{ "username": "老李", "content": "大家好!" }
curl --location --request POST 'https://hmajax.itheima.net/api/addcmt' \ --header 'Content-Type: application/json' \ --data-raw '{ "username": "老李", "content": "大家好!" }'
{ "status": 201, "msg": "发表评论成功" }