servlet_to_spring.groovy

class Servlet {
    String name, fqcn
    List patterns = []
    def getPatternsStr() {
        patterns.collect { /"$it"/ }.join(", ")
    }
}

def web = new XmlSlurper().parse(new File('webapp/WEB-INF/web.xml'))

def servlets = web.servlet.collectEntries { [it.'servlet-name'.text(), new Servlet(name: it.'servlet-name'.text(), fqcn: it.'servlet-class'.text())] }

web.'servlet-mapping'.each { 
    servlets[ it.'servlet-name'.text()].patterns.addAll(it.'url-pattern'.collect{it.text()}) 
}

servlets.collect { k,s ->
    """
    @Bean
    public ServletRegistrationBean get${s.name}(){
        return new ServletRegistrationBean(new ${s.fqcn}(), ${s.patternsStr});
    }    
    """
}.join("\n")