Question

我正在处理Spring in Action 5th Edition随附的示例源代码中的以下类定义：

package tacos;

import javax.persistence.Entity;
import javax.persistence.Id;

import lombok.AccessLevel;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.RequiredArgsConstructor;

@Data
@RequiredArgsConstructor
@NoArgsConstructor(access=AccessLevel.PRIVATE, force=true)
@Entity
public class Ingredient {

  @Id
  private final String id;
  private final String name;
  private final Type type;

  public static enum Type {
    WRAP, PROTEIN, VEGGIES, CHEESE, SAUCE
  }

}

尝试使用参数实例化成分时，出现以下编译错误：

reference to Ingredient is ambiguous
both constructor Ingredient(String,String,Type) in Ingredient and constructor Ingredient(String,String,Type) in Ingredient match

除了“ delomboking”类定义之外，还有什么建议吗？

附录

由于第一个建议的修复程序（尝试删除Lombok @RequiredArgsConstructor ）不起作用，因此，让我继续并共享调用代码。

这是IngredientRepository界面：

package tacos.data;

import org.springframework.data.repository.CrudRepository;

import tacos.Ingredient;

public interface IngredientRepository 
         extends CrudRepository<Ingredient, String> {

}

这是TacoCloudApplication类，该类给出了编译错误：

package tacos;

import org.springframework.boot.CommandLineRunner;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.context.annotation.Bean;

import tacos.Ingredient.Type;
import tacos.data.IngredientRepository;

@SpringBootApplication
public class TacoCloudApplication {

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

  @Bean
  public CommandLineRunner dataLoader(IngredientRepository repo) {
    return new CommandLineRunner() {
      @Override
      public void run(String... args) throws Exception {
        repo.save(new Ingredient("FLTO", "Flour Tortilla", Type.WRAP));
        repo.save(new Ingredient("COTO", "Corn Tortilla", Type.WRAP));
        repo.save(new Ingredient("GRBF", "Ground Beef", Type.PROTEIN));
        repo.save(new Ingredient("CARN", "Carnitas", Type.PROTEIN));
        repo.save(new Ingredient("TMTO", "Diced Tomatoes", Type.VEGGIES));
        repo.save(new Ingredient("LETC", "Lettuce", Type.VEGGIES));
        repo.save(new Ingredient("CHED", "Cheddar", Type.CHEESE));
        repo.save(new Ingredient("JACK", "Monterrey Jack", Type.CHEESE));
        repo.save(new Ingredient("SLSA", "Salsa", Type.SAUCE));
        repo.save(new Ingredient("SRCR", "Sour Cream", Type.SAUCE));
      }
    };
  }

}

使用Lombok RequiredArgsConstructor解决歧义问题

0 个答案: