在struts2 中的action中 无法转换泛型对象的类型。

Question

代码如下

接口action

public interface GenericTypeController<T,ID> {

    public String save();

   .........................
}

抽象类action

public class AbstractGenericTypeController<T,ID> extends ActionSupport implements GenericTypeController<T,ID>  {

 private Class<T> entityClass ;
  public AbstractGenericTypeController() {

        entityClass = GenericTypeResolverUtil.resolverTypeArgument(getClass(),GenericTypeController.class);

    }

 public String save() {
            sessionFactory.getCurrentSession().save(entityClass);

            //save时出现了org.hibernate.MappingException: Unknown entity: java.lang.Class 错误
    }
}
实现类

public class AirPlaneController extends AbstractGenericTypeController<Airplane,Long>{
 private  Airplane airplane;

              

Answer 1

不明白

Answer 2

谢谢，那么类似与List<T>的怎么办？

Answer 3

这是我以前写的，可以参考下

public AbstractGenericTypeController() {
        Type c = (((ParameterizedType) getClass().getGenericSuperclass()).getActualTypeArguments()[0]);
        if (c instanceof ParameterizedType) {
            entityClass = (Class<T>) ((ParameterizedType) c).getRawType();
        }
        else {
            entityClass = (Class<T>) c;
        }
    }