Spring – How to make spring boot default to application/json;charset=utf-8 instead of application/json;charset=iso-8859-1

configurationspringspring-boot

I am updating spring-boot from 1.3.6 to 2.1.3 and while before responses had content type application/json;charset=UTF-8, now I am getting a charset of iso-8859-1.

I would like to have utf 8.

My controller looks like this:

@Controller
public class MyController {
    @RequestMapping(value={"/myService/{serviceId}"}, method=RequestMethod.POST, consumes="application/json")
    public ResponseEntity<Void> handlePostServiceId(final InputStream requestInputStream,
            @PathVariable String serviceId,
            final HttpServletRequest servletRequest,) {
       <$businessLogic>
       return new ResponseEntity<>(new HttpHeaders(), HttpStatus.ACCEPTED);
}

I can get it to return utf-8 if I include produces= MediaType.APPLICATION_JSON_UTF8_VALUE in my @RequestMapping but I would like to only have to set that once, rather than for every single API.

I also tried adding 

@Override
    public void configureContentNegotiation(
         ContentNegotiationConfigurer configurer) {
         configurer.defaultContentType(MediaType.APPLICATION_JSON_UTF8_VALUE);
    }

to my WebMvcConfigurer as suggested here: https://stackoverflow.com/a/25275291/2855921 but that broke my availability api which consumes plain/text content type.

I also ensured that my request was UTF-8, so it is not just mirroring back the format I gave.

Any ideas on how I can set the charset to be UTF-8 for the entire project?

Best Answer

Add the below properties to the application.properties file:

For Spring Boot 1.x

# Charset of HTTP requests and responses. Added to the "Content-Type" 
# header if not set explicitly.
spring.http.encoding.charset=UTF-8
# Enable http encoding support.
spring.http.encoding.enabled=true
# Force the encoding to the configured charset on HTTP requests and responses.
spring.http.encoding.force=true

Source: https://docs.spring.io/spring-boot/docs/1.5.22.RELEASE/reference/html/common-application-properties.html

For Spring Boot 2.x

server.servlet.encoding.charset=UTF-8
server.servlet.encoding.force-response=true

Source: https://docs.spring.io/spring-boot/docs/current/reference/html/appendix-application-properties.html#server.servlet.encoding.charset

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