httpclient访问https服务，可以信任证书

private HttpClient initHttpClient() {
	if(httpclient == null){
		try {
			X509TrustManager tm = new X509TrustManager() {
				public void checkClientTrusted(X509Certificate[] arg0,
						String arg1) throws CertificateException {
				}

				public void checkServerTrusted(X509Certificate[] arg0,
						String arg1) throws CertificateException {
				}

				public X509Certificate[] getAcceptedIssuers() {
					return null;
				}
			};
			SSLContext sslcontext = SSLContext.getInstance("TLS");
			sslcontext.init(null, new TrustManager[] { tm }, null);
			SSLSocketFactory ssf = new SSLSocketFactory(sslcontext);
			ClientConnectionManager ccm = new DefaultHttpClient().getConnectionManager();
			SchemeRegistry sr = ccm.getSchemeRegistry();
			sr.register(new Scheme("https", 8443, ssf));
			HttpParams params = new BasicHttpParams();
			params.setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 1000);
			params.setParameter(CoreConnectionPNames.SO_TIMEOUT, 5000);
			httpclient = new DefaultHttpClient(ccm,params);
		} catch (Exception ex) {
			ex.printStackTrace();
		}
	}
	return httpclient;
}