package com.example.demo.utils; import com.example.demo.dto.ProductDto; import com.example.demo.entity.Product; import org.springframework.beans.BeanUtils; public class AppUtils { public static ProductDto entityToDto(Product product) { ProductDto productDto = new ProductDto(); BeanUtils.copyProperties(product, productDto); return productDto; } public static Product dtoToEntity(ProductDto productDto) { Product product = new Product(); BeanUtils.copyProperties(productDto, product); return product; } }