Spring Java config message convertor priority - rest

Question

I have defined two convertors like this using Spring Java config. I always get a XML response unless I specified the 'Accept=applicaiton/json' in the HTTP header. Is there a way to set the default convertor to be JSON instead of XML convertor.
#EnableWebMvc
#Configuration
#ComponentScan(basePackages = {"foo.bar"})
public class WebMvcConfig extends WebMvcConfigurerAdapter {
...
#Bean
public MappingJackson2HttpMessageConverter jsonConverter() {
MappingJackson2HttpMessageConverter jsonConverter = new MappingJackson2HttpMessageConverter();
ObjectMapper objectMapper = new ObjectMapper();
jsonConverter.setObjectMapper(objectMapper);
return jsonConverter;
}
#Bean
public MappingJackson2XmlHttpMessageConverter xmlConverter() {
MappingJackson2XmlHttpMessageConverter xmlConverter = new MappingJackson2XmlHttpMessageConverter();
return xmlConverter;
}
#Override
public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {
converters.add(jsonConverter());
converters.add(xmlConverter());
super.configureMessageConverters(converters);
}
Here is my controller.
#RequestMapping(value = "/product")
public
#ResponseBody
BSONObject getProducts(#RequestParam String ids,
#RequestParam(required = false) String types) {
List<BSONObject> products = commonDataService.getData(ids, types);
return products;
}

Answer 1

Try the following configuration, it sets up the default Content negotiation strategy(based on article here):
#Configuration
#EnableWebMvc
public class WebConfig extends WebMvcConfigurerAdapter {
#Override
public void configureContentNegotiation(ContentNegotiationConfigurer configurer) {
configurer.defaultContentType(MediaType.APPLICATION_JSON);
}
}
Another option will be to provide other ways of specifying the content format, if Accept header is not feasible, an option could be to specify an extension /myuri/sample.json which would be returned as a json.