Pretty print JSON output of Spring Boot Actuator endpoints

Question

Spring Boot Actuator provides several endpoints to monitor an application as:

/metrics
/b         


        

Answer 1

Unfortunately, the application property

spring.jackson.serialization.INDENT_OUTPUT

did not work for me (spring boot versions 1.2.6 to 1.4.0.RELEASE). Instead, in my extension of WebMvcConfigurerAdapter, I've overridden configureMessageConverters() and added my own Jackson2ObjectMapperBuilder:

@Configuration
@EnableWebMvc
public class WebMvcConfig extends WebMvcConfigurerAdapter {
   ...
    private MappingJackson2HttpMessageConverter jacksonMessageConverter() {
        Jackson2ObjectMapperBuilder builder = new Jackson2ObjectMapperBuilder()
                .featuresToDisable(SerializationFeature.FAIL_ON_EMPTY_BEANS,
                        SerializationFeature.WRITE_CHAR_ARRAYS_AS_JSON_ARRAYS)
                .featuresToEnable(SerializationFeature.INDENT_OUTPUT).modulesToInstall(hibernate4Module());
        // can use this instead of featuresToEnable(...)
        builder.indentOutput(true);
        return new MappingJackson2HttpMessageConverter(builder.build());
    }


    @Override
    public void configureMessageConverters(List> converters) {
        converters.add(jacksonMessageConverter());
        super.configureMessageConverters(converters);
    }

   ...

}

That seem to do the trick for me on Spring boot 1.4.0.RELEASE and my actuator output is now pretty printed (along with every other json output)