Struts File Download

Source: Internet
Author: User

=============================struts File Download ==================================

Step One: JSP page
<a href= "Download.action? fileName=img_0443.jpg "> Click here to download images </a>

Step Two: Action page



Import Org.apache.struts2.ServletActionContext;

Import Com.opensymphony.xwork2.ActionSupport;

public class Downloadaction extends actionsupport{
Read the directory of downloaded files
Private String InputPath;
filename of the download file
Private String FileName;
Read the input stream of the downloaded file
Private InputStream InputStream;

Types of download files
Private String Conetnttype;

Create InputStream input stream
Public InputStream getInputStream () throws filenotfoundexception{
String Path=servletactioncontext.getservletcontext ().
Getrealpath (InputPath);
return new Bufferedinputstream (new FileInputStream (path+ "\ \" +

Public String execute () {
return SUCCESS;
public void Setinputstream (InputStream inputstream) {
This.inputstream = InputStream;
Public String GetFileName () {
return fileName;
public void Setfilename (String fileName) {
This.filename = FileName;

Public String Getconetnttype () {
return conetnttype;

Public String Getinputpath () {
return inputpath;

public void Setinputpath (String inputpath) {
This.inputpath = InputPath;
public void Setconetnttype (String conetnttype) {
This.conetnttype = Conetnttype;

Step Three: Struts.xml file
<action name= "Download" class= "" >
<param name= "InputPath" >/upload</param>
<result name= "Success" type= "Stream" >
<param name= "ContentType" >image/pjpeg</param>
<param name= "InputName" >inputStream</param>
<param name= "contentdisposition" >attachment;filename= "${filename}" </param>
<param name= "BufferSize" >4096</param>

Hint: Stream result type
ContentType: Sets the MIME type to send to the browser
ContentLength: File Size
Contentdisposition: Sets the value of the Content-disposition parameter for the HTTP header information of the response
InputName: Specifies the property name of the InputStream type provided by the action
BufferSize: Set the size of the buffer when reading and downloading files

The variable names in both locations of the Struts.xml file and action must be correct.

Struts File Download

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