String sql = "select * from myuser";
//ʵ��������
List users = new ArrayList();
ConnDB db = new ConnDB();
ResultSet rs = db.executeQuery(sql);//��ȡ��ѯ����
try {
while(rs.next()){
UserBean userBean = new UserBean();
userBean.setUserid(rs.getInt("sid"));
userBean.setUsername(rs.getString("sname"));