Sending Stream To HttpResponse in struts2 instead of Writing response using getWriter().write(response).

Action Class which generates response:::


package com.action;

import java.io.InputStream;
import java.io.StringBufferInputStream;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.StringTokenizer;
import java.util.TreeMap;

import com.bean.AuthBean;
import com.serviceImpl.ServiceAware;
import com.utility.Utilities;

/**

 * The Class HomeAction.

 */

public class HomeAction extends Utilities{

/**
* Instantiates a new home action.
*/
public HomeAction(){
super();
logger.info("HomeAction instantiated...");
String users = "abhinav@gmail.com|" +
"bhawna@gmail.com|" +
"chikku@gmail.com|" +
"rashmi@gmail.com|" +
"vinay@gmail.com|" +
"kunal@gmail.com|" +
"rahul@gmail.com|" +
"abhishek@gmail.com|" +
"raju@gmail.com|" +
"mamu@gmail.com|" +
"dadu@gmail.com|" +
"baby@gmail.com|" +
"shikhu@gmail.com|" +
"pinku@gmail.com|" +
"sonu@gmail.com";
userList = new ArrayList<String>();
StringTokenizer st = new StringTokenizer(users, "|");

while (st.hasMoreTokens()) {
userList.add(st.nextToken().trim());
}
Collections.sort(userList);
userMap.put("a",1);
userMap.put("c",2);
userMap.put("b",4);
userMap.put("d",3);
}

/** The Constant serialVersionUID. */
private static final long serialVersionUID = 1L;

/** The user. */
private AuthBean authBean;

/** The service aware. */
private ServiceAware service;

/** The input stream. */

private InputStream inputStream;

/** The list. */
private List<String> userList;


/**
* Gets the user list.
*
* @return the user list
*/
public List<String> getUserList() {
return userList;
}

/**
* Sets the user list.
*
* @param userList the new user list
*/
public void setUserList(List<String> userList) {
this.userList = userList;
}

/**

* Gets the input stream.

*

* @return the input stream

*/

public InputStream getInputStream() {

return inputStream;

}

/**

* Sets the input stream.

*

* @param inputStream the new input stream

*/

public void setInputStream(InputStream inputStream) {

this.inputStream = inputStream;

}

/**
* Gets the service.
*
* @return the service
*/
public ServiceAware getService() {
return service;
}

/**
* Sets the service.
*
* @param service the new service
*/
public void setService(ServiceAware service) {
this.service = service;
}

/**
* Gets the auth bean.
*
* @return the auth bean
*/
public AuthBean getAuthBean() {
return authBean;
}

/**
* Sets the auth bean.
*
* @param authBean the new auth bean
*/
public void setAuthBean(AuthBean authBean) {
this.authBean = authBean;
}

/** The user map. */
private Map<Object, Object> userMap=new HashMap<Object, Object>();

/** The m. */
private TreeMap<Object, Object> m;

/**
* Gets the m.
*
* @return the m
*/
public TreeMap<Object, Object> getM() {
return m;
}

/**
* Sets the m.
*
* @param m the m
*/
public void setM(TreeMap<Object, Object> m) {
this.m = m;
}

/**
* Gets the user map.
*
* @return the user map
*/
public Map<Object, Object> getUserMap() {
return userMap;
}

/**
* Sets the user map.
*
* @param userMap the user map
*/
public void  setUserMap(Map<Object, Object> userMap) {
this.userMap = userMap;
}

/**
* Home page.
*
* @return the string
*/
public String homePage(){
return SUCCESS;
}

/**

* Gets the user profile .

*

* @return the user profile action

* @throws Exception the exception

*/

public String getUserProfileAction()throws Exception{

Map<String, Object> response=null;

String responseStr="";

String userName=getSession().get("username").toString();

response = getService().getUserMgmtService().getUserProfile(userName);

responseStr=response.get("username").toString()+"|"+response.get("firstname").toString()+"|"+response.get("lastname").toString()+"|"+response.get("emailid")+"|"+response.get("role");

getAuthBean().setResponse(responseStr);

getSession().putAll(response);

inputStream = new StringBufferInputStream(responseStr);

inputStream.close();

return SUCCESS;

}

/**
* Update user profile action.
*
* @return the string
* @throws Exception the exception
*/
public String updateUserProfileAction()throws Exception{
String response="";
response = getService().getUserMgmtService().updateUser(getAuthBean().getUserName(),
getAuthBean().getFirstName(),
getAuthBean().getLastName(),
getAuthBean().getEmailId(),
getAuthBean().getRole()
);
getAuthBean().setResponse(response);
inputStream = new StringBufferInputStream(response);
inputStream.close();
return SUCCESS;
}

