String select = "select itemid from " + ITEMS + " where itemid>91592607 ";
            String update = "update " + ITEMS + " set view=? where itemid=?";
            int[] iids = new int[5];
            try {
                pstmt = conn.prepareStatement(select);
                pstmt2 = conn.prepareStatement(update);
                rs = pstmt.executeQuery();//报错行at GetUserData.main(GetUserData.java:52)
                rs.setFetchSize(1000);