keytool 使用：生成证书并导入JDK

  711  keytool -genkey -alias tomcat -keyalg RSA -keystore keystore
  712  keytool -genkey -alias tomcat -keyalg RSA -keystore keystore/tomcat.keystore
  715  keytool -export -file tomcat.crt -alias tomcat -keystore tomat.keystore
  716  keytool -export -file tomcat.crt -alias tomcat -keystore tomcat.keystore
  720  keytool -import -keystore cacerts -file /root/keystore/tomcat.crt -alias tomcat
  724  keytool -import -keystore /root/jdk1.8.0_131/jre/lib/security/cacerts -file tomcat.crt -alias tomcat
  725  keytool -genkey -alias tomcat -keyalg RSA -keystore tomcat.keystore
  730  keytool -genkey -alias tomcat -keyalg RSA -keystore tomcat.keystore
  731  keytool -export -file tomcat.crt -alias tomcat -keystore tomcat.keystore
  732  keytool -import -keystore /root/jdk1.8.0_131/jre/lib/security/cacerts -file tomcat.crt -alias tomcat
  740  keytool -import -keystore /root/jdk1.8.0_131/jre/lib/security/cacerts -file tomcat.crt -alias tomcat
  746  keytool -import -keystore /root/jdk1.8.0_131/jre/lib/security/cacerts -file tomcat.crt -alias tomcat
  768  keytool -genkey -alias tomcat -keyalg RSA -keystore tomcat.keystore
  769  keytool -export -file tomcat.crt -alias tomcat -keystore tomcat.keystore
  770  keytool -import -keystore /root/jdk1.8.0_131/jre/lib/security/cacerts -file tomcat.crt -alias tomcat
  772  keytool -import -keystore /root/jdk1.8.0_131/jre/lib/security/cacerts -file tomcat.crt -alias tomcat