welcome.jsp
----------------------------------------------------------

String userId = (String)session.getAttribute("user");
Welcome <%=userId%>
<br/>
a href="/usersListAction.do" class="menu"> users list
-->
-----------------------------------------------------------
This file forwards the request to /userListAction which takes a parameter as 'usersList'.
-----------------------------------------------------------
struts-config.xml file
-----------------------------------------------------------
?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
  data-sources
  data-sources
  form-beans
    form-bean name="userBean" type="com.als.skilleval.web.form.UserForm"
  /form-beans
  global-exceptions
  /global-exceptions
  global-forwards
    forward name="welcome" path="/pages/Welcome.jsp" redirect="true"
  /global-forwards>
  action-mappings
    action path="/logonAction" name="userBean" type="com.als.skilleval.web.action.UserAction" validate="false" parameter="logon"
      forward name="success" redirect="true" path="/pages/jsp/welcome.jsp"/
      forward name="failure" redirect="true" path="/index.jsp"/
    /action
    action path="/usersListAction" name="userBean" type="com.als.skilleval.web.action.UserAction" validate="false" parameter="usersList"
      forward name="success" redirect="true" path="/pages/jsp/showUsers.jsp"/
    /action
  /action-mappings
  controller/
/struts-config
-->
-----------------------------------------------------------
the user beans in package com.als.skilleval.business.user
-----------------------------------------------------------

File: User.java
-----------------------------------------------------------
package com.als.skilleval.business.user;

import java.io.Serializable;
import java.util.ArrayList;

/**
 * @author Als
 *
 */
public class User extends Person implements Serializable {

private String userId;
private String password;
private String highestQualification;
private String skill;

/**
* @return Returns the highestQualification.
*/
public String getHighestQualification() {
return highestQualification;
}

/**
* @param highestQualification The highestQualification to set.
*/
public void setHighestQualification(String highestQualification) {
this.highestQualification = highestQualification;
}

/**
* @return Returns the password.
*/
public String getPassword() {
return password;
}

/**
* @param password The password to set.
*/
public void setPassword(String password) {
this.password = password;
}

/**
* @return Returns the skill.
*/
public String getSkill() {
return skill;
}

/**
* @param skill The skill to set.
*/
public void setSkill(String skill) {
this.skill = skill;
}

/**
* @return Returns the userId.
*/
public String getUserId() {
return userId;
}

/**
* @param userId The userId to set.
*/
public void setUserId(String userId) {
this.userId = userId;
}
}
-----------------------------------------------------------
UserHelper.java
-----------------------------------------------------------
package com.als.skilleval.business.user;

import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;

import com.als.skilleval.connectivity.DBConnectionManager;

/**
 * @author Als
 *
 */
public class UserHelper {

private UserHelper(){

}

private static UserHelper c_Instance;

static{
c_Instance = new UserHelper();
}

public static UserHelper getInstance(){
return c_Instance;
}

public ArrayList usersLogonList(){

ArrayList usersList = new ArrayList();
try{
PreparedStatement pstmt =
DBConnectionManager.getInstance()
.getConnection()
.prepareStatement("SELECT USERID, PASSWORD FROM user_info");
ResultSet rs = pstmt.executeQuery();

while(rs.next()){
User user = new User();
user.setUserId(rs.getString(1));
user.setPassword(rs.getString(2));
usersList.add(user);
}

} catch(SQLException ex){
ex.printStackTrace();
}

return usersList;
}
}
-----------------------------------------------------------
File: UserClient.java
-----------------------------------------------------------
package com.als.skilleval.business.user;

import java.util.ArrayList;

/**
 * @author Als
 *
 */
public class UserClient {

private UserClient(){

}

private static UserClient c_Instance;

static{
c_Instance = new UserClient();
}

public static UserClient getInstance(){
return c_Instance;
}

public ArrayList getUsersLogonList(){
return UserHelper.getInstance().usersLogonList();
}

public User getUser(String aUserId, String aPassword){
return UserHelper.getInstance().getUser(aUserId,aPassword);
}
}
-----------------------------------------------------------
files in package com.als.skilleval.web are:
-----------------------------------------------------------
File: UserAction.java
-----------------------------------------------------------
package com.als.skilleval.web.action;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Iterator;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

