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Achieiving the equivelent of PHPs mysql_result command in JSP

Posted on 2004-08-10
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Last Modified: 2012-05-05
Hello,

How would I go about getting the same result as PHP's:

$query = mysql_query("SELECT * FROM RUNNINGINSTANCE WHERE UNITLINK = $param");
$instancename1 = mysql_result($query,0,"name");

would in JSP?

Thanks
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Question by:ogryn
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Accepted Solution

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TimYates earned 250 total points
ID: 11762439
Assuming you have a db connection called "connection", and param is stored in a String variable "param";

-------------------

<%@ page import="java.sql.*" %>
<%
    PreparedStatement stmt =  null ;
    ResultSet rslt = null ;
    try
    {
        PreparedStatement stmt = connection.prepareStatement( "SELECT * FROM RUNNINGINSTANCE WHERE UNITLINK = ?" ) ;
        stmt.setString( 1, param ) ;
        ResultSet rslt = stmt.executeQuery() ;
        if( rslt.next() )
        {
            String instanceName = rslt.getString( "name" ) ;
        }
    }
    catch( SQLException ex )
    {
        out.print( ex.toString() ) ;
    }
    finally
    {
        try { if( rslt != null ) rslt.close() ; } catch( SQLException ex ) {}
        try { if( stmt != null ) stmt.close() ; } catch( SQLException ex ) {}
    }
%>
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Author Comment

by:ogryn
ID: 11762553
Does the 1 in the follwing statement, equate to which row of the database you are reading from?

stmt.setString( 1, param ) ;

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LVL 35

Expert Comment

by:TimYates
ID: 11762618
No, it sets the first ? in the prepares statement :-)

rslt.next() gets the next (first in this case) row of the resultset ready, then you can read the "name" field out of it
0
 

Author Comment

by:ogryn
ID: 11762675
ahh, thanks. I'm a really newbie at Java stuff. I've been using JSTL, but I need to step it up a gear. I'll give that a go. Thanks
0
 
LVL 35

Expert Comment

by:TimYates
ID: 11762815
Hope it works :-)

http://java.sun.com/developer/qow/archive/73/index.html

Should help too :-)

Good Luck!

Tim
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