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Struts File Upload Example

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In this tutorial you will learn how to use Struts to write program to upload files.

Struts File Upload Example

     

In this tutorial you will learn how to use Struts to write program to upload files. The interface org.apache.struts.upload.FormFile is the heart of the struts file upload application. This interface represents a file that has been uploaded by a client. It is the only interface or class in upload package which is typically referenced directly by a Struts application.

Creating Form Bean

Our form bean class contains only one property theFile,  which is of type org.apache.struts.upload.FormFile.

 

Here is the code of FormBean (StrutsUploadForm.java):

package roseindia.net;


import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;



/**
@author Deepak Kumar
* @Web http://www.roseindia.net
* @Email roseindia_net@yahoo.com
*/

/**
 * Form bean for Struts File Upload.
 *
*/
public class StrutsUploadForm extends ActionForm
{
  private FormFile theFile;

  /**
 @return Returns the theFile.
 */
  public FormFile getTheFile() {
  return theFile;
  }
  /**
 @param theFile The FormFile to set.
 */
  public void setTheFile(FormFile theFile) {
  this.theFile = theFile;
  }
}

Creating Action Class

Our action class simply calls the getTheFile() function on the FormBean object to retrieve the reference of the uploaded file. Then the reference of the FormFile is used to get the uploaded file and its information. Here is the code of our action class(StrutsUploadAction.java):

package roseindia.net;

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

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 org.apache.struts.upload.FormFile;
/**
@author Deepak Kumar
* @Web http://www.roseindia.net
* @Email roseindia_net@yahoo.com
*/

/**
 * Struts File Upload Action Form.
 *
*/
public class StrutsUploadAction extends Action
{
  public ActionForward execute(
  ActionMapping mapping,
  ActionForm form,
  HttpServletRequest request,
  HttpServletResponse responsethrows Exception{
  StrutsUploadForm myForm = (StrutsUploadForm)form;

  // Process the FormFile
  FormFile myFile = myForm.getTheFile();
  String contentType = myFile.getContentType();
  String fileName  = myFile.getFileName();
  int fileSize = myFile.getFileSize();
  byte[] fileData  = myFile.getFileData();
  System.out.println("contentType: " + contentType);
  System.out.println("File Name: " + fileName);
  System.out.println("File Size: " + fileSize);
  
  return mapping.findForward("success");
  }
}

Defining form Bean in struts-config.xml file

Add the following entry in the struts-config.xml file for defining the form bean:

<form-bean
  name="FileUpload"
  type="roseindia.net.StrutsUploadForm"/>

Defining Action Mapping

Add the following action mapping entry in the struts-config.xml file:

<action
   path="/FileUpload"
   type="roseindia.net.StrutsUploadAction"
   name="FileUpload"
   scope="request"
   validate="true"
   input="/pages/FileUpload.jsp">
   <forward name="success" path="/pages/uploadsuccess.jsp"/>
</action>

Developing jsp page

Code of the jsp (FileUpload.jsp) file to upload is as follows:

<%@ taglib uri="/tags/struts-bean" prefix="bean" %>
<%@ taglib uri="/tags/struts-html" prefix="html" %>

<html:html locale="true">
<head>
<title>Struts File Upload Example</title>
<html:base/>
</head>
<body bgcolor="white">
<html:form action="/FileUpload" method="post" enctype="multipart/form-data">
<table>
<tr>
<td align="center" colspan="2">
<font size="4">Please Enter the Following Details</font>
</tr>

<tr>
<td align="left" colspan="2">
<font color="red"><html:errors/></font>
</tr>



<tr>
<td align="right">
File Name
</td>
<td align="left">
<html:file property="theFile"/> 
</td>
</tr>


<tr>
<td align="center" colspan="2">
<html:submit>Upload File</html:submit>
</td>
</tr>
</table>


</html:form>
</body>
</html:html>

Note that we are setting the encrypt property of the form to enctype="multipart/form-data".

code for the success page (uploadsuccess.jsp) is:

<html>

<head>
<title>Success</title>
</head>

<body>

<p align="center"><font size="5" >File Successfully Received</font></p>

</body>

</html>

Add the following line in the index.jsp to call the form.

<li>
<html:link page="/pages/FileUpload.jsp">Struts File Upload</html:link>
<br>
Example shows you how to Upload File with Struts.
</li>

Building Example and Testing

To build and deploy the application go to Struts\strutstutorial directory and type ant on the command prompt. This will deploy the application. Open the browser and navigate to the FileUpload.jsp page. Your browser should display the file upload form:
  

     

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Posted on: February 11, 2008

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Comments
Khalil MOULAY Rchid
June 10, 2011
Upload File

good this example is very interresting
natarajan
July 7, 2011
java developer

really too good
vinay
July 7, 2011
java struts

good
advan
September 8, 2011
example code to download for struts 1.3 ?

where can I have example code to download for struts 1.3
Bhavya
February 18, 2013
Struts 2

hi , i need struts 2 code to post a msg on wall and to create a wall... can anyone help me to complete this project... thanks, bhavya
Tess
December 13, 2011
JpnyNwgnTA

Always a good job right here. Keep rollnig on through.
Gouri
June 7, 2012
How to display this uploaded file on next page

please tell me how to display this uploaded file on next page....
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