Log4j 2.0 正式版终于发布了，改进内容： New features:o LOG4J2-519: Added support for generating custom logger wrappers that replace the existinglog levels and extended logger wrappers that add custom log levels to the existing ones. o LOG4J2-696: RegexFilter does not match multiline log messages. Fixed Bugs:o LOG4J2-705: Fixed issue where Async Logger does not log thread context stack data. API change: added method getImmutableStackOrNull() to ThreadContext.ContextStack interface.o LOG4J2-631: Update docs to clarify how to use formatter logger and standard logger together.o LOG4J2-441: LoggerConfigs with no Level now inherit the Level from their parent. o LOG4J2-703: Android: Could not find class 'javax.naming.InitialContext', referenced frommethod org.apache.logging.log4j.core.lookup.JndiLookup.lookup. Thanks to Nelson Melina. o LOG4J2-699: PatternLayout manual page missing documentation on header/footer. o LOG4J2-625: Fixed Serialization error with SocketAppender and Async Loggers. (Fixed in RC2, but wasn't included in release notes.) o LOG4J2-538: JMX GUI: fixed occasional ArrayIndexOutOfBoundsException after pressing "reconfigurewith XML below". (Fixed in RC2, but wasn't included in release notes.) o LOG4J2-666: AsyncLoggerContextSelector should ensure that different AsyncLoggerContextobjects created by web app classloaders have unique names. o LOG4J2-683: Fix annotation processor warnings on JDK 1.7+. Thanks to Jurriaan Mous. o LOG4J2-694: Fix strange compilation error that popped up in a test class. o LOG4J2-692: Update documentation to specify only Maven 3 is supported. o LOG4J2-690: Log4j Web test dependencies should be in scope "test" in the pom. Thanks toPhilip Helger. o LOG4J2-682: Special characters (tab and so on) in PatternLayout do not work. Thanks toScott Harrington. o LOG4J2-686: Core's OptionConverter support for \b is broken (affects PatternLayout). o LOG4J2-687: Rename org.apache.logging.log4j.core.util.Closer.closeSilent() to closeSilently().o LOG4J2-688: Make org.apache.logging.log4j.core.layout.PatternLayout immutable. o LOG4J2-707: Some exceptions are not logged when configuration problems are detected. Changes:o LOG4J2-685: Make org.apache.logging.log4j.core.layout.AbstractLayout immutable. o LOG4J2-689: Update Jackson to 2.4.1. o LOG4J2-709: Update Apache Commons Logging to 1.2 from 1.1.3. Log4j 2.0 网页：http://logging.apache.org/log4j/2.x/ 新的 Logo 看着不错：
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