今天研究钉钉的开放平台，结果一个demo整了半天，这帮助系统写的也很难懂。遇到两个问题：

1、首先是执行demo时报unable to find valid certification path to requested target，错误信息如下：

request url=https://oapi.dingtalk.com/gettoken?corpid=...略...&corpsecret=...略..., exception, msg=sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target

只不过经研究，按网上的方式将证书导致到信任库中也没用，于是就找了段代码直接跳过

2、但是报下面这个错：

request url=https://oapi.dingtalk.com/get_jsapi_ticket?type=jsapi&access_token=2458f4d239173a12809cc94d1915d3b7,

exception, msg=hostname in certificate didn't match: != OR

具体没空研究，找到下面代码解决：

private staticCloseableHttpClient getHttpClient() {

RegistryBuilder registryBuilder = RegistryBuilder.create();

ConnectionSocketFactory plainSF= newPlainConnectionSocketFactory();

registryBuilder.register("http", plainSF);//指定信任密钥存储对象和连接套接字工厂

try{

KeyStore trustStore=KeyStore.getInstance(KeyStore.getDefaultType());//信任任何链接

TrustStrategy anyTrustStrategy = newTrustStrategy() {

@Overridepublic boolean isTrusted(X509Certificate[] x509Certificates, String s) throwsCertificateException {return true;

}

};

SSLContext sslContext=SSLContexts.custom().useTLS().loadTrustMaterial(trustStore, anyTrustStrategy).build();

LayeredConnectionSocketFactory sslSF= newSSLConnectionSocketFactory(sslContext, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);

registryBuilder.register("https", sslSF);

}catch(KeyStoreException e) {throw newRuntimeException(e);

}catch(KeyManagementException e) {throw newRuntimeException(e);

}catch(NoSuchAlgorithmException e) {throw newRuntimeException(e);

}

Registry registry =registryBuilder.build();//设置连接管理器

PoolingHttpClientConnectionManager connManager = newPoolingHttpClientConnectionManager(registry);//connManager.setDefaultConnectionConfig(connConfig);//connManager.setDefaultSocketConfig(socketConfig);//构建客户端

returnHttpClientBuilder.create().setConnectionManager(connManager).build();

}

参考：http://blog.csdn.net/shenyunsese/article/details/41075579