java.lang.ClassNotFoundException：org.apache.log4j.Level
我正在尝试在swing应用程序中使用hibernate 3.5.1 final，这里是我正在使用的jar：
- hibernate核心3.5.1决赛
- hibernate-的EntityManager-3.5.1-决赛
- hibernate-jpa-2.0-api-1.0.0.Final
- 冬眠的注解-3.5.1-决赛
- hibernate-commons-annotations-3.2.0.Final
- dom4j的-1.6.1
- SLF4J-API-1.6.4
- SLF4J-log4j12-1.6.4
当我尝试运行该应用程序时，出现以下错误：
Failed to instantiate SLF4J LoggerFactory Reported exception: java.lang.NoClassDefFoundError: org/apache/log4j/Level at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128) at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:279) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:252) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:265) at org.hibernate.cfg.Configuration.(Configuration.java:165) at org.hibernate.ejb.Ejb3Configuration.(Ejb3Configuration.java:127) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:54) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32) at com.xeno.xecamp.desktopManagement.Main.main(Main.java:16) Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Level at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) ... 11 more Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/log4j/Level at org.slf4j.LoggerFactory.bind(LoggerFactory.java:128) at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:108) at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:279) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:252) at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:265) at org.hibernate.cfg.Configuration.(Configuration.java:165) at org.hibernate.ejb.Ejb3Configuration.(Ejb3Configuration.java:127) at org.hibernate.ejb.HibernatePersistence.createEntityManagerFactory(HibernatePersistence.java:54) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:48) at javax.persistence.Persistence.createEntityManagerFactory(Persistence.java:32) at com.xeno.xecamp.desktopManagement.Main.main(Main.java:16) Caused by: java.lang.ClassNotFoundException: org.apache.log4j.Level at java.net.URLClassLoader$1.run(URLClassLoader.java:202) at java.security.AccessController.doPrivileged(Native Method) at java.net.URLClassLoader.findClass(URLClassLoader.java:190) at java.lang.ClassLoader.loadClass(ClassLoader.java:307) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301) at java.lang.ClassLoader.loadClass(ClassLoader.java:248) 您还需要在类路径中包含Log4J JAR文件。
请注意， slf4j-log4j12-1.6.4.jar只是一个适配器，可以通过SLF4J API使用Log4J。 它不包含Log4J的实际实现。
您需要下载log4j并添加到类路径中。
在我的环境中，我只是将两个文件添加到类路径中。 并且工作正常。
slf4j-jdk14-1.7.25.jar slf4j-api-1.7.25.jar