3，Android通过https与服务器端进行通信

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Https与Http类似，只不过Https一般是通过post请求服务器，但是Https与http不同的是Https与服务器会话是处于连接状态。http则发送请求后连接就会断开。

发送post请求代码：

String query = r4 + "&pass=" + r3; //请求参数byte[] entitydata = query.getBytes();//得到实体数据HttpsURLConnection urlCon = (new URL(ticketurl)).openConnection();urlCon.setRequestProperty("Content-Type", "application/x-www-form-urlencoded;charset=UTF-8");urlCon.setRequestProperty("Content-Length", String.valueOf(entitydata.length));((HttpsURLConnection) urlCon).setRequestMethod("POST");urlCon.setDoOutput(true);urlCon.setDoInput(true);urlCon.connect();//把封装好的实体数据发送到输出流OutputStream outStream = urlCon.getOutputStream();outStream.write(entitydata);outStream.flush();outStream.close();//服务器返回输入流并读写BufferedReader in = new BufferedReader(new InputStreamReader(urlCon.getInputStream()));String line;while ((line = in.readLine()) != null) {return line;}in.close();

另外使用HttpsURLConnection时需要实现HostnameVerifier 和 X509TrustManager，这两个实现是必须的，要不会报安全验证异常。然后初始化X509TrustManager中的SSLContext，为javax.net.ssl.HttpsURLConnection设置默认的SocketFactory和HostnameVerifier。

代码如下：

private myX509TrustManager xtm = new myX509TrustManager();private myHostnameVerifier hnv = new myHostnameVerifier();public HttpsURLConnectionTest() {//初始化X509TrustManager中的SSLContextSSLContext sslContext = null;try {sslContext = SSLContext.getInstance("TLS");X509TrustManager[] xtmArray = new X509TrustManager[] { xtm };sslContext.init(null, xtmArray, new java.security.SecureRandom());} catch (GeneralSecurityException gse) {}//为javax.net.ssl.HttpsURLConnection设置默认的SocketFactory和HostnameVerifierif (sslContext != null) {HttpsURLConnection.setDefaultSSLSocketFactory(sslContext.getSocketFactory());}HttpsURLConnection.setDefaultHostnameVerifier(hnv);}

这样就不会报错了。

转载地址：http://blog.sina.com.cn/s/blog_610c1cad01016zki.html

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