RealmBase Encryption Issue - classpath

Question

i am trying to encrypt password for server.xml using RealmBase
into Tomcat7 through below command:
java -cp bin\tomcat-juli.jar;lib\catalina.jar;lib\tomcat-util.jar; org.apache.catalina.realm.RealmBase -a SHA passwd
and I am facing below error on executing the comman:
C:\Program Files\Apache Software Foundation\Tomcat 7.0>java -cp bin\tomcat-juli.jar;lib\catalina.jar;lib\tomcat-util.jar; org.apache.catalina.realm.RealmBase -a MD5 passwd
Exception in thread "main" java.lang.NoClassDefFoundError: javax/servlet/http/HttpServletRequest
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(Unknown Source)
at java.security.SecureClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.defineClass(Unknown Source)
at java.net.URLClassLoader.access$100(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at sun.launcher.LauncherHelper.getMainMethod(Unknown Source)
at sun.launcher.LauncherHelper.checkAndLoadMain(Unknown Source)
Caused by: java.lang.ClassNotFoundException: javax.servlet.http.HttpServletRequest
at java.net.URLClassLoader$1.run(Unknown Source)
at java.net.URLClassLoader$1.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 18 more
C:\Program Files\Apache Software Foundation\Tomcat 7.0>

Answer 1

Try including servlet-api.jar as well.
java -cp bin\tomcat-juli.jar;lib\catalina.jar;lib\tomcat-util.jar;lib\servlet-api.jar org.apache.catalina.realm.RealmBase -a SHA passwd
EDIT
After trying to run this myself, there was yet another class missing. Instead of including every JAR in the classpath manually, I decided it would be easier to just include them all with lib\*. Try this...it works for me!
java -cp bin\tomcat-juli.jar;lib\* org.apache.catalina.realm.RealmBase -a SHA passwd