logback 是由 log4j 创始人设计的又一个开源日志组件。logback 当前分成三个模块：logback-core、logback- classic 和 logback-access。logback-core 是其它两个模块的基础模块。logback-classic 是 log4j 的一个改良版本。此外 logback-classic 完整实现 SLF4J API 使你可以很方便地更换成其它日志系统如 log4j 或 JDK14 Logging。logback-access 访问模块与 Servlet 容器集成提供通过 Http 来访问日志的功能。 logback 1.2.22 更新内容： AsyncAppender no longer drops events when the current thread has its interrupt flag set. This issue was reported in LOGBACK-1247 by Jakob Bergendahl who also provided the relevant pull request. Removed JMSQueueAppender and JMSTopicAppender. These appenders were undocumented and had no apparent users. Remove comment in logback-classic's META-INF/services/javax.servlet.ServletContainerInitializer file in order to keep Wildfly 8 happy. This issue was reported in LOGBACK-1265 by Andy Wilkinson. FileSize.toString() now reports files sizes in GB in addition to sizes in MB and KB and Bytes. This fixes issue LOGBACK-1278. 下载地址： Source code (zip) Source code (tar.gz) logback 1.2.2 发布，Java 日志框架下载地址
