What is difference between @RequestParam, @RequestBody and @RequestPart?

最新推荐文章于 2024-07-15 18:16:37 发布

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本文探讨了Spring Framework中处理不同类型的HTTP请求数据的方法，包括使用@RequestParam映射查询参数、表单数据及请求部分，利用@RequestBody绑定JSON或XML等复杂格式到请求体，以及通过@RequestPart处理multipart/form-data中的特定部分。同时介绍了HttpMessageConverter的作用及其在转换HTTP请求与响应中的应用。

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Map HTTP request header Content-Type, handle request body.

@RequestParam ← application/x-www-form-urlencoded,
@RequestBody ← application/json,
@RequestPart ← multipart/form-data,

RequestParam (Spring Framework 5.1.9.RELEASE API)

map to query parameters, form data, and parts in multipart requests.

RequestParam is likely to be used with name-value form fields
RequestBody (Spring Framework 5.1.9.RELEASE API)

bound to the body of the web request. The body of the request is passed through an HttpMessageConverter to resolve the method argument depending on the content type of the request. (e.g. JSON, XML)
RequestPart (Spring Framework 5.1.9.RELEASE API)

used to associate the part of a “multipart/form-data” request

RequestPart is likely to be used with parts containing more complex content
HttpMessageConverter (Spring Framework 5.1.9.RELEASE API)

a converter that can convert from and to HTTP requests and responses.

All Known Implementing Classes: …, AbstractJsonHttpMessageConverter, AbstractXmlHttpMessageConverter, …