一、application/x-www-form-urlencoded
请求参数为 key1=val1&key2=val2 格式,中文或特殊字符如 "/"、","、“:" 等自动进行 URL 转码
content-type: application/x-www-form-urlencoded
id=888722&name=%E4%B8%AD%E6%96%87
二、multipart/form-data
multipart/form-data; boundary=--------------------------608750537356672399435737