Mixer 0.71

Mixer (source, doc, jar, everything) is a helper-class that is easy to use for Servlet programmers that enable a complete separation of Servlet- and HTML-code. Licence: GNU GPL.

Example  Template Code Result
Non repeated HTML Java HTML
Repeated HTML Java HTML
Combined HTML Java HTML
Multiple repeated HTML Java HTML

Mixer does not use any new language and is very efficient. The template HTML-document is valid HTML that has two types of markers. Context-markers are markers, in the form of a HTML-comment, that are placed around parts of HTML-code that should be repeated:

    <a href="mailto:===email===">===email===</a>

Variable-markers are markers that should be substituted for values:

  My name is ===name=== and my email is <a href="mailto:===email===">===email===</a>.

For efficiency use Mixer in a Servlet like this:

Define a class-variable that holds a template HTML-document:

private static String htmlTemplate = null;

In method init, load content from a template HTML-file into this class-variable:

if (htmlTemplate == null) {
   htmlTemplate = Mixer.getContent(new File(getServletContext().getRealPath("x.html")));

In metod doGet and/or doPost:

Mixer m = new Mixer(htmlTemplate);
m.add("===email===", "pierre@dsv.su.se");
PrintWriter pw = response.getWriter();

Accordingly, costly file operations only take place during initialization of the Servlet. 

Mixer also adds functionality to mix different parts of different HTML-documents. This is done by preloading any number of template HTML-documents in the init-method and then selecting different parts of the template HTML-documents to build a new HTML-document. The resulting document can in turn be used as a template for further processing.

Please report bugs here.

Updated 2004-06-12 by Pierre A. I. Wijkman.

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