log4J错误

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>