运行java程序时:
log4j:WARN No appenders could be found for logger
log4j:WARN Please initialize the log4j system properly.
原因:
引用了log4j-1.XXX 没有配置log4j.xml
解决:
在程序目录下,新建log4j.xml,复制下面的内容。
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<!-- Property myzion.root is defined in the web.xml in the context param
"webAppRootKey" -->
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="console" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern" value="[%-5p]%c[%L]: %m%n"/>
</layout>
<!--过滤器设置输出的级别 -->
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="levelMin" value="debug"/>
<param name="levelMax" value="error"/>
</filter>
</appender>
<root>
<priority value="debug"/>
<appender-ref ref="console"/>
</root>
</log4j:configuration>