log4j.xml配置示例

1、一般的log4j.xml的两种配置方式：
1、Logger 完成日志信息的处理
定义输出的层次和决定信息是否输出
DEBUG<INFO<WARN<ERROR

2、Appender 设置日志信息的去向
常用的:
org.apache.log4j.ConsoleAppender(控制台)
org.apache.log4j.FileAppender(文件)
org.apache.log4j.DailyRollingFileAppener(每天产生一个日志文件)
org.apache.log4j.RollingFileAppender(文件大小到达指定尺寸的时候产生一个新的文件)
org.apache.log4j.WriterAppender(将日志讯息以串流格式发送到任意指定的地方)
org.apache.log4j.JdbcAppender(将日志讯息保存到数据库中)

3、Layout 设置日志信息的输出样式
layout有以下几种:
org.apache.log4j.HTMLLayout(以HTML表格形式布局)
org.apache.log4j.SimpleLayout(包含日志讯息的级别和讯息字符串)
org.apache.log4j.TTCCLayout(包含日志产生的时间、执行绪、类别等讯息)
org.apache.log4j.PatterLayout(可以灵活地指定布局格式)

4、配置文件 log4j.properties或log4j.xml
log4j.properties实例:
log4j.logger.com.jjm.util=INFO, A1,A2
log4j.logger.com.jjm.dao=DEBUG, A1                     （com.jjm.util和com.jjm.dao是class全名匹配字符串）

log4j.appender.A1=org.apache.log4j.ConsoleAppender
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=[%d{yyyy-MM-dd HH:mm:ss}][%C-%M]%m%n

log4j.appender.A2=org.apache.log4j.RollingFileAppender
log4j.appender.A2.File=sshdemo.log
log4j.appender.A2.MaxFileSize=500KB
log4j.appender.A2.MaxBackupIndex=1
log4j.appender.A2.layout=org.apache.log4j.PatternLayout
log4j.appender.A2.layout.ConversionPattern=[%d{yyyy-MM-dd HH:mm:ss}][%C-%M]%m%n

log4j.xml实例:
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">

<appender name="filelog_appender"
        class="org.apache.log4j.RollingFileAppender">
        
        <param name="File" value="log/testlog4jxml_all.log" />
        
        <param name="Append" value="true" />
        
        <param name="MaxFileSize" value="1MB" />
        
        <param name="MaxBackupIndex" value="10000" />
        
        <layout class="org.apache.log4j.PatternLayout">
            <param name="ConversionPattern" value="%d{yyyy-MM-dd HH:mm:ss} %-5p (%c:%L)- %m%n" />
        </layout>
    </appender>

<appender name="A2" class="org.apache.log4j.ConsoleAppender">
    <layout class="org.apache.log4j.PatternLayout">
        <param name="ConversionPattern" value="[%d{yyyy-MM-dd HH:mm:ss}][%C-%M]%m%n" />
    </layout>
</appender>

<logger name="com.jjm.dao">
    <level value="DEBUG" />
    <appender-ref ref="A1" />
</logger>

<root>
    <priority value="DEBUG" />
    <appender-ref ref="A2" />
</root>

</log4j:configuration>
以上来自：http://www.blogjava.net/thisliy/archive/2009/06/01/279377.html

2、 log4j.xml向db、发邮件多种接入方式：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">

<log4j:configuration>

<appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
   <param name="ConversionPattern"
    value="%d - %c -%-4r [%t] %-5p %x - %m%n" />
</layout>


<filter class="org.apache.log4j.varia.LevelRangeFilter">
   <param name="LevelMax" value="ERROR"/>
   <param name="LevelMin" value="TRACE"/>
</filter>
</appender>

<appender name="FILE" class="org.apache.log4j.FileAppender">
<param name="File" value="C:/log4j1.log"/>
<layout class="org.apache.log4j.PatternLayout">
   <param name="ConversionPattern"
    value="%d - %c -%-4r [%t] %-5p %x - %m%n" />
</layout>
</appender>

<appender name="DATABASE" class="org.apache.log4j.jdbc.JDBCAppender">
<param name="URL" value="jdbc:oracle:thin:@192.168.0.59:1521:oanet"/>
<param name="driver" value="oracle.jdbc.driver.OracleDriver"/>
<param name="user" value="hdczoa"/>
<param name="password" value="system"/>
<layout class="org.apache.log4j.PatternLayout">
   <param name="ConversionPattern"
    value="INSERT INTO hdczoa.LOG4J(stamp,thread, info_level,class,message) VALUES ('%d', '%t', '%p', '%c', %m)" />
</layout>
</appender>


<appender name="MAIL"
class="org.apache.log4j.net.SMTPAppender">
<param name="threshold" value="debug" />


<param name="BufferSize" value="512" />
<param name="From" value="[email protected]" />
<param name="SMTPHost" value="smtp.163.com" />
<param name="Subject" value="juyee-log4jMessage" />
<param name="To" value="[email protected]" />
<param name="SMTPUsername" value="test" />
<param name="SMTPPassword" value="test" />
<layout class="org.apache.log4j.PatternLayout">
   <param name="ConversionPattern"
    value="%-d{yyyy-MM-dd HH:mm:ss.SSS} [%p]-[%c] %m%n" />
</layout>
</appender>

<appender name="ASYNC" class="org.apache.log4j.AsyncAppender">
<param name="BufferSize" value="256" />
<appender-ref ref="DATABASE" />
</appender>


<logger name="com.litt2.log4j" additivity="false">
        <level value="WARN" />
        <appender-ref ref="CONSOLE" />
    </logger>


<category name="com.litt3">
    <level value="DEBUG" />
       <appender-ref ref="CONSOLE" />
       <appender-ref ref="MAIL" />
</category>

<root>
<priority value="debug" />
<appender-ref ref="CONSOLE" />
<appender-ref ref="FILE" />
</root>

</log4j:configuration>
3、接入log4j.xml的web.xml的配置：
Web配置log4j,需求增加以下内容到WEB-INF/web.xml
　　<context-param>
        <param-name>webAppRootKey</param-name>
        <param-value>smilecargo.root</param-value>
    </context-param>
    <context-param>
        <param-name>log4jConfigLocation</param-name>
        <param-value>classpath:log4j.xml</param-value>
    </context-param>
    <context-param>
        <param-name>log4jRefreshInterval</param-name>
        <param-value>60000</param-value>
    </context-param>
　　<listener>
        <listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
    </listener>
${smilecargo.root}是web工程相对路径

4、接入log4j.xml参数配置说明：
    
    
    
    
    
    
    
    
    
以上来自：http://www.cnblogs.com/tqsummer/archive/2010/08/26/1809232.html

5、备注：
<logger name="com.runway.bssp.activeXdemo" additivity="false">
         <priority value ="info"/>
</logger>
调试时，加类似上面这个logger节点，可以定义只打印具体类，及莫个包下的日志
整合下供自己以后参考使用

转载地址：http://blog.csdn.net/subuser/article/details/20645163

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