public class BaseAction<T> extends ActionSupport implements ModelDriven<T> {
Class<T> clazz;
T t;

	public BaseAction() {
	super();
      ParameterizedType parameterizedType =  (ParameterizedType) getClass().getGenericSuperclass();  
      Type[] types = parameterizedType.getActualTypeArguments();  
      clazz = (Class<T>) types[0];  
      try {
 		 t=clazz.newInstance();
 	} catch (InstantiationException e) {
 		e.printStackTrace();
 	} catch (IllegalAccessException e) {
 		e.printStackTrace();
 	}
}

	@SuppressWarnings("unchecked")
	@Override
	public T getModel(){
	  
	return t;
	}

}
 

注意t是建立的類，而clazz是Class<T>這是不一樣的，以後建立的action只要繼承BaseAction

就可以使用封裝好的t了

如下

public class DepartmentAction extends BaseAction<Department> {
private DepartmentService departmentService;

public DepartmentService getDepartmentService() {
	return departmentService;
}
@Resource(name="departmentServiceImpl")
public void setDepartmentService(DepartmentService departmentService) {
	this.departmentService = departmentService;
}
public String add(){
	departmentService.save(t);
	return "toList";
}
}
 

注意不要把T 和Class<T>混淆，否則會出現save(Class<?>)不是save(T t)這樣的錯誤