1.
public Group findByID(long groupID) {
??Session sess = HibernateUtil.getSystemSession();
??
??try {
???return (Group) sess.get(Group.class, new Long(groupID));
??} catch (HibernateException e) {
???throw new SystemException(e);
??}
?}
2.
public Group findTopGroup() {
??Session sess = HibernateUtil.getSystemSession();
??
??try {
???String hql = "from Group group where group.groupId = 100000";
???Query query = sess.createQuery(hql);
???List list = query.list();
???Group group = null;
???
???if (list.size() > 0) {
????group = (Group) list.get(0);
???}
???
???return? group;
??} catch (HibernateException e) {
???throw new SystemException(e);
??}
?}
3. 延遲加載：Hibernate.initialize(permission.getFunctionList());
4. 匿名類做參數
transTemplate.execute(new TransactionCallback() {
??????????? ?public Object doBusiness() throws Exception {
??????????? ??UserDAO userDAO = DAOFactory.createUserDAO();
??????????? ??UserSession session = new UserSession();
??????????? ??
??????????? ??//調用UserDAO的findByID方法取得原有信息newUser
??????????? ??User newUser = userDAO.findByID(user.getUserId());
??????????? ??
??????????? ??//設置newUser的userPassword值為新密碼
??????????? ??newUser.setUserPassword(user.getUserPassword());
??????????? ??
??????????? ??//調用UserSession的modifyUser方法??????????? ??
??????????? ??session.modifyUser(newUser);
??????????? ??return null;
??????????? ?}}
??????????? );