package com.seecoder.BlueWhale.serviceImpl; import java.util.List; import java.util.stream.Collectors; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.stereotype.Service; import com.seecoder.BlueWhale.po.Order; import com.seecoder.BlueWhale.repository.OrderRepository; import com.seecoder.BlueWhale.service.CommentService; @Service public class CommentServiceImpl implements CommentService{ @Autowired OrderRepository orderRepository; @Override public List findComments(Integer productId) { List orders = orderRepository.findByProductId(productId); return orders.stream().map(Order::getContent).collect(Collectors.toList()); } }