一个支持泛型的DAO接口类，泛型dao接口,/** * Define

一个支持泛型的DAO接口类，泛型dao接口,/** * Define

/** * Defines a generic DAO interface. *  * @author javier *  * @param <T> *            The type this DAO handles. * @param <ID> *            The type of the id of the handled entity. */public interface DAOInterface<T, ID extends Serializable>{    /**     * Makes the given entity persistent.     *     * @param entity The entity to persist.     * @throws When the quota of instances for that entity was exceeded.     */    void makePersistent(T entity) throws QuotaExceededException;    /**     * Makes the given entity transient.     *     * @param entity The entity to make transient.     */    void makeTransient(T entity);    /**     * @return the number of matching entities.     */    int count(Filter filter);    /**     * Returns a single entity which has the given ID or throws an     * <code>EntityNotFoundException</code> if no matching entity is found.     *      * @param id     *            The ID of the entity to return.     * @return The entity.     */    T findById(ID id) throws EntityNotFoundException;    /**     * Returns all matching entities of type <code>T</code>.     *      * @param filter     *            The <code>Filter</code> to use.     *     * @return An ordered <code>List</code> with the entities.     */    List<T> find(Filter filter);    /**     * Returns all entities of type <code>T</code>.     *      * @return An ordered <code>List</code> with the entities.     */    List<T> findAll();    /**     * Returns a page of entities.     *      * @param filter     *            The <code>Filter</code> to use.     * @param startRow     *            The offset.     * @param pageSize     *            The number of entities to return.     *     * @return A <code>Pair</code> of values. The first value is the     *         <code>List</code> of entities and the second one if the total     *         number of existing entities.     */    Pair<List<T>, Integer> findPaged(Filter filter, int startRow, int pageSize);    /**     * Flushing is the process of synchronising the underlying persistent     * store with persistable state held in memory.      */    void flush();}//该片段来自于http://byrx.net