使用

// 同步返回Optional<T>
var repos = RetrofitUtils.execute(service.listRepos("octocat")).orElse(new ArrayList<>());
// 异步
RetrofitUtils.execute(service.listRepos("octocat"), repos -> {
  //业务逻辑
});

Gist

	package com.jiangtj.utils;

	import lombok.extern.slf4j.Slf4j;
	import retrofit2.Call;
	import retrofit2.Callback;
	import retrofit2.Response;

	import java.io.IOException;
	import java.util.Optional;
	import java.util.function.Consumer;

	/**
	* Created by MrTT (jiang.taojie@foxmail.com)
	* 2019/9/5.
	*/
	@Slf4j
	public class RetrofitUtils {

	public static <T> Optional<T> execute(Call<T> call) {
	T object = null;
	try {
	Response<T> response = call.execute();
	if (response.isSuccessful()) {
	object = response.body();
	} else {
	log.error("RetrofitUtils execute fail code:{} errorBody:{}", response.code(), response.errorBody().string());
	}
	} catch (IOException e) {
	log.error("RetrofitUtils IOException:", e);
	}
	return Optional.ofNullable(object);
	}

	public static <T> void execute(Call<T> call, Consumer<T> success) {
	execute(call, success, throwable -> log.error("RetrofitUtils onFailure:", throwable));
	}

	public static <T> void execute(Call<T> call, Consumer<T> success, Consumer<Throwable> fail) {
	call.enqueue(new Callback<T>() {
	@Override
	public void onResponse(Call<T> call, Response<T> response) {
	if (response.isSuccessful()) {
	success.accept(response.body());
	} else {
	try {
	log.error("RetrofitUtils execute fail code:{} errorBody:{}", response.code(), response.errorBody().string());
	} catch (IOException e) {
	log.error("RetrofitUtils IOException:", e);
	}
	}
	}
	@Override
	public void onFailure(Call<T> call, Throwable throwable) {
	fail.accept(throwable);
	}
	});
	}

	}

view raw RetrofitUtils.java hosted with ❤ by GitHub

如果无法查看，可到知乎查看：https://zhuanlan.zhihu.com/p/81420563
需要安装lombok依赖，或者修改日志方法（log）