eSearch is a server side Java-based search engine which supplies basic search capabilities for Web use. Its basic capabilities can be extended to include intelligent agents and other expert-system behaviors.
Java Search Engine is a server-side search engine program for web sites. Search engines provide to the site visitors easy and fast way to find what they want on your site. If you want to have search engine on your site - you can try Java Search Engine.
Java Search Engine has common Java API interfaces such as JSP, servlets and EJB. Can save results as XML and transform them into HTML using XSLT stylesheets.