2.因为要在android上使用websocket，要求使用wss，这时候我就选择了java_websocket(http://java-websocket.org/)

这个ws客户端对wss支持不好，源码中的wss client 还要使用证书。我的想法是不验证证书。将他的代码稍作修改：

import java.io.BufferedReader;

import java.io.File;

import java.io.FileInputStream;

import java.io.InputStreamReader;

import java.net.URI;

import java.security.KeyStore;

import javax.net.ssl.KeyManagerFactory;

import javax.net.ssl.SSLContext;

import javax.net.ssl.TrustManagerFactory;

import org.java_websocket.WebSocket;

import org.java_websocket.client.DefaultSSLWebSocketClientFactory;

import org.java_websocket.client.WebSocketClient;

import org.java_websocket.handshake.ServerHandshake;

class WebSocketChatClient extends WebSocketClient {

public WebSocketChatClient( URI serverUri ) {

super( serverUri );

}

@Override

public void onOpen( ServerHandshake handshakedata ) {

System.out.println( "Connected" );

}

@Override

public void onMessage( String message ) {

System.out.println( "got: " + message );

}

@Override

public void onClose( int code, String reason, boolean remote ) {

System.out.println( "Disconnected" );

System.exit( 0 );

}

@Override

public void onError( Exception ex ) {

ex.printStackTrace();

}

}

public class SSLClientExample {

// always verify the host - dont check for certificate

final static HostnameVerifier DO_NOT_VERIFY = new HostnameVerifier() {

public boolean verify(String hostname, SSLSession session) {

return true;

}

};

/**

* Trust every server - dont check for any certificate

*/

private static void trustAllHosts(AppWebSocketClient appClient) {

// Create a trust manager that does not validate certificate chains

TrustManager[] trustAllCerts = new TrustManager[]{new X509TrustManager() {

public java.security.cert.X509Certificate[] getAcceptedIssuers() {

return new java.security.cert.X509Certificate[]{};

}

public void checkClientTrusted(X509Certificate[] chain,

String authType) throws CertificateException {

}

public void checkServerTrusted(X509Certificate[] chain,

String authType) throws CertificateException {

}

}};

// Install the all-trusting trust manager

try {

SSLContext sc = SSLContext.getInstance("TLS");

sc.init(null, trustAllCerts, new java.security.SecureRandom());

appClient.setWebSocketFactory(new DefaultSSLWebSocketClientFactory(sc));

} catch (Exception e) {

e.printStackTrace();

}

}

public static void main( String[] args ) throws Exception {

WebSocket.DEBUG = true;

WebSocketChatClient chatclient = new WebSocketChatClient( new URI( "wss://localhost:8887" ) );

trustAllHosts(appClient);

chatclient.connectBlocking();

BufferedReader reader = new BufferedReader( new InputStreamReader( System.in ) );

while ( true ) {

String line = reader.readLine();

if( line.equals( "close" ) ) {

chatclient.close();

} else {

chatclient.send( line );

}

}

}

}