title: Upgrade the project from struts 1 to struts 2
body: <p>When updating the current project to struts 1 to struts 2, what is the best approach to do it? 
  For example i have below jars and some others,</p>
  
  <p>struts-core-1.3.5
  struts-el-1.3.5
  struts-extras-1.3.5
  struts-faces-1.3.5
  etc</p>
  
  <p>so when i upgrade to 2.x of same jars, how i know the current versions of dependency jars which above struts jars using because i need to upgrade them also with the struts jars know.
  Is there a tool or a best approach to upgrade the struts and to find out the versions of the dependency jars when update?</p>