Spring Web Service Tutorial

step0
 - the simplest web-app with servlets: 1 static page and 1 servlet
 - no extra libraries as a result war-file about 3.5 Kb
 - pom properties:
   - package type is 'war'
   - does not inherit parent pom
   - javax.servlet:servlet-api has scope provided since tomcat already contains this library
 - to launch example:
   - run 'mvn clean install'
   - copy 'simple.war' to tomcat folder 'webapps'
   - restart tomcat
   - http://localhost:8080/simple or http://localhost:8080/simple/hello

step1
 - the simplest web-app with servlet and spring context
 - spring context is loaded using ContextLoaderListener
 - added dependency spring-web
 - http://localhost:8080/SimpleSpring/hello

 step2
 - the simplest spring web service
 - http://localhost:8080/SimpleSpringWS/getSquare.wsdl

 step3
 - there is no 'webapp' folder
 - package type could be 'jar' instead 'war'
 - javax.servlet:servlet-api has scope 'compile' since we run app not in servlet container
 - http://localhost:18889/hithere/getSquare.wsdl
 - http://localhost:18889/hithere/hello