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: <oapi.dingtalk.com> != <*.laiwang.com> OR <*.laiwang.com>
具体没空研究，找到下面代码解决：
private static CloseableHttpClient getHttpClient() {
RegistryBuilder<ConnectionSocketFactory> registryBuilder = RegistryBuilder.<ConnectionSocketFactory>create();
ConnectionSocketFactory plainSF = new PlainConnectionSocketFactory();
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 = new TrustStrategy() {
@Override
public boolean isTrusted(X509Certificate[] x509Certificates, String s) throws CertificateException {
return true;
}
};
SSLContext sslContext = SSLContexts.custom().useTLS().loadTrustMaterial(trustStore, anyTrustStrategy).build();
LayeredConnectionSocketFactory sslSF = new SSLConnectionSocketFactory(sslContext, SSLConnectionSocketFactory.ALLOW_ALL_HOSTNAME_VERIFIER);
registryBuilder.register("https", sslSF);
} catch (KeyStoreException e) {
throw new RuntimeException(e);
} catch (KeyManagementException e) {
throw new RuntimeException(e);
} catch (NoSuchAlgorithmException e) {
throw new RuntimeException(e);
}
Registry<ConnectionSocketFactory> registry = registryBuilder.build();
//设置连接管理器
PoolingHttpClientConnectionManager connManager = new PoolingHttpClientConnectionManager(registry);
// connManager.setDefaultConnectionConfig(connConfig);
// connManager.setDefaultSocketConfig(socketConfig);
//构建客户端
return HttpClientBuilder.create().setConnectionManager(connManager).build();
}
参考：http://blog.csdn.net/shenyunsese/article/details/41075579