Struts file upload example..

package com.action;

import java.io.File;
import org.apache.commons.io.FileUtils;
import org.apache.struts2.ServletActionContext;


import com.utility.Utilities;

/**
 * The Class FileUploaderAction.
 */
public class FileUploaderAction extends Utilities{

/**
* Instantiates a new file uploader action.
*/
public FileUploaderAction() {
super();
       logger.info("FileUploaderAction instantiated..");
}

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

/** The file. */
private File userImage;

/**
* @return the userImage
*/
public File getUserImage() {
return userImage;
}

/**
* @param userImage the userImage to set
*/
public void setUserImage(File userImage) {
this.userImage = userImage;
}

/** The user image content type. */
private String userImageContentType;

/** The user image file name. */
private String userImageFileName;


/**
* Gets the user image content type.
*
* @return the userImageContentType
*/
public String getUserImageContentType() {
return userImageContentType;
}

/**
* Sets the user image content type.
*
* @param userImageContentType the userImageContentType to set
*/
public void setUserImageContentType(String userImageContentType) {
this.userImageContentType = userImageContentType;
}

/**
* Gets the user image file name.
*
* @return the userImageFileName
*/
public String getUserImageFileName() {
return userImageFileName;
}

/**
* Sets the user image file name.
*
* @param userImageFileName the userImageFileName to set
*/
public void setUserImageFileName(String userImageFileName) {
this.userImageFileName = userImageFileName;
}




/**
* Upload file.
*
* @return the string
*/
public String uploadFile(){
logger.info("uploadFile invoked..");
return SUCCESS;
}

/**
* Upload file.
*
* @return the string
* @throws Exception the exception
*/
public String uploadImageFile() throws Exception{
logger.info("uploadImageFile invoked..");
try {

String filePath = ServletActionContext.getRequest().getSession().getServletContext().getRealPath("/");
logger.info("Server path:" + filePath);
if(userImageFileName!=null && userImage!=null){
File fileToCreate=new File(filePath, this.userImageFileName);
FileUtils.copyFile(this.userImage, fileToCreate);
}
else{
addActionMessage("An empty file can not be uploaded..");
return INPUT;
}

} catch (Exception e) {
e.printStackTrace();
addActionError("Exception occured while uploading the file..");
return INPUT;
}
return SUCCESS;
}

}

#######################################

<action name="uploadFile" class="com.action.FileUploaderAction"

method="uploadFile">

<result name="success" type="tiles">/fileUpload.tiles</result>

</action>

<action name="uploadImage" class="com.action.FileUploaderAction"

method="uploadImageFile">

<interceptor-ref name="sessionCheckStack"/>

<interceptor-ref name="fileUpload">

<param name="maximumSize">2097152</param>

<param name="allowedTypes">

image/png,image/gif,image/jpeg,image/bmp

                </param>

</interceptor-ref>

<result name="input" type="tiles">/fileUpload.tiles</result>

<result name="success" type="tiles">/fileUploadSuccess.tiles</result>

</action>