log4j.rootLogger=DEBUG,CONSOLE,A1,im
log4j.addivity.org.apache=true

# 应用于控制台

log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.Threshold=DEBUG
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n
#log4j.appender.CONSOLE.layout.ConversionPattern=[start]%d{DATE}[DATE]%n%p[PRIORITY]%n%x[NDC]%n%t[THREAD] n%c[CATEGORY]%n%m[MESSAGE]%n%n

#应用于文件

log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=file.log
log4j.appender.FILE.Append=false
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n
# Use this layout for LogFactor 5 analysis

# 应用于文件回滚

log4j.appender.ROLLING_FILE=org.apache.log4j.RollingFileAppender
log4j.appender.ROLLING_FILE.Threshold=ERROR
log4j.appender.ROLLING_FILE.File=rolling.log
log4j.appender.ROLLING_FILE.Append=true
log4j.appender.ROLLING_FILE.MaxFileSize=10KB
log4j.appender.ROLLING_FILE.MaxBackupIndex=1
log4j.appender.ROLLING_FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.ROLLING_FILE.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n

#应用于socket
log4j.appender.SOCKET=org.apache.log4j.RollingFileAppender
log4j.appender.SOCKET.RemoteHost=localhost
log4j.appender.SOCKET.Port=5001
log4j.appender.SOCKET.LocationInfo=true
# Set up for Log Facter 5
log4j.appender.SOCKET.layout=org.apache.log4j.PatternLayout
log4j.appender.SOCET.layout.ConversionPattern=[start]%d{DATE}[DATE]%n%p[PRIORITY]%n%x[NDC]%n%t[THREAD]%n%c[CATEGORY]%n%m[MESSAGE]%n%n

# Log Factor 5 Appender
log4j.appender.LF5_APPENDER=org.apache.log4j.lf5.LF5Appender
log4j.appender.LF5_APPENDER.MaxNumberOfRecords=2000

# 发送日志给邮件

log4j.appender.MAIL=org.apache.log4j.net.SMTPAppender
log4j.appender.MAIL.Threshold=FATAL
log4j.appender.MAIL.BufferSize=10
log4j.appender.MAIL.From=xxx@www.xxx.com
log4j.appender.MAIL.SMTPHost=www.wusetu.com
log4j.appender.MAIL.Subject=Log4J Message
log4j.appender.MAIL.To=xxx@www.xxx.com
log4j.appender.MAIL.layout=org.apache.log4j.PatternLayout
log4j.appender.MAIL.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n

# 用于数据库
log4j.appender.DATABASE=org.apache.log4j.jdbc.JDBCAppender
log4j.appender.DATABASE.URL=jdbc:mysql://localhost:3306/test
log4j.appender.DATABASE.driver=com.mysql.jdbc.Driver
log4j.appender.DATABASE.user=root
log4j.appender.DATABASE.password=
log4j.appender.DATABASE.sql=INSERT INTO LOG4J (Message) VALUES ('[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n')
log4j.appender.DATABASE.layout=org.apache.log4j.PatternLayout
log4j.appender.DATABASE.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n

log4j.appender.A1=org.apache.log4j.DailyRollingFileAppender
log4j.appender.A1.File=SampleMessages.log4j
log4j.appender.A1.DatePattern=yyyyMMdd-HH'.log4j'
log4j.appender.A1.layout=org.apache.log4j.xml.XMLLayout


输出到2000NT日志
 把Log4j压缩包里的NTEventLogAppender.dll拷到WINNT\SYSTEM32目录下

 log4j.logger.NTlog=FATAL, A8
 # APPENDER A8
 log4j.appender.A8=org.apache.log4j.nt.NTEventLogAppender
 log4j.appender.A8.Source=JavaTest
 log4j.appender.A8.layout=org.apache.log4j.PatternLayout
 log4j.appender.A8.layout.ConversionPattern=%-4r %-5p [%t] %37c %3x - %m%n

