java请求WEB服务器 获取页面返回，且支持HTTPS，获取cret证书

/**
　* 可抓取页面内容 和 网站 证书信息
　* 第三方OAUTH互联登录的时候 可以利用请求获取返回值

  **/

import java.io.*;
import java.net.*;
import java.security.*;
import java.security.cert.*;
import javax.net.ssl.*;

public class SendUrlHttps {
    String url = "";
    myX509TrustManager xtm = new myX509TrustManager();
    myHostnameVerifier hnv = new myHostnameVerifier();

    public String getResult(String HttpsUrl) {
        this.url = HttpsUrl;
        SSLContext sslContext = null;
        try {
            sslContext = SSLContext.getInstance("TLS");
            X509TrustManager[] xtmArray = new X509TrustManager[] { xtm };
            sslContext.init(null, xtmArray, new java.security.SecureRandom());
        } catch (GeneralSecurityException gse) {
        }
        if (sslContext != null) {
            HttpsURLConnection.setDefaultSSLSocketFactory(sslContext
                    .getSocketFactory());
        }
        HttpsURLConnection.setDefaultHostnameVerifier(hnv);
        String res = "";
        try {

            URLConnection urlCon = (new URL(url)).openConnection();

            BufferedReader in = new BufferedReader(new InputStreamReader(
                    urlCon.getInputStream()));
            String line;
            while ((line = in.readLine()) != null) {
                // System.out.println(line);
                res += line;
            }
        } catch (MalformedURLException mue) {
            mue.printStackTrace();
        } catch (IOException ioe) {
            ioe.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }

        return res;

    }

    public static void main(String args[]) {
        SendUrlHttps t = new SendUrlHttps();
        String s = t.getResult("https://kyfw.12306.cn");
        System.out.println(s);
    }
}

class myX509TrustManager implements X509TrustManager {
    public myX509TrustManager() {
    }

    public void checkClientTrusted(X509Certificate[] chain, String authType) {
    }

    public void checkServerTrusted(X509Certificate[] chain, String authType) {
         System.out.println("cert: " + chain[0].toString() + ", authType: " +
         authType);
    }

    public X509Certificate[] getAcceptedIssuers() {
        return null;
    }
}

class myHostnameVerifier implements HostnameVerifier {
    public myHostnameVerifier() {
    }

    public boolean verify(String hostname, SSLSession session) {
        System.out.println("hostname: " + hostname);
        return true;
    }
}