parse the json response with field name containing slash '/'

This is primarily a groovy question. There are actually a couple of ways you can handle this.

The simplest change is just to quote your fields, so change your line below to this:

def bName =jsonResponse.meta."data/library".bookName

It looks weird, but you need quotes because / is a valid character for identifiers in groovy, but not in java.

Here is the documentation for this feature.

http://groovy-lang.org/syntax.html#_quoted_identifiers

The documentation for the JsonSlurper class says that the parseText method returns maps and lists, so you could optionally use the native syntax for those classes like jsonResponse["/data/library"]["bookName"] but then you are using quotes anyway.

Jack