默认发POST格式

Content-Type: application/x-www-form-urlencoded

Content-Type: application/x-www-form-urlencoded

bankCode:"TEST"&bankAreaCode="440305"

发JSON格式

Content-Type: application/json; charset=utf-8

Content-Type: application/json; charset=utf-8

{"bankCode":"TEST","bankAreaCode":"440305"}

HTTP头Content-Type类型记录

原文：https://www.cnblogs.com/mysticbinary/p/12675113.html