package tacos.web;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.SessionAttributes;
import java.lang.reflect.Field;
import lombok.extern.slf4j.Slf4j;
import tacos.Ingredient;
import tacos.Ingredient.Type;
import tacos.Taco;

@Slf4j
@Controller
@RequestMapping("/design")
@SessionAttributes("tacoOrder")
public class DesignTacoController {

@ModelAttribute
public void addIngredientsToModel(Model model) {
        List<Ingredient> ingredients = Arrays.asList(
          new Ingredient("FLTO", "Flour Tortilla", Type.WRAP),
          new Ingredient("COTO", "Corn Tortilla", Type.WRAP),
          new Ingredient("GRBF", "Ground Beef", Type.PROTEIN),
          new Ingredient("CARN", "Carnitas", Type.PROTEIN),
          new Ingredient("TMTO", "Diced Tomatoes", Type.VEGGIES),
          new Ingredient("LETC", "Lettuce", Type.VEGGIES),
          new Ingredient("CHED", "Cheddar", Type.CHEESE),
          new Ingredient("JACK", "Monterrey Jack", Type.CHEESE),
          new Ingredient("SLSA", "Salsa", Type.SAUCE),
          new Ingredient("SRCR", "Sour Cream", Type.SAUCE)
        );

        Type[] types = Ingredient.Type.values();
        for (Type type : types) {
          model.addAttribute(type.toString().toLowerCase(),
              filterByType(ingredients, type));
        }
}
  @GetMapping
  public String showDesignForm(Model model) {
    model.addAttribute("taco", new Taco());
    return "design";
  }

  private Iterable<Ingredient> filterByType(
      List<Ingredient> ingredients, Type type) {
    return ingredients
              .stream()
              .filter(x -> x.getType().equals(type))
              .collect(Collectors.toList());
  }

}

字符串
我正在浏览Spring in action第6版的书。在filterByType方法中，“.getType（）"显示错误

The method getType() is undefined for the type Ingredient

型
我以为这是由于lombok的错误，但我已经安装了，以及。我也导入包'java.lang.reflect.Field'，但仍然得到错误。

package tacos;

import lombok.Data;

@Data
public class Ingredient {
 public Ingredient(String string, String string2, Type wrap) {
        // TODO Auto-generated constructor stub
    }

private final String id = "";
 private final String name = "";
 private final Type type = null;
 
 public  enum Type {
     WRAP, PROTEIN, VEGGIES, CHEESE, SAUCE
 }
}

型
上面的类是一个独立的类