常见应用： https其实就是建构在SSL/TLS之上的 http协议。

1) setProtocol="TLS" will enable SSLv3 and TLSv1

2) setProtocol="TLSv1.2" will enable SSLv3, TLSv1, TLSv1.1 and TLS v1.2

3) setProtocol="TLSv1.1" will enable SSLv3, TLSv1, and TLSv1.1

4) setProtocol="TLSv1" will enable SSLv3 and TLSv1

5) setProtocol="SSL" will enable SSLv3 and TLSv1

6) setProtocol="SSLv3" will enable SSLv3 and TLSv1

7) setProtocol="SSLv2" won't work

tomcat 配置

<Connector port="443" protocol="HTTP/1.1" SSLEnabled="true"

               maxThreads="150" scheme="https" secure="true"

                              clientAuth="false" sslProtocol="TLSv1.2"

  keystore="/opt/salesforce/api/tomcat/vk_key/key.jks" keystorePass="password"

 />