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6.2

Taking too much time to display records from db?is it because i use vector ?

Asked by NASEEMA in Java Server Pages (JSP)

Tags: JSP

hi all,
      it took too much long time to display the records fetching from oracle DB.
      No idea where i am wrong. is it sow is because i use vector or do i have any problem in my code.?


Wating for an expert comment

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COrders pendingOrders = null;
Vector pOrders=new Vector();
 
 
 
String id="";
id=session.getAttribute("ID").toString();
 
 
//Creating instance of the Java Class
pendingOrders=new COrders();
pOrders=new Vector();
pOrders=pendingOrders.getPendingOrders(id);
 
 
  <%for (Iterator iter = pOrders.iterator(); iter.hasNext();)
          {
	       
                pendingOrders=(COrders) iter.next();
                if (pendingOrders !=null)
        	    {
   		     <td    align='center' ><font face='Arial' size="1">
                                                 <%=(pendingOrders.getOrd_no()== null? 
"":pendingOrders.getOrd_no())%></td>
	     <td   align='center' ><font face='Arial' size="1">
                           <%=(pendingOrders.getOrd_dt()== null? "":pendingOrders.getOrd_dt())%></td>
	     <td   colspan="2" align='center' ><font face='Arial' size="1">
                          <%=(pendingOrders.getOrd_rec_dt()== null? "":pendingOrders.getOrd_rec_dt())%></font></td>	     
	....etc displaying more columns like above.
 
<%}%>
 
<%}%>
 
 
<!------ Java Class --->
package com.mycompany.myclass;
import java.util.Iterator;
import java.util.Vector;
 
 
public class COrders {
	private String ord_dt="";
	private String ord_no="";
	private String ord_rec_dt="";
		 * @return
		 */
		public String getOrd_dt() 
		{
			return ord_dt;
		}
 
		/**
		 * @return
		 */
		public String getOrd_no() 
		{
			return ord_no;
		}
 
		/**
		 * @return
		 */
		public String getOrd_rec_dt() 
		{
			return ord_rec_dt;
		}
 
		
 
		
		/**
		 * @param string
		 */
		public void setOrd_dt(String string) 
		{
			ord_dt = string;
		}
 
		/**
		 * @param string
		 */
		public void setOrd_no(String string) 
		{
			ord_no = string;
		}
 
		/**
		 * @param string
		 */
		public void setOrd_rec_dt(String string) 
		{
			ord_rec_dt = string;
		}
 
	
 
	
		public Vector getPendingOrders(String id) {
			Vector vRow = new Vector();
			Vector pendingOrders=new Vector();
		  COrders pendingOrderInfo = null;
								 			
					 String sql="SELECT " 
								+"tpr_req_id ord_no, " 
								+"to_char(req_open_dt,'dd-mm-yyyy') ord_dt, "
								+"to_char(visit_date,'dd-mm-yyyy')  ord_rec_dt,"
								+" FROM  tablename "
								+" WHERE id="+id;			
				
          
					vRow = SQLManager.select(sql);
					String element;
				
					for (Iterator iter = vRow.iterator(); iter.hasNext();) {
							pendingOrderInfo = new COrders();
							element = (String)iter.next();
							pendingOrderInfo.setOrd_no((element == null ? "" : element));
							element = (String)iter.next();
							pendingOrderInfo.setOrd_dt((element == null ? "" : element));
							element = (String)iter.next();
							pendingOrderInfo.setOrd_rec_dt((element == null ? "" : element));
							pendingOrders.add(pendingOrderInfo);
							}	
					return pendingOrders;
					
				}
		
					
 
 
}
 
Keywords: Taking too much time to display record…
 
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About this solution

Zone: Java Server Pages (JSP)
Tags: JSP
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Solution Provided By: MuraliKanth
Participating Experts: 1
Solution Grade: A
 
 
 
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