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爲什麼我不能兩次,第二次我會變空白。多次使用ResultSet無法按預期工作
String sql = "select * from t_user";
Connection con = dbUtil.getCon();
Statement statement = con.createStatement();
ResultSet rs = statement.executeQuery(sql);
while (rs.next()) {
System.out.println("phoneFirst" + rs.getString("phone"));
}
while (rs.next()) {
System.out.println("phoneSecond" + rs.getString("phone"));
}
。 –