application/json,application/x-www-form-urlencoded,Content-Type
application/x-www-form-urlencoded常用的form表单提交方式,header中Content-Type被指定为application/x-www-form-urlencoded;以key=value&key1=value2的形式提交。实际的请求形式:POSThttp://www.aaa.comHTTP/1.1Content-Type:application/x-www