list empty using s:select tag with Struts 2

[anna lanzaro]

I need help for a s:select tag

i have an action that execute a query that return a Collection:
In the jsp page I wrote:

 <s:action name="findstudent"  executeResult="true">
<s:select label="Students" list="{Students}"  listKey="Student"  listValue="{id_student}" headerValue="Select Student" headerKey="0"></s:select>
</s:action>

This is the code of my action:

 private Collection<Student> students;

public void setStudents(Collection<Student> students) {
	this.students = students;
}
public Collection<Student> getStudents() {
	return students;
}

//the action
public void showStudents() throws Exception {
	
	students=service.getStudent();//this execute query and return a collection
	setClassi(classi);
	System.out.println(classi.size());//this show the number of rows in the table student ant it is ok

}
  

Students in implemented as below:

@Entity
@IdClass(StudentPK.class)
public class Student {
	public Student() {
	
	}
	
@Id
@Column(name="id_student")
protected String id_student;

@Id
protected Integer year;

    

In the list I want see the Id_student of all my students.
when I execute my application there are no errors but my list is empty?What I can do?
Please help me!!!
thank you!

[Rodrigo Bossini]

The list element should not be within {}. Also, the S in Students has to be in lower case so Struts can call the getters and setters properly.

[anna lanzaro]

Rodrigo Bossini wrote:The list element should not be within {}. Also, the S in Students has to be in lower case so Struts can call the getters and setters properly.

if the list element is within {} I see this error

tag 'select', field 'list': The requested list key 'students' could not be resolved as a collection/array/map/enumeration/iterator type. Example: people or people.{name} - [unknown location]

[anna lanzaro]

Please!!!
HELP ME!!!

[Ankit Garg]

Did you actually try what Rodrigo said?? In the s:select tag, list="{Students}" should be list="students"...

[galne vaibhav]

what you have to do is just get the value data from database put in hashmap or list and show on jsp in list attribute as mention below

JSP code:

<tr>
  <td class="req"><s:text name="label.busCode"/></td>
  <td class="valueTD">
    <s:select label="BussCode" name="cmbBussCode"  headerKey="1" headerValue="--- Select ---"  list="objBussCode"/>
  </td>
</tr>

where objBussCode is my hashmap name

Edited by Dave to be legible.

[anna lanzaro]

I solved my problem!!
The problem was in the query not in the select tag!
Thanks