取request中個人的證書

/**
   * 取ssldn域
   */
  java.security.cert.X509Certificate[] certChain =
   (java.security.cert.X509Certificate[]) req.getAttribute(
    "javax.net.ssl.peer_certificates");

if (certChain != null) {
   DN = certChain[0].getSubjectDN().getName().trim();
   System.err.println("取ssldn域-------------------" + DN);
}