#自定义Appender

log4j.appender.im = net.cybercorlin.util.logger.appender.IMAppender

log4j.appender.im.host = mail.cybercorlin.net
log4j.appender.im.username = username
log4j.appender.im.password = password
log4j.appender.im.recipient = xxx@xxx.net

log4j.appender.im.layout=org.apache.log4j.PatternLayout
log4j.appender.im.layout.ConversionPattern =[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n

#控制台输出
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p (%F:%L) - %m%n

#保存到helloappLoggerlog.txt日志中，大小为100KB
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=F:/code/eclipse/workspace/TestLo4j/log/helloappLoggerlog.txt
log4j.appender.R.MaxFileSize=100KB
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d{yyyy MMM dd HH:mm:ss} %-5p %c - %m%n

java文件中用到日志
package com;
import org.apache.log4j.*;
public class TestLog4j {
    static Logger logger = Logger.getLogger("helloappLogger");
    public static void main(String[] args) {
//      PropertyConfigurator.configure("log4j.properties");
//      如果.properties在当前目录下可以省略，我放在项目根目录下，和com包同目录
        logger.debug("Debug ...");
        logger.info("Info ...");
        logger.warn("Warn ...");
        logger.error("Error ...");
    }
}

2.web project中配置log4j

还是先来看log4j.perproties

#级别为DEBUG，三个输出端，分别为stdout,FILE,R
log4j.logger.hello=DEBUG, stdout, FILE, R

#stdout是在控制台输出
log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=%5p (%F:%L) - %m%n

#保存在rolling_log_file.log日志中，appender是RollingFileAppender
#需要注意的是File=F:/code/...，不要写成\，这就一点害死我了
log4j.appender.R=org.apache.log4j.RollingFileAppender
log4j.appender.R.File=F:/code/eclipse/workspace/TestCvs/WebRoot/WEB-INF/rolling_log_file.log
log4j.appender.R.MaxFileSize=100KB
log4j.appender.R.MaxBackupIndex=1
log4j.appender.R.layout=org.apache.log4j.PatternLayout
log4j.appender.R.layout.ConversionPattern=%d{yyyy MMM dd HH:mm:ss} %-5p %c - %m%n

#保存在log_file.log日志中，appender是FileAppender
log4j.appender.FILE=org.apache.log4j.FileAppender
log4j.appender.FILE.File=F:/code/eclipse/workspace/TestCvs/WebRoot/WEB-INF/log_file.log
log4j.appender.FILE.Append=false
log4j.appender.FILE.layout=org.apache.log4j.PatternLayout
log4j.appender.FILE.layout.ConversionPattern=%d{yyyy MMM dd HH:mm:ss} %-5p %c - %m%n

之后要把它加入serlet中，和服务器一起启动，方便其他程序使用

public class Log4jServlet extends HttpServlet {
    public void init() throws ServletException {
        ServletContext sct = getServletContext();
        System.out.println("[Log4j]: The Root Path: " + sct.getRealPath("/"));
        System.out.println("[Log4j]: InitServlet init start...");
        PropertyConfigurator.configure(sct.getRealPath("/")
              +getServletConfig().getInitParameter("propfile"));
        System.out.println("[Log4j]: InitServlet init over.");
    }
}

<servlet>
    <description>init log4j of servlet</description>
    <display-name>log4j servlet</display-name>
    <servlet-name>Log4jServlet</servlet-name>
    <servlet-class>com.testCvs.Log4jServlet</servlet-class>
    <init-param>
     <param-name>propfile</param-name>
     <param-value>/WEB-INF/log4j.properties</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
</servlet>

注：log4j.properties放在/WEB-INF下，servlet自动加载这个文件

至此所有配置应该成功了，不过还是有些问题没有解决好，问了几个朋友也没有得到好的答复，但是现在可以在控制台和文件中输出日志，基本功能达到了。还请各位有空给我看看这个错误，欢迎指正。

错误如下：
log4j:WARN No appenders could be found for logger (org.apache.jasper.compiler.JspRuntimeContext).
log4j:WARN Please initialize the log4j system properly.