如何在Jenkins Groovy脚本中执行HTTP POST请求？

也许我缺少了一些东西，但是为什么不只使用jenkins类路径中已经存在的标准Java库呢？

import java.io.BufferedReaderimport java.io.InputStreamReaderimport java.io.OutputStreamWriterimport java.net.URLimport java.net.URLConnectiondef sendPostRequest(urlString, paramString) {    def url = new URL(urlString)    def conn = url.openConnection()    conn.setDoOutput(true)    def writer = new OutputStreamWriter(conn.getOutputStream())    writer.write(paramString)    writer.flush()    String line    def reader = new BufferedReader(new     InputStreamReader(conn.getInputStream()))    while ((line = reader.readLine()) != null) {      println line    }    writer.close()    reader.close()}sendPostRequest("http://www.something.com", "param1=abc&param2=def")