Question

用户保存一个包含特定成员名称列表的表。我的代码为用户更新团队没有任何问题。

我现在的问题是，如果用户从列表中删除了某个成员，该怎么办？

我的方法是：

获取此团队成员

List<User> usersOnTeam = User.getUsersWithTeam(teamName);

获取这些用户的姓名

String[] usersOnTeamArray = new String[usersOnTeam.size()];
for (int i = 0; i < usersOnTeam.size(); i++) {
    usersOnTeamArray[i] = usersOnTeam.get(i).getUsername();
}

现在怎么办？我需要一些方法来比较数组之间的差异并更新它们。

如果String[] members为空，则应从该团队的所有成员中删除该团队。

    public static String saveTeam(String teamName, String[] members) {
    //Update team for the user in the database
    Team team = getTeam(teamName);
    SessionFactory factory = HibernateUtil.GetSessionFactory();
    Session session = factory.openSession();
    Transaction tx = session.beginTransaction();

    //Check if it was removed any user
    List<User> usersOnTeam = User.getUsersWithTeam(teamName);
    String[] usersOnTeamArray = new String[usersOnTeam.size()];
    for (int i = 0; i < usersOnTeam.size(); i++) {
        usersOnTeamArray[i] = usersOnTeam.get(i).getUsername();
    }
    try {
        for(String member : members) {
            String hql = "FROM User WHERE username= :username";
            Query query = session.createQuery(hql);
            query.setParameter("username", member);
            User user = (User) query.getSingleResult();
            if (user != null) {
                //Update
                user.setTeam(team);
                session.merge(user);
            }
        }
        tx.commit();
    } catch (HibernateException e) {
        if (tx != null) tx.rollback();
        e.printStackTrace();
    } finally {
        session.close();
    }
    return "";
}

基本列表和字符串[]

0 个答案: