Displaying Same ResultSet Twice In A JSP Page

I have a table that lists team names in my database. I'm trying to create a page with 2 dropdown boxes where each lists all the teams in the league (in other words, the data read in from the table). I got the first dropdown box to populate w/ this info. My question is about the 2nd dropdown box:
Since I already have the ResultSet from the 1st dropdown, I would think it would be a waste to make another DB-read to fill in the 2nd dropdown. However, when I tried to call ResultSet.first() it gave me the error that it was TYPE_FORWARD_ONLY. I checked the documentation for Connection and it looks like there are some overloaded methods for createStatement. However, the API documentation (see below) is pretty confusing. I'm not sure what "resultSetConcurrency" or "resultSetHoldability" I need if I just want to read the same data twice. Can someone point me in the right direction?
Statement createStatement(int resultSetType, int resultSetConcurrency)
Creates a Statement object that will generate ResultSet objects with the given type and concurrency.
Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)
Creates a Statement object that will generate ResultSet objects with the given type, concurrency, and holdability.

I am also having a very similar problem.
I am having a table having 20 fileds.some of them r to be displayed in one table
others in some other table.
for this i am using a bean which returns a resultset which is then used in jsp page
for display.But i have to call the javabean method twice which fires the query & returns the resultset.
I cannot store so many fileds with so many rows of values in list of objects also i do not want to
fire query twice.
rs.movefirst() does not work, so what should i do.

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Display the "sum(getcount)* in the jsp page??

I've this table in my database:
[ode]
phone ! model ! version ! count
123 abcd sis 1
234 asdfas sis 2
345 werwer jad 6
342 xcvxcv sis 3
678 jlkj jad 2
I want to display the the total number of count on my jsp page using jdbc connection. So, in this case the result should be 14 because the total number of count is (1+2+6+3+2). I know the SQL command as
"select sum(count) from table_name" but how to display the result on my jsp page. Please help me out. I tried but it's not happening......
in advance thanks.......

Hi,
look at my answer to your post regarding length of resultset. It is the same here.
Statement stmt = con.createStatement() ;
ResultSet rs = stmt.executeQuery("select sum(MYTABLE.id) from MYTABLE where MYTABLE.ID > 123") ;
rs.next() ;
BigDecimal bdRowCount = rs.getBigDecimal(1) ;select count or select sum return a resultset with one row. You can access this resultset like any other. The row has one field containing a number which you can access as a BigDecimal (like shown above).
It really is not that fdifficult to do. If you have done it with count you can do it with sum, avg etc. The limit is only set by the functions your database provides. You can have something like
select count(*), avg(colname1), sum(colname2),sum(colname3) from table,
which would return a resultset still containing only one row, but within that row 4 fields, each a BigDecimal.

Database query ResultSet from servlet to JSP page

          Hi there,
          I have an Access 2000 database. I am running Apache and Tomcat on Windows Me.
          I would like to know if it is possible for me to use a Servlet to search the
          database (I know this bit is possible!), but then I would like the servlet to
          forward to a jsp page which will then display the ResultSet that the servlet has
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          SJ


HttpServletRequest.setAttribute let's you share data for a particular
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          Make sure your JSP does close the result set though, because what you are
          trying to do doesn't sound good :)
          If you want to share data across the session, take a look at the HttpSession
          object.
          read through the servlet specification, it is fairly easy to read and will
          give you all the info you need
          Filip
          ~
          Namaste - I bow to the divine in you
          ~
          Filip Hanik
          Software Architect
          [email protected]
          www.filip.net
          "SJ" <[email protected]> wrote in message
          news:[email protected]...
          >
          > Hi there,
          >
          > I have an Access 2000 database. I am running Apache and Tomcat on Windows
          Me.
          > I would like to know if it is possible for me to use a Servlet to search
          the
          > database (I know this bit is possible!), but then I would like the servlet
          to
          > forward to a jsp page which will then display the ResultSet that the
          servlet has
          > retrieved, i.e. when forwarding from a servlet to a jsp, is it possible
          for the
          > jsp page to have access to the servlet's data? I know that it gets access
          to
          > the response and request objects, but what about a ResultSet?
          >
          > Sorry it this sounds a little silly - i am a bit of a newbie.
          >
          > Thanks in advance for your help,
          >
          > SJ

