JRebel是一套JavaEE开发工具。JRebel允许开发团队在有限的时间内完成更多的任务修正更多的问题，发布更高质量的软件产品。JRebel是收费软件，用户可以在JRebel官方站点下载30天的评估版本。

Jrebel 可快速实现热部署，节省了大量重启时间，提高了个人开发效率。

JRebel是一款JAVA虚拟机插件，它使得JAVA程序员能在不进行重部署的情况下，即时看到代码的改变对一个应用程序带来的影响。JRebel使你能即时分别看到代码、类和资源的变化，你可以一个个地上传而不是一次性全部部署。当程序员在开发环境中对任何一个类或者资源作出修改的时候，这个变化会直接反应在部署好的应用程序上，从而跳过了构建和部署的过程，每年可以省去部署用的时间花费高达5.25个星期。

更新：

JRebel 5.5.2 (18th March 2014)

Added support for JBoss 6.2EAP

Added support for Stripes-Guice 1.5

Added support for EBean javaagent

Improved anonymous inner class handling in JRebel. Should be much more consistent

Improved performance for WebSphere servers, introduced resource URL caching

Fixed an issue that caused a CannotCompileException to occur in Spring MVC 3.1.0.M2

Fixed an issue that caused a CannotCompileException to occur in Liferay 5.2.3

Fixed an issue that caused a CannotCompileException to occur in GWT 2.6

Fixed an issue that caused a CannotCompileException to occur Websphere Liberty Profile 8.5 using MyFaces

Fixed an issue that would cause the Hibernate cache to be closed after reload

Fixed an issue that caused state to be lost for stateful EJBs on JBoss 7

Fixed an issue that would cause @PostConstruct methods on EJBs deployed to WAS to be called multiple times

Updated JRebel Remoting to not require rebel.xml files in modules deployed to remote server