[求助] Log4j按类输出日志

Question

具体配置在log4j.properties里log4j.logger.com.chouy.Class1=DEBUG,CONSOLElog4j.logger.com.chouy.Class2=INFO,CONSOLE以此类推。log4j.logger. 这个是前缀
然后后面跟上你的包名和类名。

Answer 1

楼上的,还是没搞明白.以下是我的程序和配置文件,请指正错误.///////////////  ClassLog.java  ////////////////////
package log4jtest;import org.apache.log4j.Logger;
import org.apache.log4j.Priority;
import org.apache.log4j.PropertyConfigurator;public class ClassLog
{
    static Logger logger = Logger.getLogger(ClassLog2.class.getName());
    
    public ClassLog()
    {
    }
    
    public static void main(String[] args)
    {
        PropertyConfigurator.configure
                   ("C:\\eclipse\\workspace\\mytest\\log4jtest\\log4j.properties");
        logger.debug("Start of the main() in classlog");
        logger.info("Just testing a log message with priority set to INFO");
        logger.warn("Just testing a log message with priority set to WARN");
        logger.error("Just testing a log message with priority set to ERROR");
        logger.fatal("Just testing a log message with priority set to FATAL");
        logger.log(Priority.WARN,"Testing a log message use a alternate form");
        logger.debug(ClassLog2.class.getName());
        ClassLog2 cl2 = new ClassLog2();
        cl2.log();
    }
}//////////////////  ClassLog2.java  ///////////////////
package log4jtest;import org.apache.log4j.Logger;
import org.apache.log4j.Priority;
import org.apache.log4j.PropertyConfigurator;public class ClassLog2
{
    static Logger logger = Logger.getLogger(ClassLog2.class.getName());
    
    public ClassLog2()
    {
        
    }
    
    public void log()
    {
        PropertyConfigurator.configure("C:\\eclipse\\workspace\\mytest\\log4jtest\\log4j.properties");
        logger.debug("Start of the main() in classlog2");
        logger.info("Just testing a log message with priority set to INFO");
        logger.warn("Just testing a log message with priority set to WARN");
        logger.error("Just testing a log message with priority set to ERROR");
        logger.fatal("Just testing a log message with priority set to FATAL");
        logger.log(Priority.WARN,"Testing a log message use a alternate form");
        logger.debug(ClassLog2.class.getName());
    }
}/////////////////  log4j.properties  ////////////////
log4j.logger=debug,stdout,S,R#2区
#Print only messages of priority WARN or higher for your category
log4j.logger.log4jtest.ClassLog=WARN,stdout,R
#log4j.logger.log4jtest.ClassLog=WARN
log4j.logger.log4jtest.ClassLog2=DEBUG,S
#log4j.logger.log4jtest.ClassLog2=DEBUG#3区
#### First appender writes to console
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
# Pattern to output the caller's file name and line number.
log4j.appender.stdout.layout.ConversionPattern=%5p [%t] (%F:%L) - %m%n#4区
#### Second appender writes to a file
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=c:\\example.log2
# Control the maximum log file size
log4j.appender.R.MaxFileSize=100KB
# Archive log files (one backup file here)
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d{yyyy-MM-dd hh:mm:ss}:%p %t %c - %m%nlog4j.appender.stdout2=org.apache.log4j.ConsoleAppender
log4j.appender.stdout2.layout=org.apache.log4j.PatternLayout
# Pattern to output the caller's file name and line number.
log4j.appender.stdout2.layout.ConversionPattern=[%t] (%F:%L) - %m%nlog4j.appender.S=org.apache.log4j.RollingFileAppender
log4j.appender.S.File=c:\\example.log
# Control the maximum log file size
log4j.appender.S.MaxFileSize=100KB
# Archive log files (one backup file here)
log4j.appender.S.MaxBackupIndex=1
log4j.appender.S.layout=org.apache.log4j.PatternLayout
log4j.appender.S.layout.ConversionPattern=%d{yyyy-MM-dd hh:mm:ss}:%p %t %c - %m%n

Answer 2

希望找到一个XML配置文件的解答.

Answer 3

想只把log4j的debug信息输出到debug.log.error信息输出到error.log，info信息输出到info.loglog4j提供了下面一种方式来实现.必须使用xml方式进行配置才能够支持filter过滤元素。配置文件来自：http://www.mail-archive.com/[email protected]/msg09720.html
<?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>

Answer 4

谢谢楼上的解答, 不过你的解答不是我的要求
我的要求是根据类名和包名决定是否输出, 并不是把不同级别的日志输出到不同的文件中.我已经用过滤器把这个问题解决了.
结贴了.
把我写的过滤器也贴上来:
//////////////////////    配置文件:    ////////////////////////
<filter class="log4jtest.ClassLogFilter">
      <param name="StringToMatch" value="log4jtest.CompareTools"/>
      <param name="AcceptOnMatch" value="false"/>
</filter>/////////////////////     log4jtest.ClassLogFilter   ///////////////////
package log4jtest;import org.apache.log4j.spi.Filter;
import org.apache.log4j.spi.LoggingEvent;
import org.apache.log4j.varia.StringMatchFilter;public class ClassLogFilter extends StringMatchFilter
{
    String stringToMatch = null;
    boolean acceptOnMatch = true;    @Override
    public int decide(LoggingEvent event)
    {
        // System.out.println(event.getLoggerName().indexOf(this.getStringToMatch())
        // == -1);
        System.out.println("acceptOnMatch =         " + acceptOnMatch);
        System.out.println("stringToMatch =         " + stringToMatch);
        System.out.println("event.getLoggerName() = " + event.getLoggerName());
        System.out.println(event.getLoggerName().indexOf(this.stringToMatch));
        if (event.getLoggerName().indexOf(this.stringToMatch) == -1)
            return Filter.ACCEPT;
        else
            // if (acceptOnMatch)
            return Filter.DENY;
        // else
        // return Filter.DENY;
    }    public boolean getAcceptOnMatch()
    {
        return acceptOnMatch;
    }    public void setAcceptOnMatch(Boolean acceptOnMatch)
    {
        this.acceptOnMatch = acceptOnMatch;
    }    public String getStringToMatch()
    {
        return stringToMatch;
    }    public void setStringToMatch(String stringToMatch)
    {
        this.stringToMatch = stringToMatch;
    }
}返回结果是返回ACCEPT显示, 返回DENY就不显示, 返回NATRUAL也显示.
具体过滤方法可以自己来定义.
我这里写的不是很详细,有兴趣的朋友可以自己去看看文档.