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Hi..
I have developed one web-page which shows ALL employee records fetched from a employee table and display them in my JSP page.
It has contain more than 1000's of records. I need to display first 10 Records in my page. There should be some 4 links below the records display which get me to see next 10 records or previous 10 records or first 10 records or Last 10 records.
IS it possible in JSP??
This is my sample code for your ref:
<jsp:useBean id="empOperation" class="com.venki.gen.EmployeeOperation" />
<html>
<head>
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</head>
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<p align="center"><u>DataAccess JSP Tag</u></p>
<%
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%>
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</table>
</body>
</html>
It would be extremely useful,if i know the technique how to display every 10 Records thru JSP.
Waiting for You people valuable reply and code!
Regards
venki

I do it by pages. i.e. http://example.com/page.jsp?page=1 would show records 1-10, ?page=2 would show records 11-20
let's pretend each record is identified by one field in the database, `id`
then the SQL query you'd use to grab the records could be..
SELECT * FROM `your_table` WHERE `id` >= (page*10) and <= (page*10+10)or this might even work:
SELECT * FROM `your_table` ORDER BY `id` ASC LIMIT (page*10),10(all examples untested as I'm at work :P)

Trying to display a result set in a jsp page

While trying to do that, i get this exception
org.apache.jasper.JasperException: An exception occurred processing JSP page /tablasUF.jsp at line 17
14:
15: Connection con = src.Connect.connectMe();
16:
17: Statement statement = con.createStatement() ;
18: ResultSet resultset =
19: statement.executeQuery("select * from UF_CUSTOMER");
20:
Stacktrace:
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:505)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:416)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
root cause
java.lang.NullPointerException
org.apache.jsp.tablasUF_jsp._jspService(tablasUF_jsp.java:68)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:374)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:337)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:266)
javax.servlet.http.HttpServlet.service(HttpServlet.java:803)

River_Plate wrote:
root cause
java.lang.NullPointerException
org.apache.jsp.tablasUF_jsp._jspService(tablasUF_jsp.java:68)Do you understand anyway when a NullPointerException would be thrown? Those kind of RuntimeExceptions are basic Java knowledge.
If an object is null while you want to access it, then a NPE would be thrown. Check the line of the cause which objects could be null and fix it accordingly.

HOWTO: Display a custom image on a jsp page

You need 4 files.
1. a jsp page (index.jsp)
2. A servlet (myPackage.ImageMaker)
3. A supplier class (myPackage.PluggableSupplier)
4. web.xml (your IDE should supply this)
From the jsp page you're calling the servlet with an <img> tag, and passing it some parameters.
The servlet obtains a BufferedImage from a pluggable supplier class, and returns with an image (png).
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================================================================================================
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
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Here's the servlet (ImageMaker.java):
package myPackage;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.*;
import javax.imageio.ImageIO;
import javax.servlet.*;
import javax.servlet.http.*;
public class ImageMaker extends HttpServlet {
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    throws ServletException, IOException {
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        response.addHeader("Pragma", "no-cache");
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        response.setContentType("image/png");
        OutputStream out = response.getOutputStream();
        //catch incoming parameters, as many or few as you want
        String parameter1 = request.getParameter("Param1");
        String parameter2 = request.getParameter("Param2");
        //fetch the buffered image
        int width = 100;
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        PluggableSupplier ps = new PluggableSupplier(width, height);
        BufferedImage buf = ps.fetchBI(parameter1);
        /***You can now draw on the original image if you want to add a watermark or label or whatever*********/
        Graphics g = buf.getGraphics();
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        g.drawString(parameter2, 5, 30);
        try {
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            ImageIO.write(buf, "png", out);
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            System.err.println("Error writing image file: " + ioe);
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
        processRequest(request, response);
}================================================================================================
This is the class that supplies your image (PluggableSupplier.java):
package myPackage;
import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
public class PluggableSupplier {
    BufferedImage buf = null;
    Graphics2D g2d = null;
    int width = 50;
    int height = 50;
    public PluggableSupplier(int w, int h) {
        if ((w+h)>2) {
            this.width = w;
            this.height = h;
        buf = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
        g2d = buf.createGraphics();
    public BufferedImage fetchBI(String parameter1) {
        if (g2d != null) {
            g2d.setColor(Color.RED);
            g2d.fillRect(0, 0, width, height);
            g2d.setColor(Color.WHITE);
            g2d.drawString(parameter1, 5, 15);
        return buf;
}================================================================================================
finally, your web.xml should look like this:
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <servlet>
        <servlet-name>ImageMaker</servlet-name>
        <servlet-class>myPackage.ImageMaker</servlet-class>
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    <servlet-mapping>
        <servlet-name>ImageMaker</servlet-name>
        <url-pattern>/ImageMaker</url-pattern>
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    <welcome-file-list>
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Another trick I learned (the hard way ;))...it's a good idea to buffer the output before responding. Add the following code to the servlet, in the case of the provided example, where all the other response-related stuff are done:
response.setBufferSize(yourBufferSize);It's a good idea to try and calculate the buffer size as accurately as possible.

