在groovy中，您可以执行约阿希姆建议在做：

In groovy, you could do what Joachim suggests by doing:

String location = "url-of-webpage-A"
boolean wasRedirected = false
String pageContent = null

while( location ) {
  new URL( location ).openConnection().with { con ->
    // We'll do redirects ourselves
    con.instanceFollowRedirects = false

    // Get the response code, and the location to jump to (in case of a redirect)
    location = con.getHeaderField( "Location" )
    if( !wasRedirected && location ) {
      wasRedirected = true
    }

    // Read the HTML and close the inputstream
    pageContent = con.inputStream.withReader { it.text }
  }
}

println "wasRedirected:$wasRedirected contentLength:${pageContent.length()}"

如果您不想被重定向，并且希望第一页的内容，你只需要做：

If you don't want to be redirected, and want the contents of the first page, you simply need to do:

String location = "url-of-webpage-A"
String pageContent = new URL( location ).openConnection().with { con ->
  // We'll do redirects ourselves
  con.instanceFollowRedirects = false

  // Get the location to jump to (in case of a redirect)
  location = con.getHeaderField( "Location" )

  // Read the HTML and close the inputstream
  con.inputStream.withReader { it.text }
}

if( location ) { 
  println "Page wanted to redirect to $location"
}
println "Content was:"
println pageContent