public class UserDaoImpl implements UserDao{
void save(User user){
checkPrivilege()
//保存用戶
}
void checkPrivilege(){}
}
不可能所有的類裏面有去實現check方法 ,所有就有縱向繼承
public class BaseDaoImpl{
public void checkPrivilege(){}
}
public void UserDaoImpl extends BaseDaoImpl{
public void save(User user){
checkPrivilege();
}
}
public class UserDaoImpl implements UserDao{
void save(User user){
//保存用戶
}
void checkPrivilege(){}
}
UserDaoImpl--------------------------------->Proxy 代理機制
AOP相關的術語
詳解