springboot-demo/src/main/java/com/example/demo/common/ApiResponse.java

package com.example.demo.common;

import java.time.Instant;

public record ApiResponse<T>(
        int code,
        String message,
        T data,
        Instant timestamp
) {
    public static <T> ApiResponse<T> ok(T data) {
        return new ApiResponse<>(0, "success", data, Instant.now());
    }

    public static <T> ApiResponse<T> ok(String message, T data) {
        return new ApiResponse<>(0, message, data, Instant.now());
    }

    public static ApiResponse<Void> fail(int code, String message) {
        return new ApiResponse<>(code, message, null, Instant.now());
    }
}