当前系统中可以通过如下脚本实现
re = '{"errcode":0,"errmsg":"ok","access_token":"T_DiOftjAVWXEagpulGB3pURcvQxRxsC6ic1o8nwj9HWzZGfqmCcf4gNrPnWkDM0CSvi9KWR6PyEt912n5LHoQPOw8-FCwZzxnec5Io0s6r-cNccZkuqd8TFPLbhJeF0xRK5DKYReLAbLAxzC4uG4ApZZwWG26XkZtnyYexV760ZeHHfh3JkYCJCVnIPbRBpwPBCx9VT1-iwLx-_XkFRyA","expires_in":7200}' a = parseExpr(re).eval()
然后通过类似a['errcode']这样的方式访问。