private static void trustAllHttpsCertificates() throws Exception {
    javax.net.ssl.TrustManager[] trustAllCerts = new javax.net.ssl.TrustManager[1];
    javax.net.ssl.TrustManager tm = new miTM();
    trustAllCerts[0] = tm;
    javax.net.ssl.SSLContext sc = javax.net.ssl.SSLContext.getInstance("SSL");
    sc.init(null, trustAllCerts, null);
    javax.net.ssl.HttpsURLConnection.setDefaultSSLSocketFactory(sc.getSocketFactory());
}
static class miTM implements javax.net.ssl.TrustManager, javax.net.ssl.X509TrustManager {
    public java.security.cert.X509Certificate[] getAcceptedIssuers() {
        return null;
    }
    public boolean isServerTrusted(java.security.cert.X509Certificate[] certs) {
        return true;
    }
    public boolean isClientTrusted(java.security.cert.X509Certificate[] certs) {
        return true;
    }
    public void checkServerTrusted(java.security.cert.X509Certificate[] certs, String authType)
        throws java.security.cert.CertificateException {
        return;
    }
    public void checkClientTrusted(java.security.cert.X509Certificate[] certs, String authType)
        throws java.security.cert.CertificateException {
        return;
    }
}

在你要

HttpURLConnection conn = (HttpURLConnection) url.openConnection();

以前，运行下面几行代码：

trustAllHttpsCertificates();
HostnameVerifier hv = new HostnameVerifier() {
public boolean verify(String urlHostName, SSLSession session) {
    return true;
}
};
HttpsURLConnection.setDefaultHostnameVerifier(hv);

所包含的包：

import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.HttpsURLConnection;
import javax.net.ssl.SSLSession;

另一种方法

SSLSocketFactory.getSocketFactory().setHostnameVerifier(new AllowAllHostnameVerifier());

java 绕过ssl访问webservice

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