java - 如何利用Spring Boot原生支持更好的实现工厂模式？

Question

在 Spring boot 中实现工厂模式的最佳方式。

我有一个接口(interface)和它的多个实现。在请求期间，我需要根据输入字符串返回 bean。

我可以通过多种方式做到这一点。但是最好的方式是什么？

interface vehicle {
void drive();
string getVehicleName();
}

@Component
public class Car implements vehicle {
  private static string prop = "car";
  @Override
  string getVehicleName() { return prop;}

  @Override
  void drive() {}
}

@Component
public class Bike implements vehicle {
  private static string prop = "bike";

  @Override
  string getVehicleName() { return prop;}

  @Override
  void drive() {}
}

@Service
public class VehicleFactory {
    @Autowired
    private List<vehicle> vehicles;

    private static final HashMap<String, vehicle> requestVehicleMap = new HashMap<>();

    @PostConstruct
    public void initVehicleFactory() {
        for(vehicle vehicle : vehicles) {
            requestVehicleMap.put(vehicle.getVehicleName(), request);
        }
    }

    public static vehicle getVehicleImpl(String vehicleName) {
        return requestVehicleMap.get(vehicleName);
    }
}

这确实给了我正确的类(class)。 还有“限定符”可以用作 Implementing custom factory pattern in Spring .

但是有更好的方法吗？

Answer 1

接口(interface)和它的实现都很好，我只想单独更改工厂类，因为我已经得到了实现列表，那么为什么还要在映射中初始化它

我也会在代码中评论建议

车辆工厂

@Service
public class VehicleFactory {

    @Autowired
    private List<Vehicle> vehicles;

    public Vehicle getVehicleImpl(String vehicleName) { // You have already declared as @Service then why use static
          return vehicles.stream()
                .filter(vehicle -> vehicle.getVehicleName().equalsIgnoreCase(vehicleName)) // This will filter the Impl you needed from others
                .findFirst() 
                .orElseThrow(() -> new RuntimeException(String.format(" Invlaid Vehicle Name - %s", vehicleName))); // Incase Impl is not found it should throw an error or handle in some other ways
    }
}

所以尝试一下