curl --location --request POST 'http://ajax-api.itheima.net/api/data' \
--data-urlencode 'username=admin' \
--data-urlencode 'password=123456'
{
"message": "提交成功,Content-Type: application/x-www-form-urlencoded",
"data": {
"username": "admin",
"password": "123456"
}
}