org.nutz.service.IdEntityService类
加入以下方法，让写法更酷更简便些，这些方法也可以省去传Class<?> classOfT这步：

public Entity<T> create(boolean dropIfExists) {
		return dao().create(getEntityClass(), dropIfExists);
	}

	public boolean drop() {
		return dao().drop(getEntityClass());
	}

	public int each(Condition cnd, Each<T> callback) {
		return dao().each(getEntityClass(), cnd, callback);
	}

	public int each(Condition cnd, Pager pager, Each<T> callback) {
		return dao().each(getEntityClass(), cnd, pager, callback);
	}

	public boolean exists() {
		return dao().exists(getEntityClass());
	}

	public T fetch() {
		return dao().fetch(getEntityClass());
	}

	public int func(String funcName, String fieldName) {
		return dao().func(getEntityClass(), funcName, fieldName);
	}

	public int func(String funcName, String fieldName, Condition cnd) {
		return dao().func(getEntityClass(), funcName, fieldName, cnd);
	}

	public T getObject(ResultSet rs, FieldMatcher fm) {
		return dao().getObject(getEntityClass(), rs, fm);
	}

	public void insert(Chain chain) {
		dao().insert(getEntityClass(), chain);
	}

	public List<T> query(Condition cnd) {
		return dao().query(getEntityClass(), cnd);
	}