Hell Mahesh.
Thank you so much. I had the get methods already in the Iteamdetailhlp
class and I
used the for loop as you adviced. And it works. Thanks for all your help.
eve
>From: "Mahesh.Kannan" <Mahesh.Kannan_at_Sun.COM>
>Reply-To: ejb_at_glassfish.dev.java.net
>To: ejb_at_glassfish.dev.java.net
>Subject: Re: ArrayList /LinkedList with a table
>Date: Mon, 16 Apr 2007 11:42:35 -0700
>
>If Iteamdetailhlp has methods like getItemId(), getItemName() etc. (just
>like Itemdetailsent), then you can use
>
>iteamdetailhlp=iteamdetails.DisCountitems();
>for (ItemDetailHlp item : itemdetailhlp) {
> out.println("<tr>");
> out.println("<td>"); out.println(item.getItemId());
>out.println("</td>");
> out.println("<td>"); out.println(item.getItemName());
>out.println("</td>");
> ...
> out.println(</tr>");
>}
>
>OR just modify your toString() to return the values enclose within "<td>
>... "</td>
>
>I would rather use the for loop approach as using HTML tags inside
>toString() is not that elegant (particularly if you are planning to use
>this toString() from a non-servlet like client)
>
>
>
>
>Eve Pokua wrote:
>
>>Hello,
>>
>>I have successfully retrieve data from a Database to which I'm using a
>>LinkedList.
>>The data is being displayed in a servlet but I would like to display it
>>in a table with all the columns.
>>
>>The following is what I have so far.
>>
>>The romete interface defines my method as:
>>
>>java.util.List DisCountitems() throws Exception;
>>
>>
>>I have a helper class called:
>>
>>Iteamdetailhlp
>>
>>which have the toString method of how the data is displayed.
>>
>>public String toString() {
>> String s = itmid + " " + itmname +" " + description + " " +
>>colour + " , ";
>>
>> return s;
>> }
>>
>>NOw inside my implementation class, I have these two methods:
>>
>>public List<Iteamdetailhlp> DisCountitems(){
>> List<Iteamdetailsent> iteamdetailsent=null;
>>
>> try{
>>
>>iteamdetailsent=(List<Iteamdetailsent>)em.createNamedQuery("GetAlldiscountitems").getResultList();
>>
>>
>> return copyToDetails(iteamdetailsent);
>> }catch (Exception ex) {
>> throw new EJBException(ex);
>> }
>>
>>the above method contains the query to get the data.
>>
>>private List<Iteamdetailhlp> copyToDetails(List<Iteamdetailsent>
>>iteamdetailsents) {
>> List<Iteamdetailhlp> detailsList = new
>>LinkedList<Iteamdetailhlp>();
>>
>> Iterator<Iteamdetailsent> i =
>>iteamdetailsents.iterator();
>> while (i.hasNext()) {
>> Iteamdetailsent iteamdetailsent =
>>(Iteamdetailsent) i.next();
>> Iteamdetailhlp iteamdetailhlp=new
>>Iteamdetailhlp(
>>
>> iteamdetailsent.getitmid(),
>> iteamdetailsent.getitmname(),
>>
>>iteamdetailsent.getdescription(),
>> iteamdetailsent.getcolour());
>> detailsList.add(iteamdetailhlp);
>> }
>>
>> return detailsList;
>> }
>>
>>The above methods gets the data from DisCountitems() and store it into a
>>LinkedList
>>
>>the Iteamdetailsent is my entity class which has my query as:
>>
>>@NamedQuery(name = "GetAlldiscountitems",query = "SELECT i FROM
>>Iteamdetailsent i where i.Discount='yes'"),
>>
>>Basically it is retrieving all items which are on a discount.
>>
>>Now in my servlet I make a reference to the helper class as follows:
>>
>>List<Iteamdetailhlp> iteamdetailhlp;
>>iteamdetailhlp=iteamdetails.DisCountitems();
>>out.println("<td>");
>>out.println(iteamdetailhlp);
>>
>>which displays the data as:
>>
>>[5468679 iris table red , , 564646 iris spoon silver, ]
>>
>>So that is the item number, name, description and colour.
>>
>>Now I would rather that it is display as:
>>
>>ItemID Name Description Colour
>>5468679 iris table red
>>564646 iris spoon silver
>>
>>If I was retrieving the data without ArrayList or LinkedList, I would be
>>calling these as follows
>>iteamdetailsent.getitmid(),
>> iteamdetailsent.getitmname(),
>>
>>iteamdetailsent.getdescription(),
>> iteamdetailsent.getcolour());
>>
>>And I can easily put that into a table. I have search for this but not
>>got anywhere.
>>Please, can you help?
>>
>>Thanks
>>
>>eve
>>
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