1. response

import lombok.Data;

@Data

public class Response<T> {

    private Integer status;

    private T data;

    private Response(Integer status, T data) {

        this.status = status;

        this.data = data;

    }

    public static <T> Response<T> createResponse(Integer status, T data) {

        return new Response<>(status, data);

    }

}

2.config

import java.util.HashMap;

import java.util.List;

import com.sunginfo.assets.model.Response;

import org.springframework.context.annotation.Configuration;

import org.springframework.core.MethodParameter;

import org.springframework.http.MediaType;

import org.springframework.http.converter.HttpMessageConverter;

import org.springframework.http.converter.json.MappingJackson2HttpMessageConverter;

import org.springframework.http.server.ServerHttpRequest;

import org.springframework.http.server.ServerHttpResponse;

import org.springframework.web.bind.annotation.RestControllerAdvice;

import org.springframework.web.servlet.config.annotation.WebMvcConfigurationSupport;

import org.springframework.web.servlet.mvc.method.annotation.ResponseBodyAdvice;

@Configuration

public class GlobalReturnConfig {

    @RestControllerAdvice

    static class ResultResponseAdvice implements ResponseBodyAdvice<Object> {

        @Override

        public boolean supports(MethodParameter returnType, Class<? extends HttpMessageConverter<?>> converterType) {

            return true;

        }

        @Override

        public Object beforeBodyWrite(Object body, MethodParameter returnType, MediaType selectedContentType,

                Class<? extends HttpMessageConverter<?>> selectedConverterType, ServerHttpRequest request,

                ServerHttpResponse response) {

            if (body instanceof HashMap) {

                HashMap<?, ?> map = (HashMap<?, ?>) body;

                return Response.createResponse((int) map.get("status"),

                        String.format("%s %s", map.get("error"), map.get("path")));

            }

            return Response.createResponse(200, body);

        }

    }

    @Configuration

    public class WebConfig extends WebMvcConfigurationSupport {

        @Override

        public void configureMessageConverters(List<HttpMessageConverter<?>> converters) {

            super.configureMessageConverters(converters);

            converters.add(0, new MappingJackson2HttpMessageConverter());

        }

    }

}

3.controller

@CrossOrigin("*")

@RestController

public class AccountController {

    @GetMapping("/api/v1/accounts")

    public List<Account> getAllAccounts() {

        return accountRepository.findAll();

    }

    @GetMapping("/api/v1/accounts/test1")

    public ResponseEntity<String> getTest1() {

        return ResponseEntity.ok("account");

    }

    @GetMapping("/api/v1/accounts/test2")

    public ResponseEntity<Integer> getTest2() {

        return ResponseEntity.ok(2);

    }

}