application.properties

service.info.name=Restful API Service
service.info.version=1.0.1

logging.level.org.springframework.boot=DEBUG
logging.level.org.springframework.web=DEBUG

DefaultErrorController.java

package com.sk.planet.web.support;

import java.util.Locale;
import java.util.Map;
import java.util.Objects;

import javax.servlet.http.HttpServletRequest;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.web.ErrorAttributes;
import org.springframework.boot.autoconfigure.web.ErrorController;
import org.springframework.context.MessageSource;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.context.request.RequestAttributes;
import org.springframework.web.context.request.ServletRequestAttributes;

@RestController
public class DefaultErrorController implements ErrorController {
	
	private String errorPath;
	private ErrorAttributes errorAttributes;
	private MessageSource messageSource;
	
	@RequestMapping(value = "${error.path:/error}")
	public ResponseEntity<Map<String, Object>> error(HttpServletRequest request, Locale locale) {
		RequestAttributes requestAttributes = new ServletRequestAttributes(request);
		Map<String, Object> body = errorAttributes.getErrorAttributes(requestAttributes, true);
		
		HttpStatus status = HttpStatus.INTERNAL_SERVER_ERROR;
		if(Objects.nonNull(body.get("status"))) {
			try {
				status = HttpStatus.valueOf((Integer) body.get("status"));
			} catch(Exception ignore) { } 
		}
		
		String message = messageSource.getMessage("error." + status, null, status.getReasonPhrase(), locale);
		if(StringUtils.hasText(message)) {
			body.put("message", message);
		}
		
		return ResponseEntity.status(status).body(body);
	}		

	@Override 
	public String getErrorPath() {
		return errorPath;
	}
	
	@Value("${error.path:/error}")
	public void setErrorPath(String errorPath) {
		this.errorPath = errorPath;
	}

	@Autowired
	public void setErrorAttributes(ErrorAttributes errorAttributes) {
		this.errorAttributes = errorAttributes;
	}
	
	@Autowired
	public void setMessageSource(MessageSource messageSource) {
		this.messageSource = messageSource;
	}	

}

messages_ko_KR.properties

error.404=요청한 자원을 찾을 수 없습니다.
error.500=요청을 처리하는 중 서버내에서 알 수 없는 오류가 발생했습니다.

ServiceInfoController.java

package com.sk.planet.web;

import java.util.HashMap;
import java.util.Map;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
@ConfigurationProperties("service.info")
public class ServiceInfoController {
	
	private String name;
	private String version;
	
	@RequestMapping("/info")
	public Map<String, String> info() {
		Map<String, String> model = new HashMap<>();
		model.put("name", name);
		model.put("version", version);
		
		return model;
	}

	
	public void setName(String name) {
		this.name = name;
	}

	public void setVersion(String version) {
		this.version = version;
	}

}