Note that what I want is not get specified parameter in a sevlet, but to get the parameter from a String like that:
res_data=%3C%3Fxml+version%3D%221.0%22+encoding%3D%22utf8%22%3F%3E%3Cdirect_trade_create_res%3E%3Crequest_token%3E201502051324ee4d4baf14d30e3510808c08ee1d%3C%2Frequest_token%3E%3C%2Fdirect_trade_create_res%3E&service=alipay.wap.trade.create.direct&sec_id=MD5&partner=2088611853232587&req_id=20121212344553&v=2.0
It's a url encoded utf-8 string, when decode this by python I can get the real data it represents:
res_data=<?xml version="1.0" encoding="utf-8"?><direct_trade_create_res><request_token>201502051324ee4d4baf14d30e3510808c08ee1d</request_token></direct_trade_create_res>&service=alipay.wap.trade.create.direct&sec_id=MD5&partner=2088611853232587&req_id=20121212344553&v=2.0
I want to get the parameter res_data that I care about, more specifically, I just want the request_token in the xml of res_data
I know I can use regex to get this work, but is there a more suitable way to use some lib like appache url lib or something else that I can get the res_data parameter more elegantly?
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