What do you understand by MultipartResolver?

1.	What do you understand by MultipartResolver?
Answer» The MultipartResolver is used for handling the file upload scenarios in the Spring web application. There are 2 CONCRETE implementations of this in Spring, they are: CommonsMultipartResolver meant for Jakarta Commons FileUpload StandardServletMultipartResolver meant for for SERVLET 3.0 Part API To implement this, we need to create a bean with id=“multipartResolver” in the application context of DispatcherServlet. Doing this ensures that all the requests handled by the DispatcherServlet have this resolver applied whenever a multipart request is detected. If a multipart request is detected by the DispatcherServlet, it resolves the request by means of the already configured MultipartResolver, and the request is passed on as a wrapped/abstract HttpServletRequest. Controllers then cast this request as the MultipartHttpServletRequest interface to get access to the Multipart files. The following DIAGRAM illustrates the FLOW clearly:

Answer»

The MultipartResolver is used for handling the file upload scenarios in the Spring web application. There are 2 CONCRETE implementations of this in Spring, they are:

CommonsMultipartResolver meant for Jakarta Commons FileUpload
StandardServletMultipartResolver meant for for SERVLET 3.0 Part API

To implement this, we need to create a bean with id=“multipartResolver” in the application context of DispatcherServlet. Doing this ensures that all the requests handled by the DispatcherServlet have this resolver applied whenever a multipart request is detected. If a multipart request is detected by the DispatcherServlet, it resolves the request by means of the already configured MultipartResolver, and the request is passed on as a wrapped/abstract HttpServletRequest. Controllers then cast this request as the MultipartHttpServletRequest interface to get access to the Multipart files. The following DIAGRAM illustrates the FLOW clearly:

What do you understand by MultipartResolver?

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