Struts File Upload and Save
We are receiving lots of comments regarding "Struts file
upload example". It does not contain any code illustrating how to
save the file on the server . Now, the current example will provide you
with the code to upload the file ,in the upload directory of server.
In this tutorial you will learn how to use Struts program to
upload on the Server and display a link to the user to download
the uploaded file . The interface org.apache.struts.upload.FormFile
has a prime role in uploading a file in
a Struts 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
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 (StrutsUploadAndSaveForm.java):
package roseindia.net;
import org.apache.struts.action.*;
import org.apache.struts.upload.FormFile;
/**
* @author Amit Gupta
* @Web http://www.roseindia.net
* @Email struts@roseindia.net
*/
/**
* Form bean for Struts File Upload.
*
*/
public class StrutsUploadAndSaveForm 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
In our previous article entitled "Struts File
Upload Example", we just had action class simply calling the getTheFile()
function on the FormBean object to retrieve the reference of the uploaded
file. Then the reference of the FormFile was used to get the uploaded file and
its information. Now further we retrieve the Servers upload directory's
real path using
ServletContext's getRealPath() and saving the file.
Code of StrutsUploadAndSaveAction.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;
import java.io.*;
/**
* @author Amit Gupta
* @Web http://www.roseindia.net
* @Email struts@roseindia.net
*/
/**
* Struts File Upload Action Form.
*
*/
public class StrutsUploadAndSaveAction extends Action
{
public ActionForward execute(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response) throws Exception{
StrutsUploadAndSaveForm myForm = (StrutsUploadAndSaveForm)form;
// Process the FormFile
FormFile myFile = myForm.getTheFile();
String contentType = myFile.getContentType();
//Get the file name
String fileName = myFile.getFileName();
//int fileSize = myFile.getFileSize();
byte[] fileData = myFile.getFileData();
//Get the servers upload directory real path name
String filePath = getServlet().getServletContext().getRealPath("/") +"upload";
/* Save file on the server */
if(!fileName.equals("")){
System.out.println("Server path:" +filePath);
//Create file
File fileToCreate = new File(filePath, fileName);
//If file does not exists create file
if(!fileToCreate.exists()){
FileOutputStream fileOutStream = new FileOutputStream(fileToCreate);
fileOutStream.write(myFile.getFileData());
fileOutStream.flush();
fileOutStream.close();
}
}
//Set file name to the request object
request.setAttribute("fileName",fileName);
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="FileUploadAndSave"
type="roseindia.net.StrutsUploadAndSaveForm"/> |
Defining Action Mapping
Add the following action mapping entry in the struts-config.xml
file:
<action
path="/FileUploadAndSave"
type="roseindia.net.StrutsUploadAndSaveAction"
name="FileUploadAndSave"
scope="request"
validate="true"
input="/pages/FileUploadAndSave.jsp">
<forward name="success" path="/pages/downloaduploadedfile.jsp"/>
</action>
|
Developing jsp pages
Code of the jsp (FileUploadAndSave.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 and Save Example</title>
<html:base/>
</head>
<body bgcolor="white">
<html:form action="/FileUploadAndSave" method="post" enctype="multipart/form-data">
<table>
<tr>
<td align="center" colspan="2">
<font size="4">File Upload on Server</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>
|
code for the success page (downloaduploadedfile.jsp)
is:
<html>
<head>
<title>Success</title>
</head>
<body>
<%
String fileName=(String)request.getAttribute("fileName");
%>
<p align="center"><font size="5" color="#000080">File Successfully Received</font></p>
<p align="center"><a href="upload/<%=fileName%>">Click here to download</a></p>
</body>
</html>
|
Add the following line in the index.jsp to call the
form.
<li>
<html:link page="/pages/FileUploadAndSave.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 Struts File
Upload page.
Your browser should display the file upload form:
Now , Browse the file needed to upload and click Upload
File Button. Browser will display that file has successfully
received on the server.
Click on the hyperlink to see the uploaded content. .
|
Del.icio.us
Digg
Google
Spurl
Blink
Furl
Simpy
Y! MyWeb
Current Comments
29 comments so far (post your own) View All Comments Latest 10 Comments:How I catch File not found exception?
Posted by Wut on Monday, 04.21.08 @ 09:17am | #57371
iam getting an error like this
java.lang.IllegalArgumentException: argument type mismatch
wat happened plz help
Posted by Anil on Sunday, 03.9.08 @ 18:36pm | #52117
I want to view repost from database in JSP but this report shoud be view in PDF format.
so, i need source code the example.
please as soon as possible give a example with html and jsp on the broswer.
Shyam
Posted by Shyam on Friday, 02.8.08 @ 14:13pm | #47602
iam getting exception creating bean of class plz help me
Posted by srinivas on Wednesday, 12.26.07 @ 14:19pm | #43832
Fantastic Struts example. Could someone give me the equivilant on the Java Server Faces framework. I have built the version that basically upload the file but does not save the file to a folder on the server. Could I please see the working code on this process. From upload to saving the image file on a server folder. It would be very much appreciated.
Posted by Brian Brocksmith on Tuesday, 12.18.07 @ 21:10pm | #42854
I am also getting same problem. Initially it was working absolutely, now suddenly it stop to work. I tried to rectify the problem but unable to find it.
Please help me...
Posted by Trilok on Friday, 12.14.07 @ 15:30pm | #42247
Struts File dwonload example
Posted by prasad on Monday, 12.3.07 @ 16:53pm | #41183
The use of getFileData() should be discouraged in favour of getInputStream on the FormFile object.
The reason being is in terms of memory management it is more efficient to get the file data in multiple chunks as opposed to getting the whole byte array of data in one go.
Posted by Anon on Monday, 11.5.07 @ 22:39pm | #35679
when ever i am trying to upload my file i am getting the follwing error .can any one help me how to solve it
HTTP Status 500 -
--------------------------------------------------------------------------------
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
java.io.FileNotFoundException: D:\JBoss\jboss-4.0.3SP1\server\default\.\tmp\deploy\tmp33421WebApplication-exp.war\upload\AddSpring.zip (The system cannot find the path specified)
java.io.FileOutputStream.open(Native Method)
java.io.FileOutputStream.<init>(FileOutputStream.java:179)
java.io.FileOutputStream.<init>(FileOutputStream.java:131)
com.action.StrutsUploadAndSaveAction.execute(StrutsUploadAndSaveAction.java:49)
org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:431)
org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:236)
org.apache.struts.action.ActionServlet.process(ActionServlet.java:1196)
org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:432)
javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:81)
note The full stack trace of the root cause is available in the Apache Tomcat/5.5 logs.
Posted by rose india on Friday, 10.12.07 @ 18:20pm | #33443
HI
I want to get the uploaded filepath i.e any local driver from our system.
because what iam uploadinthe file .zip file
so i want decompress the file programatically
the zip file accepting the File ,FilePath only
Plz help me
Posted by siva on Thursday, 10.4.07 @ 13:48pm | #31358