Java，遍历结果集

Question

在 Java 中，我有这样的查询:

String querystring1= "SELECT rlink_id, COUNT(*)"
                   + "FROM dbo.Locate  "
                   + "GROUP BY rlink_id ";

rlink_id 表有这个数据:

Sid        lid
 3           2
 4           4
 7           3
 9           1

如何使用 Java ResultSet 提取这些值？

这是我目前所拥有的:

String show[] = {rs4.getString(1)};
String actuate[] = {rs4.getString(2)};
asString = Arrays.toString(actuate);

Answer 1

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

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

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();
}

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