Failed to obtain specified collection

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posted 12 years ago

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hi

i am new to struts...
i want to populate data in drop down.
here is my code.

issueDetails.jsp

issueDetailsForm

issueDetailsAction

package com.myapp.struts;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.util.LabelValueBean;
import java.util.*;

public class issueDetailsAction extends org.apache.struts.action.Action {

private static final String SUCCESS = "success";

public ActionForward populate(ActionMapping mapping, ActionForm  form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
 
        dbInterface obj = new dbInterface();
        String query = "select custId,company from customer_mst where isactive='Y'";
        ArrayList result = new ArrayList();
        ArrayList records = new ArrayList();
        ArrayList clientList = new ArrayList();
        issueDetailsForm input = (issueDetailsForm) form;
        
        result = obj.getQueryDetails(query);

if(result != null || result.size()>0)
        {
            records = (ArrayList)result.get(1);
            String data[] = new String[records.size()];
            
            if(records != null || records.size()>0)
            {                
                for(int i=0;i<records.size();i++)
                {
                    data = (String[]) records.get(i);
                    data[0] = data[0] == null ? "" : data[0];
                    data[1] = data[1] == null ? "" : data[1];
                    clientList.add(new clientData(data[0], data[1]));
                }
                System.out.println(clientList.size());
                input.setClientList(clientList);
                request.setAttribute("clientList", clientList);
            }
            else
            {
                System.out.println("Record not found - " + query);
            }            
        }
        else
        {
          System.out.println("Record not found - " + query);
        }
       return mapping.findForward(SUCCESS);
    }
    public ActionForward execute(ActionMapping mapping, ActionForm form,
            HttpServletRequest request, HttpServletResponse response)
            throws Exception {
        
        return mapping.findForward(SUCCESS);
    }
}

clientData.java

struts-config.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts-config PUBLIC
          "-//Apache Software Foundation//DTD Struts Configuration 1.3//EN"
          "http://jakarta.apache.org/struts/dtds/struts-config_1_3.dtd">

<struts-config>
    <form-beans>
        <form-bean name="issueDetailsForm" type="com.myapp.struts.issueDetailsForm"/>
    
    </form-beans>
    
    <global-exceptions>
    
    </global-exceptions>

<global-forwards>
        <forward name="welcome"  path="/Welcome.do"/>
    </global-forwards>

<action-mappings>
        <action name="issueDetailsForm" path="/issueDetails" scope="request" type="com.myapp.struts.issueDetailsAction" validate="false">
            <forward name="success" path="/issueDetails.jsp"/>
            </action>
        <action path="/Welcome" forward="/welcomeStruts.jsp"/>
    </action-mappings>
    
    <controller processorClass="org.apache.struts.tiles.TilesRequestProcessor"/>

<message-resources parameter="com/myapp/struts/ApplicationResource"/>    
    <plug-in className="org.apache.struts.tiles.TilesPlugin" >
        <set-property property="definitions-config" value="/WEB-INF/tiles-defs.xml" />      
        <set-property property="moduleAware" value="true" />
    </plug-in>

<plug-in className="org.apache.struts.validator.ValidatorPlugIn">
        <set-property
            property="pathnames"
            value="/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml"/>
    </plug-in>
  
</struts-config>

can you suggest me solution as soon as possible..
thanks in advance..

Ankit Garg

Sheriff

Posts: 9692

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posted 12 years ago

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Hi Madhvi, welcome to javaranch.

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