证书协商出错解决方案
server certificate change is restricted during renegotiation解决方案
System.setProperty("jdk.tls.allowUnsafeServerCertChange", "true"); System.setProperty("sun.security.ssl.allowUnsafeRenegotiation", "true"); System.setProperty("jdk.tls.client.protocols", "TLSv1,TLSv1.1,TLSv1.2");