paypal - Issue Of Integration Express Checkout with java play framework -

edit: format

i trying intigration paypal express checkout in java play framework it's done in json response given paypal include approval_url :

"https://www.sandbox.paypal.com/cgi-bin/webscr?cmd\u003d_express-checkout\u0026token\u003dec-7*******...

in url include

\u003d before _express-checkout , \u0026 before token word , \u003d before token response key...

what string mean??? need url

"https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=ec-7***************"...

how can this???

thanks in advance

if doing sandbox transaction url should using express checkout:

https://www.sandbox.paypal.com/cgi-bin/webscr?cmd=_express-checkout&token=

here documentation in paypal developer site:

express checkout setting transaction

below link express checkout sample code:
paypal code wizard