前言

• application/x-www-form-urlencoded
• multipart/form-data
• application/json

http請求

http請求由三部分組成，分別是：請求行、消息報頭、請求正文。

POST /api/sample/form/post1 HTTP/ (CRLF) Accept:*/*(CRLF) ... HOST:192.168.0.55:8085 (CRLF) Content-Length:22 (CRLF) Connection:Keep-Alive (CRLF) Cache-Control:no-cache (CRLF) (CRLF) //該CRLF表示消息報頭已經結束，在此之前為消息報頭 user=jeffrey&pwd=1234 //此行以下為提交的數據

curl的表述形式：

curl -X POST "http://192.168.0.55:8085/api/sample/form/post1" -H "Content-Type: application/x-www-form-urlencoded" -d "pwd=123&user=jeffrey"

HTTP請求的Content-Type

HTTP請求的Content-Type作用于請求正文部分。Content-Type的默認值為application/x-www-form-urlencoded。

HTTP請求的Content-Type取值：

• application/x-www-form-urlencoded
• multipart/form-data
• application/json
• …

application/x-www-form-urlencoded

curl -X POST "http://192.168.0.55:8085/api/sample/form/post1" -H "Content-Type: application/x-www-form-urlencoded" -d "pwd=123&user=jeffrey"

multipart/form-data

curl的表述形式：

curl -X POST "http://192.168.0.55:8085/api/common/upload/file" -H "accept: */*" -H "Content-Type: multipart/form-data" -F "file=@2.jpg;type=image/jpeg"

application/json

curl -X POST "http://192.168.0.55:8085/api/sample/form/post3" -H "accept: application/json" -H "Content-Type: application/json" -d "{ \"mobile\": \"13012341234\", \"password\": \"123456\"}"

參考

區分 application/x-www-form-urlencoded、multipart/form-data

https://www.cnblogs.com/coce/p/9720285.html
https://www.cnblogs.com/wuyun-blog/p/7724495.html
https://blog.csdn.net/zsensei/article/details/80043764
https://blog.csdn.net/Andrewniu/article/details/81533905
https://blog.csdn.net/Andy2019/article/details/100112550

ajax 的 processData 參數

https://blog.csdn.net/u012235103/article/details/89552453
https://blog.csdn.net/weixin_34191845/article/details/88012221

https://www.cnblogs.com/tu-0718/p/8370925.html
https://www.cnblogs.com/yangguoe/p/8986108.html
https://www.cnblogs.com/mahuan2/p/6008832.html
https://stackoverflow.com/questions/12893566/passing-multiple-variables-in-requestbody-to-a-spring-mvc-controller-using-ajax
https://github.com/chujianyun/Spring-MultiRequestBody
https://blog.csdn.net/w605283073/article/details/82119284
https://stackoverflow.com/questions/37922973/spring-mvc-file-upload-unable-to-process-parts-as-no-multi-part-configuration
https://blog.csdn.net/qq_34608620/article/details/80635139
https://blog.csdn.net/qq_36798969/article/details/104692248

總結

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