uploading of files and images

I have to upload images and pdf files from client side to server side, using browsing of file. I m using jboss,Tomcat and Apolloclient. How can i do that?? Which f开发者_如何学编程unction and library have to refer???

You can use Apache's common's file upload, here is quick start up guide

Is what you want? And another link on that question

I offer for is ZUpload good applet product free and very useful! it will help you to upload files to ftp server.