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What is java Filter ? With examples ... A filter is nothing but java class; A filter offers a useful way of performing filtered functionality in a java  web application. Typically, filters do not generate content themselves, although in this example, the filter will generate some minimal content to show how it is called. A filter implements the javax.servlet .Filter interface . The primary filter functionality is implemented by the doFilter() method of the filter. Method Summary  void destroy ()           Called by the web container to indicate to a filter that it is being taken out of service.  void doFilter ( ServletRequest  request,  ServletResponse  response,  FilterChain  chain)           The  doFilter  method of the Filter is called by the container each time a request/response pair is passed through the chain due to a client...

JSP Tutorial   JSP simply puts Java inside HTML pages.  You can take any existing HTML page and change its extension to ".jsp" instead of ".html".  In fact, this is the perfect exercise for your first JSP.   Change its extension from ".html" to ".jsp".  Now load the new file, with the ".jsp" extension, in your browser. You will see the same output, but it will take longer!  But only the first time.  If you reload it again, it will load normally. What is happening behind the scenes is that your JSP is being turned into a Java file, compiled and loaded.  This compilation only happens once, so after the first load, the file doesn't take long to load anymore.  (But everytime you change the JSP file, it will be re-compiled again.) Of course, it is not very useful to just write HTML pages with a .jsp extension!  We now proceed to see what makes JSP so useful.   JSP date example JSP date example JSP Date Example Till now you lear...