How can I customize the Content-Type of a response in Spring MVC using @ResponseBody?

Customizing Response Content-Type in Spring MVC with @ResponseBody

In Spring MVC, the @ResponseBody annotation automatically adds the Content-Type header to the HTTP response. However, the default Content-Type is "application/json". To customize the Content-Type for a specific method, you can use the produces attribute of the @RequestMapping annotation.

For example, if you want to return a plain text response with UTF-8 encoding, you can use the following controller method:

@RequestMapping(value = "/gethelp", method = RequestMethod.GET,
        produces = "text/plain; charset=UTF-8")
public @ResponseBody String handleGetHelp() {
    return "Some help text";
}

In this example, the produces attribute specifies that the gethelp method will produce a plain text response with UTF-8 encoding.

Note: Make sure the StringHttpMessageConverter is registered as a message converter in your Spring configuration. This can be done by adding the following bean:

<bean class="org.springframework.http.converter.StringHttpMessageConverter">
    <property name="supportedMediaTypes" value="text/plain; charset=UTF-8" />
</bean>

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