 30 * 1000);
    }

    /**
     *
     * @throws Exception
     */
    private void queryData() throws Exception {
        HttpGet httpget = new HttpGet("https://localhost/test.jsp");
        HttpResponse response = httpclient.execute(httpget);

        System.out.println("Login form get: " + response.getStatusLine());
        HttpEntity entity = response.getEntity();
        String result = EntityUtils.toString(entity);
        System.out.println(result);
        EntityUtils.consume(entity);

    }

    /**
     * 獲取可信任https連結，以避免不受信任證書出現peer not authenticated異常
     *
     * @param base
     * @return
     */
    public static HttpClient wrapClient(HttpClient base) {
        try {
            SSLContext ctx = SSLContext.getInstance("TLS");
            X509TrustManager tm = new X509TrustManager() {
                public void checkClientTrusted(X509Certificate[] xcs,
                        String string) {
                }

                public void checkServerTrusted(X509Certificate[] xcs,
                        String string) {
                }

                public X509Certificate[] getAcceptedIssuers() {
                    return null;
                }
            };
            ctx.init(null, new TrustManager[] { tm }, null);
            SSLSocketFactory ssf = new SSLSocketFactory(ctx);
            ssf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
            ClientConnectionManager ccm = base.getConnectionManager();
            SchemeRegistry sr = ccm.getSchemeRegistry();
            sr.register(new Scheme("https", ssf, 443));
            return new DefaultHttpClient(ccm, base.getParams());
        } catch (Exception ex) {
            ex.printStackTrace();
            return null;
        }
    }
}