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。