How do you bind path, query, header, and body values in Spring MVC?

Maps each part of the HTTP request to explicit controller arguments and distinguishes conversion, model binding, and body conversion.

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I use @PathVariable for a value embedded in the route, @RequestParam for query or form parameters, @RequestHeader for headers, and @RequestBody for a body converted by an HttpMessageConverter. Simple values are converted to the declared Java type, while a JSON body is deserialized into one object. Required flags, defaults, or Optional express absence deliberately. A request has one consumable body, so I model related JSON fields in one request DTO.

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Correct use of request annotations, optionality, type conversion, single-body constraints, and boundary clarity.

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The annotation should express where a value comes from and whether absence is valid.
I use @PathVariable for a value embedded in the route, @RequestParam for query or form parameters, @RequestHeader for headers, and @RequestBody for a body converted by an HttpMessageConverter. Simple values are converted to the declared Java type, while a JSON body is deserialized into one object. Required flags, defaults, or Optional express absence deliberately. A request has one consumable body, so I model related JSON fields in one request DTO.
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Using @RequestBody for several independent arguments.
Treating conversion and validation as one failure.
Passing Servlet request objects through the service layer.

How do you bind path, query, header, and body values in Spring MVC?

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