JFinal启动log4j报错?报错
@JFinal 你好，想跟你请教个问题：现在项目启动后log4j报错。报错信息如下：
log4j:ERROR A "org.apache.log4j.ConsoleAppender" object is not assignable to a "org.apache.log4j.Appender" variable.
log4j:ERROR The class "org.apache.log4j.Appender" was loaded by
log4j:ERROR [sun.misc.Launcher$AppClassLoader@2994363b] whereas object of type
log4j:ERROR "org.apache.log4j.ConsoleAppender" was loaded by [WebAppClassLoader=1139254871@43e7a657].
log4j:ERROR Could not instantiate appender named "stdout".
log4j:ERROR A "org.apache.log4j.FileAppender" object is not assignable to a "org.apache.log4j.Appender" variable.
log4j:ERROR The class "org.apache.log4j.Appender" was loaded by
log4j:ERROR [sun.misc.Launcher$AppClassLoader@2994363b] whereas object of type
log4j:ERROR "org.apache.log4j.FileAppender" was loaded by [WebAppClassLoader=1139254871@43e7a657].
log4j:ERROR Could not instantiate appender named "file".
log4j配置如下：
log4j.rootLogger=WARN, stdout, file
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%n%-d{yyyy-MM-dd HH🇲🇲ss}%n[%p]-[Thread: %t]-[%C.%M()]: %m%n
# Output to the File
log4j.appender.file=org.apache.log4j.FileAppender
log4j.appender.file.File=./WebRoot/WEB-INF/BP.log
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%n%-d{yyyy-MM-dd HH🇲🇲ss}%n[%p]-[Thread: %t]-[%C.%M()]: %m%n
写回答
-
https://developer.aliyun.com/profile/5yerqm5bn5yqg?spm=a2c6h.12873639.0.0.6eae304abcjaIB看了这个帖子弄好了。<arel="nofollow">http://www.oschina.net/question/1780165_157548。加上slf4j-api-1.6.1.jar、slf4j-log4j12-1.6.1.jar就好了。之前的项目没有用这两包也不会报错。
看看这个：
<preclass="brush:c#;toolbar:true;auto-links:false;">log4j.rootLogger=DEBUG,stdout,filelog4j.appender.stdout=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=%n%-d{yyyy-MM-ddHH:mm:ss}%n[%p]-[Thread:%t]-[%C.%M()]:%m%n#OutputtotheFilelog4j.appender.file=org.apache.log4j.FileAppenderlog4j.appender.file.File=./jfinal.loglog4j.appender.file.layout=org.apache.log4j.PatternLayoutlog4j.appender.file.layout.ConversionPattern=%n%-d{yyyy-MM-ddHH:mm:ss}%n[%p]-[Thread:%t]-[%C.%M()]:%m%n
弄好了。加了slf4j-api.jar和slf4j-log4j.jar就好了。还是会报错。一样的错误。2020-06-14 17:01:21赞同 展开评论 打赏
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