import lombok.AllArgsConstructor;
import lombok.Data;

/**
 * @author yanfeiwuji
 */
@Data
@AllArgsConstructor
public class R<T> {
  boolean success;
  String msg;
  T data;

  public static <T> R<T> OK(T data) {
    return new R<>(true, "success", data);
  }
}

package com.yfwjt.test;

import io.github.yanfeiwuji.web.packing.ObjToPacking;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.Collections;
import java.util.List;


@SpringBootApplication
@RestController
@RequestMapping
public class SpringDemoApplication {

  public static void main(String[] args) {
    SpringApplication.run(SpringDemoApplication.class, args);
  }

  @Bean
  ObjToPacking<R> objToPacking() {
    return o -> R.OK(o);
  }

  @GetMapping("/pack")
  public R<List<String>> pack() {
    return R.OK(Collections.singletonList("123"));
  }

  @GetMapping("/doPack")
  public List<String> noPdoPack() {
    return Collections.singletonList("123");
  }

  @GetMapping("/noPack")
  @NoPacking
  public List<String> noPack() {
    return Collections.singletonList("123");
  }



}