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Struts

html:options values getting appended

Sivaraman Lakshmanan

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Posts: 231

posted 18 years ago

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Hi all,
I just wrote a very simple struts example where I am populating a combo box with some values. I use <html

ptions> for populating this. First I populate just 4 values, the page loads fine but when i refresh the page I see 8 values (ie the 4 values added twice) in the html combo box.
I have reset the session values etc still I am facing the same problem.
Some struts expert please help...
I am posting my code below...

// index.jsp
 
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<html:html>
<body>
<a href="welcome.do?method=welcome">Welcome !!!</a>
</body>
</html:html>
-------------------------------------------------------------------
//Welcome.jsp
<%@ taglib uri="/WEB-INF/struts-html.tld" prefix="html" %>
<%@ taglib uri="/WEB-INF/struts-bean.tld" prefix="bean" %>
 
<html:html>
<body>
<html:form action="/welcome.do?method=welcome" type="struts.forms.WelcomeForm">
<html:text property="name"/>
            <bean :mrgreen: efine id="lstplace" name="WelcomeForm" property="place"/>
            <html:select property="selectedPlace">
                <html :-o	 ptions name="lstplace"/>
            </html:select>

<html:submit/>
</html:form>
</body>
</html:html>
-------------------------------------------------------------------
 
//struts-config.xml
<?xml version="1.0"?>
<!DOCTYPE struts-config PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 1.1//EN" "http://jakarta.apache.org/struts/dtds/struts-config_1_1.dtd">
<struts-config>
  <form-beans>

    <form-bean name="welcome" type="struts.forms.WelcomeForm"/>
  </form-beans>
 
  <action-mappings>
  <action path="/welcome"
            type="struts.action.WelcomeAction"
            parameter="method"
            name="welcome">
            <forward name="success" path="/Welcome.jsp"/>
            <forward name="failure" path="/index.jsp"/>
        </action>
  </action-mappings>
 
</struts-config>
-------------------------------------------------------------------
//WelcomeForm.java
package struts.forms;
 
import java.util.ArrayList;
import java.util.List;
 
import javax.servlet.http.HttpServletRequest;
 
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionMapping;
 
public class WelcomeForm extends ActionForm {

private static final long serialVersionUID = 1L;

String name = null;
String selectedPlace = null;
ArrayList place = null;

/**
 * @return Returns the name.
 */
public String getName() {
return name;
}
/**
 * @param name The name to set.
 */
public void setName(String name) {
this.name = name;
}
/**
 * @return Returns the place.
 */
public List getPlace() {
return place;
}
/**
 * @param place The place to set.
 */
public void setPlace(ArrayList place) {
this.place = place;
}
/**
 * @return Returns the selectedPlace.
 */
public String getSelectedPlace() {
return selectedPlace;
}
/**
 * @param selectedPlace The selectedPlace to set.
 */
public void setSelectedPlace(String selectedPlace) {
this.selectedPlace = selectedPlace;
}
 
public void reset(ActionMapping mapping, HttpServletRequest request) {
name = null;
selectedPlace = null;
place = null;
super.reset( mapping, request );
}
}
--------------------------------------------------------------------
//WelcomeAction.java
 
package struts.action;
 
import java.util.ArrayList;
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
import org.apache.struts.actions.DispatchAction;
 
import struts.forms.WelcomeForm;

public class WelcomeAction extends DispatchAction {

public ActionForward welcome(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response) throws Exception {
request.getSession(false).setAttribute("WelcomeForm",null);;
WelcomeForm wform = (WelcomeForm)form;
ArrayList list= new ArrayList();
list.add("Chennai");
list.add("Madurai");
list.add("Thriunalveli");
list.add("Tiruchy");
wform.setPlace(list);
request.getSession(false).setAttribute("WelcomeForm",wform);
return mapping.findForward("success");
}
}

Thanks in Advance

Regards,
Sivaraman.L

Soumya Saha

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Posts: 64

posted 18 years ago

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Hi Sivaraman,
Try this out ..in JSP.

<bean

efine id="lstplace" name="WelcomeForm" property="place"/>
<html:select property="selectedPlace">
<html

ptions collection="lstplace" property="key" labelProperty="value"/>
</html:select>

Thanks

Sivaraman Lakshmanan

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Posts: 231

posted 18 years ago

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Hi,
Thanks for your reply. I put the code that u gave in my JSP but its throwing a error when I run the page. The error is

javax.servlet.ServletException: No getter method available for property key for bean under name lstplace

help me to get rid of this error

Regards,
Sivaraman.L

Soumya Saha

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Posts: 64

posted 18 years ago

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Hi Sivaraman,
Sorry for that..
u can do it either way..

1.Have a bean class ..like struts label value bean..with 2 attributes(Key and Value)...set ur dropdown values in the key and value attributes of the Bean and then add the bean in the arraylist.(u should have a new instance of the Bean every time while adding to the arrayList..hope u got my point..).Then that code should work..

2.Or else ..U can use a HashMap(lstPlace) and set the values like...HmMap.put("Chennai", "Chennai");..and set it in the Request Scope and acces it from the JSP ..Then u don't need to define any bean id..

Please get back incase of errors...

Thanks

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