Apache Log4j 是一个众所周知的用于记录应用程序行为的框架。 Log4j 2是对Log4j的升级，可提供重大改进，超越其前身Log4j 1.x，并提供许多其他现代功能 ，例如对标记的支持，使用查找的属性替换等等。 更新内容： As of Log4j 2.9.0, the Log4j API was modified to use java.util.ServiceLoader
to locate Log4j implementations, although the former binding mechanism
is still supported. The Log4j API jar is now a multi-release jar to provide implementations of Java 9 specific classes. Multi-release jars are not supported by the OSGi specification so OSGi modules
will not be able to take advantage of these implementations but will
not lose functionality as they will fall back to the implementations
used in Java 7 and 8. More details on the new features and fixes are
itemized below. Note that some tools are not compatible with
multi-release jars and may fail trying to process class files in the
META-INF/versions/9 folder. Those errors should be reported to the tool
vendor.
完整内容请查看发布主页。 下载地址：https ：//logging.apache.org/log4j/2.x/ | 
