Excel file from Servlet

http://www.java-forums.org/blogs/servlet/668-how-write-servlet-sends-file-user-download.html http://www.mkyong.com/servlet/servlet-code-to-download-text-file-from-website-java/ http://stackoverflow.com/questions/1442893/implementing-a-simple-file-download-servlet http://todayguesswhat.blogspot.sg/2012/07/file-download-java-servlet-example-2gb.html http://stackoverflow.com/questions/11226603/create-an-excel-file-for-users-to-download-using-apache-poi-jsp http://nomanabbasi.wordpress.com/2011/09/13/jexcel-create-excel-file-using-outputstream/ http://www.roseindia.net/jsp/poi/Createexcel.shtml http://stackoverflow.com/questions/4112686/how-to-use-servlets-and-ajax http://stackoverflow.com/questions/1900711/handling-servlet-output-in-ajax http://courses.coreservlets.com/Course-Materials/ajax-basics.html