项目中Android https请求地址遇到了这个异常(无终端认证)：
javax.net.ssl.SSLPeerUnverifiedException: No peer certificate
是SSL协议中没有终端认证。
没有遇到过的问题，于是无奈的去找度娘。。。。。。。，各种问题，各种纠结。。。。。。
看了不少大神的博客后得到的解决方案如下：
<span style="font-family:Times New Roman;font-size:14px;">/** * Post请求连接Https服务 * @param serverURL 请求地址 * @param jsonStr 请求报文 * @return * @throws Exception */ public static synchronized String doHttpsPost(String serverURL, String jsonStr)throws Exception { <span style="color:#009900;">// 参数 </span> HttpParams httpParameters = new BasicHttpParams(); <span style="color:#33cc00;"> </span><span style="color:#009900;">// 设置连接超时 </span> HttpConnectionParams.setConnectionTimeout(httpParameters, 3000); <span style="color:#009900;">// 设置socket超时 </span> HttpConnectionParams.setSoTimeout(httpParameters, 3000); <span style="color:#009900;">// 获取HttpClient对象 （认证） </span> HttpClient hc = initHttpClient(httpParameters); HttpPost post = new HttpPost(serverURL); <span style="color:#006600;"> </span><span style="color:#009900;">// 发送数据类型 </span> post.addHeader("Content-Type", "application/json;charset=utf-8"); <span style="color:#009900;"> // 接受数据类型 </span> post.addHeader("Accept", "application/json"); <span style="background-color: rgb(255, 255, 255);"><span style="color:#006600;"> </span><span style="color:#009900;"> // 请求报文 </span></span> StringEntity entity = new StringEntity(jsonStr, "UTF-8"); post.setEntity(entity); post.setParams(httpParameters); HttpResponse response = null; try { response = hc.execute(post); } catch (UnknownHostException e) { throw new Exception("Unable to access " + e.getLocalizedMessage()); } catch (SocketException e) { e.printStackTrace(); } int sCode = response.getStatusLine().getStatusCode(); if (sCode == HttpStatus.SC_OK) { return EntityUtils.toString(response.getEntity()); } else throw new Exception("StatusCode is " + sCode); } private static HttpClient client = null; /** * 初始化HttpClient对象 * @param params * @return */ public static synchronized HttpClient initHttpClient(HttpParams params) { if(client == null){ try { KeyStore trustStore = KeyStore.getInstance(KeyStore.getDefaultType()); trustStore.load(null, null); SSLSocketFactory sf = new SSLSocketFactoryImp(trustStore); //允许所有主机的验证 sf.setHostnameVerifier(SSLSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER); HttpProtocolParams.setVersion(params, HttpVersion.HTTP_1_1); HttpProtocolParams.setContentCharset(params, HTTP.UTF_8); // 设置http和https支持 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) { e.printStackTrace(); return new DefaultHttpClient(params); } } return client; } public static class SSLSocketFactoryImp extends SSLSocketFactory { final SSLContext sslContext = SSLContext.getInstance("TLS"); public SSLSocketFactoryImp(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(); } }</span>
run下，小手发抖的点到测试按钮，深吸口气，咦？没反应。。。马蛋的，工作线程忘记start()，唉，再次run下，终于的有点反应了，神奇的竟然没有报之前的 javax.net.ssl.SSLPeerUnverifiedException: No peer certificate 的异常了。服务端的数据正常返回了。
分析问题：
HTTPS:超文本安全传输协议，和HTTP相比，多了一个SSL/TSL的认证过程，端口为443。
1.peer终端发送一个request，https服务端把支持的加密算法等以证书的形式返回一个身份信息（包含ca颁发机构和加密公钥等）。
2.获取证书之后，验证证书合法性。
3.随机产生一个密钥，并以证书当中的公钥加密。
4.request https服务端，把用公钥加密过的密钥传送给https服务端。
5.https服务端用自己的密钥解密，获取随机值。
6.之后双方传送数据都用此密钥加密后通信。
HTTPS流程清楚后，问题也就明显了，验证证书时，无法验证。
上面提供的解决方案就是添加默认信任全部证书。以此来通过接下来的通信。
但是，这样问题是解决了。但是觉得还是不带靠谱（信任全部证书有点危险）。继续噼噼啪啪的网上搜索一番。又找到了一种解决方案，其过程大致这样的：
1.浏览器访问https地址，保存提示的证书到本地，放到android项目中的assets目录。
2.导入证书，代码如下。
3.把证书添加为信任。
<span style="font-family:Times New Roman;font-size:14px;">public static String requestHTTPSPage(Context context, String mUrl) { InputStream ins = null; String result = ""; try { ins = context.getAssets().open("my.key"); // 下载的证书放到项目中的assets目录中 CertificateFactory cerFactory = CertificateFactory.getInstance("X.509"); Certificate cer = cerFactory.generateCertificate(ins); KeyStore keyStore = KeyStore.getInstance("PKCS12", "BC"); keyStore.load(null, null); keyStore.setCertificateEntry("trust", cer); SSLSocketFactory socketFactory = new SSLSocketFactory(keyStore); Scheme sch = new Scheme("https", socketFactory, 443); HttpClient mHttpClient = new DefaultHttpClient(); mHttpClient.getConnectionManager().getSchemeRegistry().register(sch); BufferedReader reader = null; try { HttpGet request = new HttpGet(); request.setURI(new URI(mUrl)); HttpResponse response = mHttpClient.execute(request); if (response.getStatusLine().getStatusCode() != 200) { request.abort(); return result; } reader = new BufferedReader(new InputStreamReader(response .getEntity().getContent())); StringBuffer buffer = new StringBuffer(); String line = null; while ((line = reader.readLine()) != null) { buffer.append(line); } result = buffer.toString(); } catch (Exception e) { e.printStackTrace(); } finally { if (reader != null) { reader.close(); } } } catch (Exception e) { e.printStackTrace(); } finally { try { if (ins != null) ins.close(); } catch (IOException e) { e.printStackTrace(); } } return result; </span>