/**
* Change password action.
*
* @return the string
* @throws Exception the exception
*/
public String changePasswordAction()throws Exception{
String response="";
response = getService().getUserMgmtService().changePasword(getAuthBean().getUserName(),Utilities.getPassword(getAuthBean().getNewPassword()),
Utilities.getPassword(getAuthBean().getOldPassword()));
getAuthBean().setResponse(response);
inputStream = new StringBufferInputStream(response);
inputStream.close();
return SUCCESS;
}

/**
* Creates the user action.
*
* @return the string
* @throws Exception the exception
*/
public String createUserAction()throws Exception{
String response="";
response=getService().getUserMgmtService().createNewUser(
getAuthBean().getUserName(),
getAuthBean().getFirstName(),
getAuthBean().getLastName(),
getAuthBean().getEmailId(),
getAuthBean().getRole()
);
getAuthBean().setResponse(response);
inputStream = new StringBufferInputStream(response);
inputStream.close();
return SUCCESS;
}

/**
* Sort on key.
*
* @return the string
* @throws Exception the exception
*/
public String sortOnKey()throws Exception{
m= new TreeMap<Object, Object>();
m.putAll(userMap);
return SUCCESS;
}

/**
* Sort on value.
*
* @return the string
* @throws Exception the exception
*/
public String sortOnValue()throws Exception{
m= new TreeMap<Object, Object>(new HashMapValueComparator(userMap));
m.putAll(userMap);
return SUCCESS;
}
}


/**
 * The Class HashMapValueComparator.
 */
class HashMapValueComparator implements Comparator<Object>{

/** The map. */
Map<Object, Object> map;

/**
* Instantiates a new hash map value comparator.
*
* @param m the m
*/
public HashMapValueComparator(Map<Object, Object> m){
super();
this.map = m;
}

/**
* Instantiates a new hash map value comparator.
*/
public HashMapValueComparator() {
super();
}

/* (non-Javadoc)
* @see java.util.Comparator#compare(java.lang.Object, java.lang.Object)
*/
public int compare(Object o1, Object o2) {
int retType;
Object v1=map.get(o1);
Object v2=map.get(o2);
if(v1.hashCode()>v2.hashCode()){
retType=1;
}else if(v1.hashCode()<v2.hashCode()){
retType=-1;
}else{
retType=0;
}
return retType;
}
}


###############################################################################
Struts.xml CONFIGURATION:::::::


<!DOCTYPE struts PUBLIC
"-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
"http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
<package name="userMgmt" extends="strutsSpringDemo">
<!-- USER MGMT ACTIONS AND MAPPINGS START-->
<action name="homeAction" class="com.action.HomeAction" method="homePage">
<result name="success" type="tiles">/homePage.tiles</result>
</action>
           

  <!-- getUserProfileAction sending >>>> Input stream -->

<action name="userProfile" class="com.action.HomeAction"
method="getUserProfileAction">
<result name="success" type="stream">
<param name="contentType">text/html</param>
<param name="inputName">inputStream</param>
</result>
</action>


<action name="changePassword" class="com.action.HomeAction"
method="changePasswordAction">
<result name="success" type="stream">
<param name="contentType">text/html</param>
<param name="inputName">inputStream</param>
</result>
</action>
<action name="updateProfile" class="com.action.HomeAction"
method="updateUserProfileAction">
<result name="success" type="stream">
<param name="contentType">text/html</param>
<param name="inputName">inputStream</param>
</result>
</action>
<action name="createUser" class="com.action.HomeAction" method="createUserAction">
<result name="success" type="stream">
<param name="contentType">text/html</param>
<param name="inputName">inputStream</param>
</result>
</action>
<action name="sortOnKey" class="com.action.HomeAction" method="sortOnKey">
<interceptor-ref name="defaultStack" />
<interceptor-ref name="execAndWait">
<param name="delay">50</param>
<param name="delaySleepInterval">150</param>
</interceptor-ref>
<result name="wait">jsp/waitProcess.jsp</result>
<result name="success" type="tiles">/homePage.tiles</result>
</action>
<action name="sortOnVal" class="com.action.HomeAction" method="sortOnValue">
<interceptor-ref name="defaultStack" />
<interceptor-ref name="execAndWait">
<param name="delay">50</param>
<param name="delaySleepInterval">150</param>
</interceptor-ref>
<result name="wait">jsp/waitProcess.jsp</result>
<result name="success" type="tiles">/homePage.tiles</result>
</action>
<!-- USER MGMT ACTIONS AND MAPPINGS END-->
</package>
</struts>