JAVA操作SSL协议，通过Socket访问Https问题

Java code

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());  }}

Java code

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;  }}

代码是百度来的，有些可以，比如说支付宝，程序中访问 www.alipay.com和浏览器直接访问www.alipay.com返回的响应是一样的
但是有个别的网站，用这个程序返回响应和访问域名不一样，和访问域名解析后的ip一样，比如说12306，浏览器访问域名正常，直接访问域名解析后的ip会错误，程序返回和浏览器访问ip返回一样
这是什么原因，怎么解决？？？


[解决办法]
具体返回什么了？