content type multipart mixed

The Enctype property of the form represents how the page form data is encoded when it is transmitted to the server, and is commonly used in two ways: application/x-www-form-urlencoded and Multipart/form-data, which are application/by default.

The HTTP protocol has a detailed description of the MIME type, multipart/.... is a single message header that contains multiple message body solutions. Multipart media types are useful for sending non-text media types. These subtype are commonly

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Network Working Group L. MasinterRequest for Comments: 2388 Xerox CorporationCategory: Standards Track August 1998 Returning Values

Http://docs.spring.io/spring/docs/current/spring-framework-reference/html/mvc.html#mvc-multipart1. IntroductionSpring's built-in multipart support handles file uploads in Web apps. You can enable this support--through pluggable multipartresolver

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The enctype attribute of form is encoded in two ways: Application/X-WWW-form-urlencoded and multipart/form-data, the default value is application/X-WWW-form-urlencoded. When the action is get, the browser uses the X-WWW-form-urlencoded encoding

I. Using httpclient to send forms based on content-type= "Multipart/form-data"

The Enctype property of the form is encoded and is commonly used in two ways: application/x-www-form-urlencoded and Multipart/form-data, and the default is application/ X-www-form-urlencoded.When the action is get, the browser converts the form data