生成证书：
keytool -genkey -alias ssodemo -keyalg RSA -keysize 1024 -keypass yanglei -validity 365 -keystore /home/tools/tomcat
导出证书：
keytool -export -alias ssodemo -keystore /home/tools/tomcat/yanglei.keystore -file /home/tools/tomcat/ssodemo.crt -storepass yanglei
客户端导入证书(导入到jre):
keytool -import -keystore /usr/local/jdk1.7.0_79/jre/lib/security/cacerts -file /home/tools/tomcat/ssodemo.crt -alias ssodemo
linux 查看jdk信任的证书：
keytool -list -keystore /usr/local/jdk1.7.0_79/jre/lib/security/cacerts
删除证书：
keytool -delete -trustcacerts -alias ssodemo -keystore /usr/local/jdk1.7.0_79/jre/lib/security/cacerts
