将 Enum 或 String 用于静态工厂方法？

public class ShapeFactory {
    public static Shape createShape(String shapeType) {
        switch (shapeType) {
            case "CIRCLE":
                return new Circle();
            case "SQUARE":
                return new Square();
            case "RECTANGLE":
                return new Rectangle();
            default:
                throw new IllegalArgumentException("Invalid shape type");
        }
    }
}

public enum ShapeType {
    CIRCLE, SQUARE, RECTANGLE
}

public class ShapeFactory {
    public static Shape createShape(ShapeType shapeType) {
        switch (shapeType) {
            case CIRCLE:
                return new Circle();
            case SQUARE:
                return new Square();
            case RECTANGLE:
                return new Rectangle();
            default:
                throw new IllegalArgumentException("Invalid shape type");
        }
    }
}