在做Android客户端通过https协议访问12306，并爬取数据时，出现了如下错误：

其中有一条错误提示是 javax.net.ssl.SSLPeerUnverifiedException: No peer certificate的异常。现给出解决方法。

写了一个自定义类继承SSLSocketFactory：

import java.io.IOException;
import java.net.Socket;
import java.net.UnknownHostException;
import java.security.KeyManagementException;
import java.security.KeyStore;
import java.security.KeyStoreException;
import java.security.NoSuchAlgorithmException;
import java.security.UnrecoverableKeyException;
import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;
import org.apache.http.conn.ssl.SSLSocketFactory;
public class SSLSocketFactoryEx extends SSLSocketFactory {
        SSLContext sslContext = SSLContext.getInstance("TLS");
        public SSLSocketFactoryEx(KeyStore truststore)
                        throws NoSuchAlgorithmException, KeyManagementException,
                        KeyStoreException, UnrecoverableKeyException {
                super(truststore);
                TrustManager tm = new X509TrustManager() {
                        public java.security.cert.X509Certificate[] getAcceptedIssuers() {return null;}  
            @Override  
            public void checkClientTrusted(
                            java.security.cert.X509Certificate[] chain, String authType)
                                            throws java.security.cert.CertificateException {}  
            @Override  
            public void checkServerTrusted(
                            java.security.cert.X509Certificate[] chain, String authType)
                                            throws java.security.cert.CertificateException {}
        };  
        sslContext.init(null, new TrustManager[] { tm }, null);  
    }  

    
    @Override  
    public Socket createSocket(Socket socket, String host, int port,boolean autoClose) throws IOException, UnknownHostException {  
            return sslContext.getSocketFactory().createSocket(socket, host, port,autoClose);  
    }  

    @Override  
    public Socket createSocket() throws IOException {  
        return sslContext.getSocketFactory().createSocket();  
    }  
}

再来看看如何做回调：

public static HttpClient getNewHttpClient() {  
        try {  
            KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType());  
            trustStore.load(null, null);  
            SSLSocketFactory sf = new SSLSocketFactoryEx(trustStore);  
            sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);  
            HttpParams params = new BasicHttpParams();  
            HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);  
            HttpProtocolParams.setContentCharset(params, HTTP.UTF_8);  
            SchemeRegistry registry = new SchemeRegistry();  
            registry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));  
            registry.register(new Scheme("https", sf, 443));  
            ClientConnectionManager ccm = new ThreadSafeClientConnManager(params, registry);  
            return new DefaultHttpClient(ccm, params);  
        } catch (Exception e) {  
            return new DefaultHttpClient();  
        }  
    }  

现在就可以拿这个HTTPClient去请求数据了。