ssh，dao层登录将用户名和密码放入session，现在想获取userid怎么做

Question

dao：
@Override
public int userLogin(User user) {

    String hql = "from User where username = '" + user.getUsername()
            + "' and password = '" + user.getPassword() + "'";

    Query query = sessionFactory.getCurrentSession().createQuery(hql);

    int i = query.list().size();

    return i;
}

action：

@Action(value = "/userLogin", results = {
        @Result(name = SUCCESS, location = "/index.jsp"),
        @Result(name = ERROR, location = "/error.jsp") })
public String login() {
    if (userService.login(user)) {
        ActionContext ac = ActionContext.getContext();
        ac.getSession().put("user", user);
        System.out.println("action user:" + user.getUserid());  //输出为null
        return SUCCESS;
    }
    return ERROR;
}

Answer 1

我记得是get获取吧，参数有两个，User.Class +要获取的id