关于log4j.properties 文件的配置 和 程序调用日志输出的问题 大家帮帮忙,明天要提交Sample

Question

要分级，必须用xml格式的配置文件，里面有过滤器设置的。

Answer 1

给你看个例子，我的一个项目中的，我想就不用多具体解释了吧，一看就明白：
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j="http://jakarta.apache.org/log4j/">
<appender name="CON" class="org.apache.log4j.ConsoleAppender">
<layout class="org.apache.log4j.PatternLayout">
<param name="ConversionPattern"
value="%-5p %F (line:%L) - %m%n" />
</layout>
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="levelMin" value="DEBUG" />
<param name="levelMax" value="ERROR" />
<param name="AcceptOnMatch" value="true" />
</filter>
</appender> <appender name="INFOLOG"
class="org.apache.log4j.DailyRollingFileAppender">
<param name="Append" value="true" />
<param name="File" value="../webapps/ROOT/teyes_info_log.htm" />
<param name="DatePattern" value="yyyy-MM-dd" />
<layout class="org.apache.log4j.HTMLLayout" />
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="levelMin" value="INFO" />
<param name="levelMax" value="INFO" />
<param name="acceptOnMatch" value="true" />
</filter>
</appender>

<appender name="ERRLOG"
class="org.apache.log4j.DailyRollingFileAppender">
<param name="Append" value="true" />
<param name="File" value="../webapps/ROOT/teyes_err_log.htm" />
<param name="DatePattern" value="yyyy-MM-dd" />
<layout class="org.apache.log4j.HTMLLayout" />
<filter class="org.apache.log4j.varia.LevelRangeFilter">
<param name="levelMin" value="ERROR" />
<param name="levelMax" value="ERROR" />
<param name="acceptOnMatch" value="true" />
</filter>
</appender>
<logger name="com.ebt.tsef" additivity="false">
<level value="DEBUG" />
<appender-ref ref="CON" />
<appender-ref ref="ERRLOG" />
<appender-ref ref="INFOLOG" />
</logger>
<logger name="com.cddx.teyes" additivity="false">
<level value="DEBUG" />
<appender-ref ref="CON" />
<appender-ref ref="ERRLOG" />
<appender-ref ref="INFOLOG" />
</logger>
<root>
<level value="FATAL" />
<appender-ref ref="ERRLOG" />
</root>
</log4j:configuration>

Answer 2

logger name="com.cddx.teyes" 这个就可以分模块（我的理解就是分包？对吗？看你的具体需求了。）其实就是一个前缀匹配。

Answer 3

经典, 开了眼界, 以前看 log4j.properties 多简单, 以为那个 log4j.xml 又复杂又多余的.孤陋寡闻啊.

Answer 4

分模块输出，还找到一种方法：
配置文件如下 : 
log4j.root=DEBUG, console
log4j.category.db=DEBUG,console,dbfilelog
log4j.category.app=DEBUG, console, appfilelog#定义console appenderlog4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%d{ISO8601}:%6r:%p:%m%n#定义db的appender
log4j.appender.dbfilelog=org.apache.log4j.RollingFileAppender
log4j.appender.dbfilelog.layout=org.apache.log4j.PatternLayout
log4j.appender.dbfilelog.layout.ConversionPattern=%d{ISO8601}:%r:%p:%m:%c:%t:%l%n
log4j.appender.dbfilelog.File=D:/database.log
log4j.appender.dbfilelog.MaxFileSize=10MBlog4j.appender.dbfilelog.MaxBackupIndex=10#定义application的appender
log4j.appender.appfilelog=org.apache.log4j.RollingFileAppender
log4j.appender.appfilelog.layout=org.apache.log4j.PatternLayout
#log4j.appender.appfilelog.layout.ConversionPattern=%d{ISO8601}:%r:%p:%m:%c:%t:%l%n
log4j.appender.appfilelog.File=D:/application.log
log4j.appender.appfilelog.MaxFileSize=10MB
log4j.appender.appfilelog.MaxBackupIndex=10
调用时用：
Logger.getLogger("category.db");//声明db的logger
Logger.getLogger("category.app");//声明app的logger

