Delete #inst and #uuid literals in clojure

I have a UUID and java util date which get literals as #uuid and #inst, how do I specify the uuid or date without referencing the literals themselves? clj-json does not like dealing with them and ends up throwing an error when I try generate-string

{:timestamp (java.util.Date.)}
;{:timestamp #inst "2013-05-17T13:45:24.095-00:00"}

;but as a string the date changes format
{:timestamp (str (java.util.Date.))}
{:timestamp "Fri May 17 09:45:44 EDT 2013"}

(json/generate-string {:uuid (java.util.UUID/randomUUID)})
;#uuid "d66cf77f-13b6-4291-95cd-c2bb40aa36b3"

java.lang.Exception: Cannot generate d66cf77f-13b6-4291-95cd-c2bb40aa36b3
JsonExt.java:96 clj_json.JsonExt$Generator.generate
JsonExt.java:83 clj_json.JsonExt$Generator.generate
JsonExt.java:103 clj_json.JsonExt.generate
core.clj:18 clj-json.core/generate-to-writer
core.clj:26 clj-json.core/generate-string
NO_SOURCE_FILE:32 myapp.handler/eval8390

Not sure, but it looks like what you need:

user=> (str (java.util.UUID/randomUUID))
"91d7fcc5-d24d-4e33-a111-6ba69d14eb6a"

For date you need to choose right format. I.e.:

user=> (import java.text.SimpleDateFormat)
java.text.SimpleDateFormat
user=> (.format (SimpleDateFormat. "yyyy/MM/dd HH:mm:ss") (java.util.Date.))
"2013/05/17 16:49:58"