How to Properly Configure Spring MVC for Multiple Content Types in a Single Controller?
I'm stuck trying to After trying multiple solutions online, I still can't figure this out... I'm working on a Spring MVC application (version 5.3.10) and I've encountered an scenario when trying to configure a single controller method to handle requests for both JSON and XML content types. I want to return different representations based on the `Accept` header provided by the client, but it seems to always default to JSON even when I specify `application/xml`. Here’s my current controller method: ```java @GetMapping(value = "/items", produces = {MediaType.APPLICATION_JSON_VALUE, MediaType.APPLICATION_XML_VALUE}) public ResponseEntity<List<Item>> getItems() { List<Item> items = itemService.findAll(); return ResponseEntity.ok(items); } ``` I've tried adding the following to my application configuration: ```java @Bean public MappingJackson2XmlHttpMessageConverter xmlMessageConverter() { return new MappingJackson2XmlHttpMessageConverter(); } ``` Additionally, I have the following configuration in my `application.properties` file: ``` spring.mvc.contentnegotiation.strategies=favorPathExtension,favorParameter spring.mvc.contentnegotiation.parameterName=mediaType ``` However, regardless of whether I set the `Accept` header to `application/xml` or `application/json`, it always returns a JSON response. I've debugged the request headers and confirmed that the header is passed correctly by the client. What am I missing in my configuration? Are there any additional settings I should consider to ensure that my controller can handle multiple content types properly? Thanks in advance for any help! This is part of a larger web app I'm building. Am I missing something obvious? I'm coming from a different tech stack and learning Java. Any ideas how to fix this?