title: How to get job parameter by Groovy Script in post build
body: <p>My project is a work-flow control system, and the Jenkins is responsible for build phase.
  After building successfully, Jenkins would trigger another servlet to do following work and pass a job parameter(processSN) to the servlet.</p>
  
  <p>I set a parameter(processSN) as I trigger this job by its token.
  And hope to pass the parameter to servlet as building successfully.</p>
  
  <p>The example I find, always show the "default" parameter but what I expect is the input parameter as I trigger the job
  <a href="https://wiki.jenkins-ci.org/display/JENKINS/Display+job+parameters" rel="nofollow">https://wiki.jenkins-ci.org/display/JENKINS/Display+job+parameters</a></p>
  
  <p><strong>How could I get the input parameter(processSN) by groovy script in post build phase ?</strong></p>