log4j:WARN No appenders could be…
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log4j:WARN Noappenders could be found for logger
(org.springframework.context.support.ClassPathXmlApplicationC
log4j:WARN Pleaseinitialize the log4j system properly.
Spring
要解决这个问题非常简单,建立LOG4J
择菜单File> New > File,文件名输入log4j.properties,文件内容如下所示:
log4j.rootLogger=WARN,stdout
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%d %p [%c]- %m%n
清单10.6log4j
加入了这个配置文件后,再次运行程序上面的警告就会消失。尤其在进行
候,只有加入了这个文件后才能看到Spring
时,经常有人遇到出现404
下这个文件是不是存在。
org.springframework.core.CollectionFactory2008-05-1718:50log4j:WARN No appenders could be found for logger(org.springframework.core.CollectionFactory).
log4j:WARN Pleaseinitialize the log4j system properly.
常用log4j配置,一般可以采用两种方式,.properties和.xml,下面举两个简单的例子:
一、log4j.properties
###
log4j.category.org.zblog=ERROR,A1
log4j.category.org.zblog=INFO,A2
log4j.appender.A1=org.apache.log4j.ConsoleAppender
###
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
###
log4j.appender.A1.layout.ConversionPattern=%d{yyyy-MM-ddHH:mm:ss,SSS} [%c]-[%p] %m%n
###
log4j.appender.A2=org.apache.log4j.RollingFileAppender
###
log4j.appender.A2.File=E:/study/log4j/zhuwei.html
###
log4j.appender.A2.MaxFileSize=500KB
###
log4j.appender.A2.MaxBackupIndex=1
log4j.appender.A2.layout=org.apache.log4j.HTMLLayout
##指定采用html方式输出
二、log4j.xml
<?xmlversion="1.0" encoding="GB2312"?>
<!DOCTYPE log4j:configuration SYSTEM"log4j.dtd">
<log4j:configurationxmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="org.zblog.all"class="org.apache.log4j.RollingFileAppender">
<!--
</appender>
<appender name="org.zblog.zcw"class="org.apache.log4j.RollingFileAppender">
</appender>
<loggername="zcw.log"><!--
</logger>
<root><!--
</root>
</log4j:configuration>
三、配置文件加载方法:
importorg.apache.log4j.Logger;
importorg.apache.log4j.PropertyConfigurator;
importorg.apache.log4j.xml.DOMConfigurator;
public class Log4jApp{
}
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