<Realm className="org.apache.catalina.realm.JDBCRealm"
     digest="MD5"
     connectionName="tomcat"
     connectionPassword="badpassword"
     connectionURL="jdbc:mysql://localhost/tomcatbook"
     driverName="org.gjt.mm.mysql.Driver"
     userTable="user"
     userNameCol="login"
     userCredCol="password"
     userRoleTable="role"
     roleNameCol="name"
/>
