进行HTTPS调用时出现NullPointerException

Question

我过去几天一直在讨论这个问题。 我正在尝试将数据发布到安装了SSL证书的服务器上。

我一直在使用EasySSLSocketFactory和这里的EasyX509TrustManager类（ http://code.google.com/p/transdroid/source/browse/trunk/src/org/xmlrpc/android/?r=103 ）以下代码：

StringEntity se = null;
try {
    se = new StringEntity(tripArray.toString());
} catch (UnsupportedEncodingException e) { }

SchemeRegistry schemeRegistry = new SchemeRegistry();
schemeRegistry.register(new Scheme("http", PlainSocketFactory.getSocketFactory(), 80));
schemeRegistry.register(new Scheme("https", new EasySSLSocketFactory(), 443));

HttpParams params = new BasicHttpParams();
params.setParameter(ConnManagerPNames.MAX_TOTAL_CONNECTIONS, 30);
params.setParameter(ConnManagerPNames.MAX_CONNECTIONS_PER_ROUTE, new ConnPerRouteBean(30));
params.setParameter(HttpProtocolParams.USE_EXPECT_CONTINUE, false);
HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1);

ClientConnectionManager cm = new SingleClientConnManager(params, schemeRegistry);
this.httpClient = new DefaultHttpClient(cm, params); 

HttpPost httpPost = new HttpPost("https://xxx");
httpPost.setEntity(se);
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-type", "application/json");

ResponseHandler responseHandler = new BasicResponseHandler();
try {
    String response = this.httpClient.execute(httpPost, responseHandler).toString();
} catch (ClientProtocolException e) {
    tripFail = true;
} catch (IOException e) {
    tripFail = true;
}

但我似乎从我的要求中得到了以下回复：

Thread [<10> Timer-1] (Suspended (exception NullPointerException))  
    Class.forName(String, boolean, ClassLoader) line: 234   
    Class.forName(String) line: 181 
    X509Certificate.<clinit>() line: 60 
    OpenSSLSocketImplWrapper(OpenSSLSocketImpl).verifyCertificateChain(byte[][], String) line: 658  
    NativeCrypto.SSL_do_handshake(int, FileDescriptor, NativeCrypto$SSLHandshakeCallbacks, int, boolean) line: not available [native method]    
    OpenSSLSocketImplWrapper(OpenSSLSocketImpl).startHandshake(boolean) line: 474   
    OpenSSLSocketImpl$SSLInputStream.<init>(OpenSSLSocketImpl) line: 750    
    OpenSSLSocketImplWrapper(OpenSSLSocketImpl).getInputStream() line: 692  
    SocketInputBuffer.<init>(Socket, int, HttpParams) line: 98  
    DefaultClientConnection(SocketHttpClientConnection).createSessionInputBuffer(Socket, int, HttpParams) line: 83  
    DefaultClientConnection.createSessionInputBuffer(Socket, int, HttpParams) line: 170 
    DefaultClientConnection(SocketHttpClientConnection).bind(Socket, HttpParams) line: 106  
    DefaultClientConnection.openCompleted(boolean, HttpParams) line: 129    
    DefaultClientConnectionOperator.openConnection(OperatedClientConnection, HttpHost, InetAddress, HttpContext, HttpParams) line: 171  
    SingleClientConnManager$PoolEntry(AbstractPoolEntry).open(HttpRoute, HttpContext, HttpParams) line: 164 
    SingleClientConnManager$ConnAdapter(AbstractPooledConnAdapter).open(HttpRoute, HttpContext, HttpParams) line: 119   
    DefaultRequestDirector.execute(HttpHost, HttpRequest, HttpContext) line: 359    
    DefaultHttpClient(AbstractHttpClient).execute(HttpHost, HttpRequest, HttpContext) line: 555 
    DefaultHttpClient(AbstractHttpClient).execute(HttpHost, HttpRequest, ResponseHandler, HttpContext) line: 653    
    DefaultHttpClient(AbstractHttpClient).execute(HttpUriRequest, ResponseHandler, HttpContext) line: 627   
    DefaultHttpClient(AbstractHttpClient).execute(HttpUriRequest, ResponseHandler) line: 616    
    DataSender.sendData() line: 151 
    DataSender$1.run() line: 202    
    Timer$TimerImpl.run() line: 284 

有谁知道是什么原因引起的？ 我有点难过这个..

编辑：

我认为问题出在这里

Class.forName(String, boolean, ClassLoader) line: 234   
    Class.forName(String) line: 181 

代码似乎是将一个空字符串传递给Class.forName（）函数，导致它纾困..但我不确定是什么调用它以及为什么。

谢谢，奥利

Answer 1

经过长时间的讨论，解决方案是

使用IntelliJ IDEA ;-)

Answer 2

看起来Eclipse对我来说是个问题。 正如gabe所说，Intellij idea社区版编译代码很好并且不会导致NullPointerException。 我不知道是什么导致它，不知道如何解决它。 我将从现在开始使用不同的IDE。