Вот код для вас:
def tokens = 'Content-Type: application/json Postman-Token: a47537e5-b4b0-4915-93c8-92acf4b21e70 cache-control: no-cache'.minus(":").replaceAll(":", "") .split(" ")
def map2 = [ : ]
def i = 0
0.step(tokens.length, 2) {
map2.put(tokens[i], tokens[i+1])
i = i + 2
}
println JsonOutput.toJson(map2)
Результат:
{"Content-Type":"application/json","Postman-Token":"a47537e5-b4b0-4915-93c8-92acf4b21e70","cache-control":"no-cache"}