Issue with respect to String Array in Struts

[Deepak Lal]

Hi Ranchers,
We are facing an issue as shown below.

-----------------------------------------------------------------------------------            
In jsp page ::
       <logic:iterate id="countryNameDet" name="form" property="countryNameDet">
             <tr>                
                  <td  >
                    <bean:write name="countryName" property="country_Name" />        
            </tr>
       </logic:iterate>
-------------------------------------------------------------------------------

Java code as shown below ::

           
            List countryNameDET = new ArrayList();
            countryNameDET = CountryDAO.getCountryDetails(); //access db and retrieve country Details as a list 
            form.setCountryNameDet(countryNameDET); //countryNameDET is the list set in the form     
            StringTokenizer st = null;
            CountryPOJO country = null;
            Iterator iterator = countryNameDET.iterator();         
            String[] countries = new String[3]; 
                       
            while (iterator.hasNext()) {
                  country = (CountryPOJO) iterator.next();
                  int counter=0;
                 SOP(country.getCountry_Name()); //we get period sepearated Countries (Example : Mumbai.Calcutta.Bangalore)
                  st = new StringTokenizer(country.getCountry_Name(), "."); //stringTokenizer to Tokenize Countries and retrieve individual countries                              
                  while (st.hasMoreTokens()) {
                        countries[counter] = new String(st.nextToken());
                        System.out.println("Country is -->"+countries[counter]) // display individual countries
                       counter= counter+1;
                  }                                  
 
            }
           //ACTION CLASS --> how do i need to set the String Array in Action clas and access in jsp (in Struts)
           //JSP PART --> how do i neeed to write the logic iterate tag for Displaying individual countries one below the other in jsp ???

When I tokenize the Strings I get 3 independent strings.which I need to display in the jsp page using logic:iterate one below the other how do I do that
In jsp output should be


Mumbai
Calcutta
Bangalore


Could you please help me with the code in JSP and how to set the countries in Java.(Action class)...

[Siva Masilamani]

set the String array in the request or session attribute and then use it in the jsp.

e.g. request.setAttribute("countryList",countries) in the action class

then in the jsp

  <logic:iterate id="country" name="countryList">
   <bean:write name="country"/>
</logic:iterate>  

or if you have array property int he form then set the country array inthe form property then use it in the jsp as below

  <logic:iterate id="country" name="form name,should be same as given in action mapping" property="property name that holds array">
   <bean:write name="country"/>
</logic:iterate>  

[Deepak Lal]

or if you have array property in the form then set the country array in the form property then use it in the jsp as below

  <logic:iterate id="country" name="form name,should be same as given in action mapping" property="property name that holds array">   
   <bean:write name="country"/>   
 </logic:iterate>

 

Hi Siva,
what changes do i need to make in in my form and in action class and jsp...could you help me out with that for the above code to work in jsp.

Thanks and Regards
Deepak Lal

[Siva Masilamani]

Let say this is the ActionForm

public class MyForm extends ActionForm{
private String[] countryArray;
//other fields
//write getter and setter method for the above property
}  

Then in the action class

  List countryNameDET = new ArrayList();   
            countryNameDET = CountryDAO.getCountryDetails(); //access db and retrieve country Details as a list    
            form.setCountryNameDet(countryNameDET); //countryNameDET is the list set in the form        
            StringTokenizer st = null;   
            CountryPOJO country = null;   
            Iterator iterator = countryNameDET.iterator();            
            String[] countries = new String[3];    
                          
            while (iterator.hasNext()) {   
                  country = (CountryPOJO) iterator.next();   
                  int counter=0;   
                 SOP(country.getCountry_Name()); //we get period sepearated Countries (Example : Mumbai.Calcutta.Bangalore)   
                  st = new StringTokenizer(country.getCountry_Name(), "."); //stringTokenizer to Tokenize Countries and retrieve individual countries                                 
                  while (st.hasMoreTokens()) {   
                        countries[counter] = new String(st.nextToken());   
                        System.out.println("Country is -->"+countries[counter]) // display individual countries   
                       counter= counter+1;   
                  }                                     
    
            }   
form.setCountryArray(countries); //same form where you set the countryNameDET array list
//return forward.
   

In struts-config.xml,you might have something like this

<form-beans>
   <form-bean name="myForm" type="com.myapp.MyForm" />
</form-beans>

the name in the iterate tag should match the name you defined inthe form-beans in struts-config.xml

In jsp

 <logic:iterate id="country" name="myForm" property="countryArray">   
   <bean:write name="country"/>   
</logic:iterate>    

Additionally you may add logivc:prsent tag to check if the array is not empty before using iterate tag.i.e put the logic:iterate tag inside logic:present tag.

[Deepak Lal]

Hi Siva,
Thanks for the inputs.Let me check and get back to you in case i face any issues..
Thanks and Regards
Deepak Lal