java https忽略证书

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.UnsupportedEncodingException;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import java.security.cert.X509Certificate;
import javax.net.ssl.SSLContext;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLSession;


public class HttpsUtils {

    final static HostnameVerifier DO_NOT_VERIFY = new HostnameVerifier() {
        @Override
		public boolean verify(String hostname, SSLSession session) {
            return true;
        }
    };

    /**
     * https get请求
     * @param requetsUrl
     * @return
     */
    public static String httpGet(String requetsUrl) {
		InputStream is = null;
		BufferedReader br = null;
		StringBuffer result = new StringBuffer();
        HttpURLConnection conn = null;
        try {
            // Create a trust manager that does not validate certificate chains
            trustAllHosts();
            URL url = new URL(requetsUrl);

            HttpsURLConnection https = (HttpsURLConnection) url.openConnection();
            if (url.getProtocol().toLowerCase().equals("https")) {
                https.setHostnameVerifier(DO_NOT_VERIFY);
                conn = https;
            } else {
                conn = (HttpURLConnection) url.openConnection();
            }
            conn.connect();
			if (conn.getResponseCode() == 200) {
				is = conn.getInputStream();
				if (null != is) {
					br = new BufferedReader(new InputStreamReader(is, "UTF-8"));
					String temp = null;
					while (null != (temp = br.readLine())) {
						result.append(temp);
					}
				}
			}
        } catch (UnsupportedEncodingException e) {
            e.printStackTrace();
        } catch (MalformedURLException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result.toString();
    }

    /**
     * 证书校验
     */
    private static void trustAllHosts() {

        // Create a trust manager that does not validate certificate chains
        TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {

            @Override
			public java.security.cert.X509Certificate[] getAcceptedIssuers() {
                return new java.security.cert.X509Certificate[]{};
            }

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

            @Override
			public void checkServerTrusted(X509Certificate[] chain, String authType) {
            }
        }};

        // Install the all-trusting trust manager
        try {
            SSLContext sc = SSLContext.getInstance("TLS");
            sc.init(null, trustAllCerts, new java.security.SecureRandom());
            HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}