Answer 5

分级必须用xml格式的。给你一段文章，你一看就明白。
-----Original Message-----
From: Kevin Dougan [mailto:[EMAIL PROTECTED] 
Sent: 2003年10月9日 21:05
To: Log4J Users List; [EMAIL PROTECTED]
Subject: RE: log4j.properties - How to parse outpu to multiple filesSimple!
Just add one "LevelMax" line, immediately after the "LevelMin" line, to
log4j.xml:<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration xmlns:log4j='http://jakarta.apache.org/log4j/'>        <appender name="STDOUT" class="org.apache.log4j.ConsoleAppender">
                <layout class="org.apache.log4j.PatternLayout">
                     <param name="ConversionPattern" value="%c %d{ISO8601}
-- %p -- %m%n"/>
                </layout>
        </appender>        <appender name="DEBUG" class="org.apache.log4j.RollingFileAppender">
      <param name="File" value="C:\\logs\\app-debug.log"/>
      <param name="Append" value="true"/>
      <param name="MaxFileSize" value="500KB"/>
      <param name="MaxBackupIndex" value="2"/>
                <layout class="org.apache.log4j.PatternLayout">
                     <param name="ConversionPattern" value="%c %d{ISO8601}
-- %p -- %m%n"/>
                </layout>
                <filter class="org.apache.log4j.varia.LevelRangeFilter">
                        <param name="LevelMin" value="DEBUG" />
                        <param name="LevelMax" value="DEBUG" />
                </filter>
        </appender>        <appender name="INFO" class="org.apache.log4j.RollingFileAppender">
      <param name="File" value="C:\\logs\\app-info.log"/>
      <param name="Append" value="true"/>
      <param name="MaxFileSize" value="500KB"/>
      <param name="MaxBackupIndex" value="2"/>
                <layout class="org.apache.log4j.PatternLayout">
                     <param name="ConversionPattern" value="%c %d{ISO8601}
-- %p -- %m%n"/>
                </layout>
                <filter class="org.apache.log4j.varia.LevelRangeFilter">
                        <param name="LevelMin" value="INFO" />
                        <param name="LevelMax" value="INFO" />
                </filter>
   </appender>        <appender name="WARN" class="org.apache.log4j.RollingFileAppender">
      <param name="File" value="C:\\logs\\app-warn.log"/>
      <param name="Append" value="true"/>
      <param name="MaxFileSize" value="500KB"/>
      <param name="MaxBackupIndex" value="2"/>
                <layout class="org.apache.log4j.PatternLayout">
                     <param name="ConversionPattern" value="%c %d{ISO8601}
-- %p -- %m%n"/>
                </layout>
                <filter class="org.apache.log4j.varia.LevelRangeFilter">
                        <param name="LevelMin" value="WARN" />
                        <param name="LevelMax" value="WARN" />
                </filter>
   </appender>        <appender name="ERROR" class="org.apache.log4j.RollingFileAppender">
      <param name="File" value="C:\\logs\\app-error.log"/>
      <param name="Append" value="true"/>
      <param name="MaxFileSize" value="500KB"/>
      <param name="MaxBackupIndex" value="2"/>
                <layout class="org.apache.log4j.PatternLayout">
                     <param name="ConversionPattern" value="%c %d{ISO8601}
-- %p -- %m%n"/>
                </layout>
                <filter class="org.apache.log4j.varia.LevelRangeFilter">
                        <param name="LevelMin" value="ERROR" />
                        <param name="LevelMax" value="ERROR" />
                </filter>
   </appender>        <root>
                <priority value="debug"/>
        <appender-ref ref="STDOUT"/>
        <appender-ref ref="DEBUG"/>
        <appender-ref ref="INFO"/>
        <appender-ref ref="WARN"/>
        <appender-ref ref="ERROR"/>
        </root></log4j:configuration>-----Original Message-----
From: Yu Xiang Xi (Maveo) [mailto:[EMAIL PROTECTED]
Sent: October 9, 2003 5:07 AM
To: 'Log4J Users List'
Subject: RE: log4j.properties - How to parse outpu to multiple files
Setting Threshold=ERROR can force log4j to log the higher priority loggings
of ERROR & FATAL, as demonstrated by Adrian Janssen said below.But I'm wondering to know if there's a way to log only ERROR loggings, no
FATAL in one appender. That is, one appender to log only one level; not to
log one level and its higher levels.Xi Yuxiang
System Architect
Maveo Systems Limited