JAVA 7和JAVA 8各自支持的Cipher Suites

java 7

http://docs.oracle.com/javase/7/docs/technotes/guides/security/SunProviders.html#SunJSSEProvider

java 8

http://docs.oracle.com/javase/8/docs/technotes/guides/security/SunProviders.html#SunJSSEProvider

修改DHE的键长：

JAVA_OPTS="$JAVA_OPTS -Djdk.tls.ephemeralDHKeySize=1024"