关于java的log4j配置

.肯定是要进入相应的log4j包：log4j.x.jar包

2.在web.xml写入上下文

<context-param>
        <param-name>log4jConfigLocation</param-name>
       <param-value>/WEB-INF/log4j.properties</param-value>
</context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>

<context-param>
        <param-name>log4jConfigLocation</param-name>
       <param-value>/WEB-INF/log4j.properties</param-value>
</context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>

<context-param>
	    <param-name>log4jConfigLocation</param-name>
	   <param-value>/WEB-INF/log4j.properties</param-value>
</context-param><listener><listener-class>org.springframework.web.context.ContextLoaderListener</listener-class></listener>

3.配置log4j.properties属性文件

[java] view plaincopyprint?

################ FATAL, ERROR, WARN, INFO, DEBUG
log4j.rootLogger=WARN,stdout,D,E

### stdout ###
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.Target=System.out
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern= %d{ABSOLUTE} %5p %c{1}:%L - %m%n

### logFile ###
### save error to another file ###
log4j.appender.D=org.apache.log4j.DailyRollingFileAppender
log4j.appender.D.File=D:/logs/test-error.log
log4j.appender.D.Append=true
#error only in this file
log4j.appender.D.Threshold =WARN
log4j.appender.D.layout=org.apache.log4j.PatternLayout
log4j.appender.D.layout.ConversionPattern=%-d{yyyy-MM-dd HH:mm:ss} [%t:%r] - [%p]  %m%n
然后在写一个class文件运行加可以了