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 com.als.skilleval.business.user.User;
import com.als.skilleval.business.user.UserClient;
import com.als.skilleval.web.form.UserForm;

/**
 * @author Als
 *
 */
public class UserAction extends Action {

/*
* (non-Javadoc)
*
* @see org.apache.struts.action.Action#execute(org.apache.struts.action.ActionMapping,
* org.apache.struts.action.ActionForm,
* javax.servlet.http.HttpServletRequest,
* javax.servlet.http.HttpServletResponse)
*/
public ActionForward execute(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
// TODO Auto-generated method stub
ActionForward forward = null;

String param = mapping.getParameter();
if (param.intern() == "usersList") {
forward = executeUsersList(mapping, form, request, response);
} else if (param.intern() == "logon") {
UserForm userform = (UserForm) form;
String userId = userform.getUserId();
String password = userform.getPassword();
if(userId != null && password != null){
forward = executeLogon(mapping,form,request,response,userId,password);
}
}
return forward;
}

private ActionForward executeUsersList(ActionMapping mapping,
ActionForm form, HttpServletRequest request,
HttpServletResponse response) throws IOException, ServletException {
Iterator userIter = UserClient.getInstance().getUsersLogonList().iterator();
int size = UserClient.getInstance().getUsersLogonList().size();
User [] arrUser = new User[size];
String [] usersId = new String[size];
Integer userSz = new Integer(size);
int count = 0;
while(userIter.hasNext()){
User user = (User)userIter.next();
usersId[count] = (user.getUserId());
count++;
}
HttpSession session = request.getSession();
session.setAttribute("USERS_LIST", usersId);
session.setAttribute("sz", userSz);
return mapping.findForward("success");
}

private ActionForward executeLogon(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response,
String aUserId, String aPassword) throws IOException,
ServletException {
HttpSession session = request.getSession();

Iterator iter = UserClient.getInstance().getUsersLogonList().iterator();
boolean flag = false;
while(iter.hasNext()){
User user = (User)iter.next();
if(user.getUserId().equals(aUserId) && user.getPassword().equals(aPassword)){
flag = true;
break;
}
}

if(flag == true){
session.setAttribute("user", aUserId);
return mapping.findForward("success");
}
else{
return mapping.findForward("failure");
}
}
}
-----------------------------------------------------------
File : UserForm.java
package com.als.skilleval.web.form;

import java.util.ArrayList;

/**
 * @author Als
 *
 */
public class UserForm extends ActionForm {
private String userId;
private String password;
private String highestQualification;
private String skill;
/**
* @return Returns the highestQualification.
*/
public String getHighestQualification() {
return highestQualification;
}

/**
* @param highestQualification The highestQualification to set.
*/
public void setHighestQualification(String highestQualification) {
this.highestQualification = highestQualification;
}

/**
* @return Returns the password.
*/
public String getPassword() {
return password;
}

/**
* @param password The password to set.
*/
public void setPassword(String password) {
this.password = password;
}

/**
* @return Returns the skill.
*/
public String getSkill() {
return skill;
}

/**
* @param skill The skill to set.
*/
public void setSkill(String skill) {
this.skill = skill;
}

/**
* @return Returns the userId.
*/
public String getUserId() {
return userId;
}

/**
* @param userId The userId to set.
*/
public void setUserId(String userId) {
this.userId = userId;
}

}

-----------------------------------------------------------

In my UserAction.java file, I've a function called 'executeUsersList()' which is responsible for fetching userIds from database and displaying them on a page named showUsers.jsp. I want to display them in a <html:select> tag. How will I do that can somebody help me?

regards--
uamr

first, add the struts html ctl to your jsp using the taglib entry at the begining of the file. Then, where you want to insert the select box add
<code>
<html:select property="userId" >
  <html:optionsCollection name="USERS_LIST" label="userId" value="userId"/>
</html:select>
</code>

On doing so, the following exception occurs

Cannot find bean under name org.apache.struts.taglib.html.BEAN

Did you add the struts-html.tld file to your WEB-INF directory? Did you add an entry for it in your web.xml file?