Caused by: java.lang.ClassNotFoundException: ch.qos.logback.core.joran.spi.JoranException

确保这以下两个包都已经导入到了项目中来, 而且版本要一致:

logback-classic-0.9.24.jar
logback-core-0.9.24.jar

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因为网络原因，maven自动下载的时候没下载完全，需要删除.m2\repository\ch\qos\logback目录下的包重新保存一下pom.xml重新下载如果你的项目用的maven的话, 请参考:http://blog.csdn.net/yinzn2011/article/details/50822242这篇文章;如果你没用maven的话, 没关系, 我带了http://download.csdn.net/detail/love_legain/9880937
附录:

java.lang.NoClassDefFoundError: ch/qos/logback/core/joran/spi/JoranException
at org.slf4j.LoggerFactory.bind(LoggerFactory.java:129)
at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108)
at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:302)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:276)

............................
Caused by: java.lang.ClassNotFoundException: ch.qos.logback.core.joran.spi.JoranException
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)