import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.net.Socket;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

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


/**
 * JAVA操作SSL协议，通过Socket访问Https的程序代码例子。
 * 
 * @author JAVA世纪网(java2000.net)
 * 
 */
public class ReadHttpsURL {
  // 默认的HTTPS 端口
  static final int HTTPS_PORT = 443;

  public static void main(String argv[]) throws Exception {
    // 受访主机
//    String host = "www.google.com";
    // 受访的页面
//    String url = "/adsense/?sourceid=aso&subid=ZH_CN-ET-AS-ADSBY6&medium=link&hl=zh_CN";
      String host = "www.alipay.com";
      String url = "/";
    // 自定义的管理器
    X509TrustManager xtm = new Java2000TrustManager();
    TrustManager mytm[] = { xtm };
    // 得到上下文
    SSLContext ctx = SSLContext.getInstance("SSL");
    // 初始化
    ctx.init(null, mytm, null);
    // 获得工厂
    SSLSocketFactory factory = ctx.getSocketFactory();

    // 从工厂获得Socket连接
    Socket socket = factory.createSocket(host, HTTPS_PORT);

    // 剩下的就和普通的Socket操作一样了
    BufferedWriter out = new BufferedWriter(new OutputStreamWriter(socket.getOutputStream()));
    BufferedReader in = new BufferedReader(new InputStreamReader(socket.getInputStream()));
    out.write("GET " + url + " HTTP/1.0\n\n");
    out.flush();
    System.out.println("start   work!");
    String line;
    StringBuffer sb = new StringBuffer();
    while ((line = in.readLine()) != null) {
      sb.append(line + "\n");
    }
    out.close();
    in.close();
    System.out.println(sb.toString());
  }
}

import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.X509TrustManager;

/**
 * 自定义的认证管理类。
 * 
 * @author JAVA世纪网(java2000.net)
 * 
 */
class Java2000TrustManager implements X509TrustManager {
  Java2000TrustManager() {
    // 这里可以进行证书的初始化操作
  }

  // 检查客户端的可信任状态
  public void checkClientTrusted(X509Certificate chain[], String authType) throws CertificateException {
    System.out.println("检查客户端的可信任状态...");
  }

  // 检查服务器的可信任状态
  public void checkServerTrusted(X509Certificate chain[], String authType) throws CertificateException {
    System.out.println("检查服务器的可信任状态");
  }

  // 返回接受的发行商数组
  public X509Certificate[] getAcceptedIssuers() {
    System.out.println("获取接受的发行商数组...");
    return null;
  }
}