Apache Log4j 2.0 发布第 4 个 Beta 版本，包括的新特性有：
Added Log4j 2 to SLF4J adapter.
LOG4J2-131: Add SMTPAppender. Thanks to Scott Severtson.
Added hostName and contextName to property map.
Add MessageFormatMessage and FormattedMessage.
LOG4J2-134: Use %red, %white, %blue, and so on in the console appender.
LOG4J2-133: Allow custom message creation via a message factory.
Added Flume Appender samples.
还包括诸多 bug 修复。
项目主页：http://logging.apache.org/log4j/2.x/
下载地址：http://logging.apache.org/log4j/1.2/download.html
来自:开源中国社区
