3.6、Model、ModelMap、Map的关系

Model、ModelMap、Map类型的参数其实本质上都是 BindingAwareModelMap 类型的。

public interface Model{} 
public class ModelMap extends LinkedHashMap<String, Object> {} 
public class ExtendedModelMap extends ModelMap implements Model {} 
public class BindingAwareModelMap extends ExtendedModelMap {}