【报错】ClassNotFoundException: org.apache.log4j.Level

【报错】

Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/log4j/Level

    at org.slf4j.LoggerFactory.bind(LoggerFactory.java:121)

    at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:111)

    at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:268)

    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:241)

    at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:254)

    at org.hibernate.cfg.Configuration.<clinit>(Configuration.java:197)

    at com.tgbnode.hibernate.Client.main(Client.java:14)

Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Level

    at java.net.URLClassLoader.findClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

    ... 7 more

【解决】

添加 log4j 的 Jar 文件。