自動擷取憑證與Https頁面資料

在寫JSP使用Redirect的時候，如果是導向HTTPS頁面，也可能發生某些異常。
1. java.net.MalformedURLException: unknown protocol https
ANS: 使用的方法不是 HTTPS 的方式，將jce.jar與jsse.jar導入classpath，在使用https連線函式
2. 頁面停留過久
ANS: 就像打開IE一樣，會叫你點選接受憑證，這時用程式跑就自動停住了，居然不會timeout

<%@ page import="java.net.URL"%>
<%@ page import="java.net.URLEncoder"%>
<%@ page import="java.net.URLConnection"%>

<%@ page import="javax.net.ssl.HttpsURLConnection"%>
<%@ page import="javax.net.ssl.HostnameVerifier"%>
<%@ page import="javax.net.ssl.HttpsURLConnection"%>
<%@ page import="javax.net.ssl.SSLContext"%>
<%@ page import="javax.net.ssl.SSLSession"%>
<%@ page import="javax.net.ssl.TrustManager"%>
<%@ page import="javax.net.ssl.X509TrustManager"%>
<%@ page import="javax.security.cert.X509Certificate"%>
<%@ page import="javax.security.cert.CertificateException"%>
<%@ page import="java.security.SecureRandom"%>

/***
* more code
* skip
*/

/***********憑證擷取開始**************/
TrustManager[] trustAllCerts = new TrustManager[] { new X509TrustManager() {
  public java.security.cert.X509Certificate[] getAcceptedIssuers() {
    return null;
  }

  public void checkClientTrusted(java.security.cert.X509Certificate[] certs,String authType) {
  }

  public void checkServerTrusted(java.security.cert.X509Certificate[] certs,String authType) {
  }
} };

HostnameVerifier dummyHostnameVerifier = new HostnameVerifier() {
  public boolean verify(String hostname, SSLSession session) {
    return true;
  }
};
SSLContext sc = SSLContext.getInstance("SSL");
sc.init(null, trustAllCerts, new SecureRandom());
HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
HttpsURLConnection.setDefaultHostnameVerifier(dummyHostnameVerifier);
/***********憑證擷取結束**************/

/***********擷取HTTPS頁面開始**************/
String httpsURL = "<https網址>"
try{
  url = new URL(httpsURL);

  Httpshurlconnection hurlc = (Httpshurlconnection) url.openConnection();
  hurlc.setRequestMethod("POST");
  InputStream inputStream = hurlc.getInputStream();
  LineNumberReader reader = new LineNumberReader(new InputStreamReader(inputStream));
  while (true) {
    tmp = reader.readLine();
    if (tmp == null)
      break;
    out.print(tmp);
  }
} catch (Exception e) {
  e.printStack();
}
/***********憑證擷取結束**************/

/***
* more code
* skip
*/