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Java?? ResultSet? ?? ??
? ??? ??? MySQL ???? Java ResultSet? ?? ????? ???? ?????? ????? ?? ???? ??? ??????

Java ResultSet? ?? ????? ???? ?????? ????? ?? ???? ??? ??????

Jan 01, 2025 pm 12:27 PM

How to Efficiently Iterate Through a Java ResultSet and Extract Values from a Database Table?

Java?? ResultSet? ?? ??

Java?? ?? ??? ??? ?? ?? ????? ???? ?? ?????. ? ??? dbo.Locate ????? ?? ???? ResultSet? ???? ???? ?? ?? ????.

dbo.Locate ????? ?? ????? ??? ?????.

String query = "SELECT rlink_id, COUNT(*)"
             + "FROM dbo.Locate  "
             + "GROUP BY rlink_id ";

??? ???? ResultSet? ?????. ?? ??? ???? ?? ????? ?? ??? ??? ? ????.

List<String> sids = new ArrayList<String>();
List<String> lids = new ArrayList<String>();

Statement stmt = yourconnection.createStatement();
try {
    ResultSet rs4 = stmt.executeQuery(query);

    while (rs4.next()) {
        sids.add(rs4.getString(1));
        lids.add(rs4.getString(2));
    }
} finally {
    stmt.close();
}

? ??? rlink_id ? COUNT(*) ?? ?? ???? ?? ? ?? ??(sid ?lids)? ?????. , ??. while ??? ?? ??? ???? ? rlink_id ? COUNT(*) ?? ?? ??? ?????.

????? ??? ?? toArray() ???? ???? ??? ??? ? ????.

String show[] = sids.toArray(sids.size());
String actuate[] = lids.toArray(lids.size());

??? ??? ??? Java?? ResultSet? ????? ???? ??? ?? ??? ? ????.

? ??? Java ResultSet? ?? ????? ???? ?????? ????? ?? ???? ??? ??????? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!

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