wro4j is a project that will help you to easily improve your Web application page loading time. It can help you to keep your static resources (JavaScript and CSS) well organized, merge and minify them at run-time (using a simple filter) or build-time (using a Maven plugin), and has several features you may find useful when dealing with Web resources.

Changes

This release adds callback support, adds a new naming strategy based on timestamps, fixes encoding-related issues, upgrades rhino-based processors to their latest versions (less, coffeeScript, uglifyJs, jsLint, cssLint, jsHint), and adds other minor fixes and improvements.

URL: Features - wro4j - Web Resource Optimizer for Java - wro4j - Google Project Hosting