File Upload in struts 2

package org.arpit.javaPostsForLearning;
import java.io.File;
import java.io.IOException;

import javax.servlet.http.HttpServletRequest;

import org.apache.commons.io.FileUtils;
import org.apache.struts2.interceptor.ServletRequestAware;

import com.opensymphony.xwork2.ActionSupport;

public class FileUploadAction extends ActionSupport implements ServletRequestAware {

    private File toBeUploaded;
    private String toBeUploadedFileName;
    private String toBeUploadedContentType;
    private HttpServletRequest servletRequest;
    public String execute()
    {
         String filePath = servletRequest.getSession().getServletContext().getRealPath("/");
         File fileToCreate = new File(filePath, this.toBeUploadedFileName);

         try {
            FileUtils.copyFile(this.toBeUploaded, fileToCreate);
        } catch (IOException e) {
            addActionError(e.getMessage());
        }
        return SUCCESS;
    }
    public File getToBeUploaded() {
        return toBeUploaded;
    }
    public void setToBeUploaded(File toBeUploaded) {
        this.toBeUploaded = toBeUploaded;
    }
    public String getToBeUploadedFileName() {
        return toBeUploadedFileName;
    }
    public void setToBeUploadedFileName(String toBeUploadedFileName) {
        this.toBeUploadedFileName = toBeUploadedFileName;
    }
    public String getToBeUploadedContentType() {
        return toBeUploadedContentType;
    }
    public void setToBeUploadedContentType(
            String toBeUploadedFileNameContentType) {
        this.toBeUploadedContentType = toBeUploadedFileNameContentType;
    }
    @Override
    public void setServletRequest(HttpServletRequest servletRequest) {
        this.servletRequest=servletRequest;
        
    }
    
}

Now we have declared three attributes here

private File toBeUploaded  //Actual file to be uploaded
private String toBeUploadedFileName // file name of actual file to be uploaded
private String toVeUploadedContentType  // content type of actual file to be uploaded

We have provided getters and setters for above attributes.So struts 2 automatically set these value according to file being uploaded.
For example if your file name is “sampleFile” then struts 2 interceptor add three parameters to request.
Three parameters are:
[sampleFile]:file
[sampleFile]FileName:String
[sampleFile]ContentType:String

you can notice here that we have given our action class attributes in same format so it will automatically set these attributes according to file being uploaded.

One more thing is that we have implemented “ServletRequestAware” interface in our action class
This is to get ServletRequest object.This request object is required to get path of server machine where file is to be uploaded.

JSPs:

fileUpload.jsp:

 <%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>

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

We have used tag for file upload interface.

uploadSucceed.jsp:
Create jsp named “uploadSucceed.jsp” under WebContent folder.
Copy following content into uploadSucceed.jsp.

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>

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







File Name :

Content type:

User file :

Uploaded file:
">

Create struts.xml under src folder.
Copy following content to struts.xml

    
        
            
                1048576
                
                    image/png,image/gif,image/jpeg,image/pjpeg
        
            
            
            uploadSucceed.jsp
            fileUpload.jsp
        
    

Web.xml:

It is same as in previous posts except that we have changed welcome file to “fileUpload.jsp”
Copy following content into web.xml

    
        
            
                1048576
                
                    image/png,image/gif,image/jpeg,image/pjpeg
        
            
            
            uploadSucceed.jsp
            fileUpload.jsp
        
    

Run project:

Right click on project ->run as->run on server

copy resultant url(http://localhost:8080/fileUploadInStruts2/) to your browser.

Now we will browse here text file and click upload.Following screen will appear

Now again copy http://localhost:8080/fileUploadInStruts2/ url to your browser and press enter

you will get first screen again.We will browse image file named “nature.jpeg” and click on upload.

you will get following screen

Source code:

Source:Download without jars files 
Source + lib: Download with jars files

Now in next post,we will write struts 2 ajax example.