Reg dynamically displaying records from database into a jsp page

I am working in a project which is using struts and hibernate.In a class I gave code for retrieving data from a table and I put it in a list.
List retrieveList;
public List getRetrieveList() {
String SQL_QUERY ="from student s";
Query query = session.createQuery(SQL_QUERY);
retrieveList = query.list();
return retrieveList;
public void setRetrieveList(List retrieveList) {
this.retrieveList = retrieveList;
And this list value I want to be displayed in a jsp page.What I have given is :
<jsp:useBean id="records" class="StudentImpl" scope="session" />
<bean:define id="list" name="records" property="retrieveList" />
<table align="center" bordercolor="black" cellpadding="10" cellspacing="10">
<logic:iterate id="data" name="list" type="pojo.student" indexId="index">
<tr>
<td><html:multibox property="checked" value=""></html:multibox></td>
<td><bean:write name="data" property="studentname" /></td>
<td><bean:write name="data" property="age" /></td>
</tr>
</logic:iterate>
</table>
When I run my jsp page its showing an error
org.apache.jasper.JasperException: [Ljava.lang.Object; cannot be cast to pojo.Student
can anyone resolve this problem?

ya i got through criteria query.
Transaction tx = session.beginTransaction();
          try{
               Criteria query = session.createCriteria(Student.class);
               list = (ArrayList)query.list();
               tx.commit();
               setRetrieveList(list);
               session.close();
          catch(Exception e){
               System.out.println(e);
          }

How to display result in more than one jsp page

Hi all,
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Thanks in Advance.

The magic word is "paging". Look around using this keyword.
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Exactly what I was looking for!
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Hope this helps.
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matt wrote:
For Welblogic Portal 7.0, I want to display a simple image (.gif) on aJSP page.
The problem is that I need to use a 'hard coded' url to the image suchas the following:
<img src="portlets/test/images/test.gif" border="0" alt="Test 1">
- OR -
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border="0" alt="Test 2">
This makes the portlet less portable.
My goal is to display an image relative to the current JSP Portlet page(in the test
directory).
Does anyone know how to accomplish this?
In WL Portal 4.0 I used:
<img src="<%=fixupRelativeURL(pathFromRequest(request) + "images/test.gif",request)%>"
width=24 height=22 border=0 alt="test">
This does not work anymore as fixupRelativeURL does not seem to existin the 7.0
API.
Your help would be greatly appreciated!
Thanks,
Matt

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um.
yuck.
I would suggest you use some JSTL.
Mixing html and scriptlet code like this is a recipe for disaster:
And whats with all this if j==1, j==2 crap?
Seeing as you only have three items being returned, it would be much simpler just to have one loop, and access vector elements 0,1,2 directly rather than having a double loop.
At LEAST pull some of the stuff into temporary variables.
<c:forEach var="episode" items="${outvec}" varStatus="status">
<c:choose>
    // first line is headings?
     <c:when test="${status.first}">
        <td align="center">${episode[0]}</td>
        <td align="center">${episode[1]}</td>
        <td align="center">${episode[2]}</td>
     </c:when>
        // all other lines print the data
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<tr>
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</tr>
</c:otherwise>
</c:forEach>You see how much clearer it is without the nested looping and complicated if syntax?
Do yourself a favour - take a step back get JSTL and rewrite it from scratch.
You will be thanking yourself later.
Cheers,
evnafets

Displaying Same ResultSet Twice In A JSP Page

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