java获取ResultSet长度Java

public class Test {
public static void main(String[] args) throws SQLException {
  Connection conn = WLMGlobal.connMgr_stat_instance().getConnection();
  Statement stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,ResultSet.CONCUR_READ_ONLY);
  ResultSet rs = stmt.executeQuery("select distinct logid from stat_data");
 
  rs.last(); //结果集指针知道最后一行数据
  int n = rs.getRow();
  System.out.println(n);
 
  rs.beforeFirst();//将结果集指针指回到开始位置，这样才能通过while获取rs中的数据
  while(rs.next()){
   System.out.println(rs.getInt(1));
  }
}
}