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    <p>You can save your file anywhere on your server, you just need to know the path.</p> <blockquote> <p>how i direct it as output stream?</p> </blockquote> <p>Here is a code snippet that can help you.</p> <pre><code>File fileOnServer = new File("Hello.txt"); // Give full path where your file is located byte[] file = new byte[(int) fileOnServer.length()]; FileInputStream fileInputStream = new FileInputStream(fileOnServer); fileInputStream.read(file); int contentLength = (int) file.length; response.setContentLength(contentLength); response.setHeader("Content-Disposition", "attachment; filename=\"Hello.txt\""); out = response.getOutputStream(); int bytesWritten = 0; byte[] buffer = new byte[1024]; while (bytesWritten &lt; contentLength) { int bytes = Math.min(1024, contentLength - bytesWritten); System.arraycopy(file, bytesWritten, buffer, 0, bytes); if (bytes &gt; 0) { out.write(buffer, 0, bytes); bytesWritten += bytes; } else if (bytes &lt; 0); } </code></pre> <blockquote> <p>get download to user end?</p> </blockquote> <p>Well you can add ClickHandler on a Button on your client side and override <code>onClick</code> method.</p> <pre><code>public void onClick(ClickEvent event) { Window.open("UrlToYourServelet", "_blank", "null"); } </code></pre> <p>Hope this helps!</p> <p><strong>EDIT</strong></p> <p>I have found a solution. You can upload the file at any free file hosting site like <a href="http://www.4shared.com/" rel="nofollow">this</a>. This site provides a URL for every uploaded file. So in your servelet, make a HTTP request to the URL and download the file in <code>byte[]</code> and write it on outputStream as shown in the code above.</p>
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    1. POJava + Google Web Toolkit (google apps engine) download file from server
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    1. COi guess you wrote the right answer but i am not owning any server i am using google apps enginee for apps deployment .. see this is the sample apps http://smereseda.appspot.com/ but i dont have any storage there so i am thinking that i might get some free space like dropbox where i can place my data and forward user to that but in case of dropox i have to make my data public that i dont let user to access
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    2. COand if i use your above code as apps engine do support servlet and war file but where do i place the file as it does not provide free space //Give full path where your file is located
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      1. USVipin Sahu
    3. COwhy dont u use BlobStore? Its free i guess. You can simply store your file in `byte[]` and access it through Blobstore. Have a look at this link. https://developers.google.com/appengine/docs/java/blobstore/overview
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