log4j:WARN No appenders could be found for logger (org.apache.catalina.startup.T
ldConfig).
log4j:WARN Please initialize the log4j system properly.我的log4j.properties内容是log4j.logger.ROLLING_FILE=DEBUG,console,file
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.file=org.apache.log4j.RollingFileAppenderlog4j.appender.file.File=D:/Tomcat 5.0/webapps/log/log.txt
log4j.appender.console.layout=org.apache.log4j.SimpleLayoutlog4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%t %p - %m%nlog4j.rootLogger=DEBUG########################
# Rolling File
########################
log4j.logger.ROLLING_FILE=DEBUG,ROLLINGfile
log4j.appender.ROLLINGfile=org.apache.log4j.RollingFileAppender
log4j.appender.ROLLINGfile.File=D:/Tomcat 5.0/webapps/log/errlog/err.log
log4j.appender.ROLLINGfile.Append=true
log4j.appender.ROLLINGfile.MaxFileSize=1024KB
log4j.appender.ROLLINGfile.MaxBackupIndex=10
log4j.appender.ROLLINGfile.layout=org.apache.log4j.PatternLayout
log4j.appender.ROLLINGfile.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n
########################
#DailyRollingFileAppender
########################
log4j.logger.Daily_FILE=DEBUG,Dailyfile
log4j.appender.Dailyfile=org.apache.log4j.DailyRollingFileAppender
log4j.appender.Dailyfile.File=D:/Tomcat 5.0/webapps/log/datelog/yingyong
log4j.appender.Dailyfile.DatePattern='_'yyyy-MM-dd'.log'
log4j.appender.Dailyfile.layout=org.apache.log4j.PatternLayout
log4j.appender.Dailyfile.layout.ConversionPattern=[%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%m%n
请问我应该怎么设置
ldConfig).
log4j:WARN Please initialize the log4j system properly.我的log4j.properties内容是log4j.logger.ROLLING_FILE=DEBUG,console,file
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.file=org.apache.log4j.RollingFileAppenderlog4j.appender.file.File=D:/Tomcat 5.0/webapps/log/log.txt
log4j.appender.console.layout=org.apache.log4j.SimpleLayoutlog4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=%t %p - %m%nlog4j.rootLogger=DEBUG########################
# Rolling File
########################
log4j.logger.ROLLING_FILE=DEBUG,ROLLINGfile
log4j.appender.ROLLINGfile=org.apache.log4j.RollingFileAppender
log4j.appender.ROLLINGfile.File=D:/Tomcat 5.0/webapps/log/errlog/err.log
log4j.appender.ROLLINGfile.Append=true
log4j.appender.ROLLINGfile.MaxFileSize=1024KB
log4j.appender.ROLLINGfile.MaxBackupIndex=10
log4j.appender.ROLLINGfile.layout=org.apache.log4j.PatternLayout
log4j.appender.ROLLINGfile.layout.ConversionPattern=[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n
########################
#DailyRollingFileAppender
########################
log4j.logger.Daily_FILE=DEBUG,Dailyfile
log4j.appender.Dailyfile=org.apache.log4j.DailyRollingFileAppender
log4j.appender.Dailyfile.File=D:/Tomcat 5.0/webapps/log/datelog/yingyong
log4j.appender.Dailyfile.DatePattern='_'yyyy-MM-dd'.log'
log4j.appender.Dailyfile.layout=org.apache.log4j.PatternLayout
log4j.appender.Dailyfile.layout.ConversionPattern=[%-5p] %d{yyyy-MM-dd HH:mm:ss,SSS} method:%m%n
请问我应该怎么设置
log4j.rootLogger=INFO,R,stdout
# Print only messages of priority WARN or higher for your category
log4j.category.your.category.name=WARN
#### 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
#### Second appender writes to a file
log4j.appender.R=org.apache.log4j.RollingFileAppender
#### 注意必须是"/"
log4j.appender.R.File=c:/mylog.log
# 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=%p %t %c - %m%n
public static Logger Logger.getLogger(String name)获得一个named logger
或者
public static Logger Logger.getLogger(Class clazz)获得一个named logger
在程序中获取指定的logger你也可以参考http://blog.csdn.net/chiefwolf/archive/2006/07/12/911863.aspx
我的web.xml加了
<servlet>
<servlet-name>log4j</servlet-name>
<servlet-class>mypack.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>
mypack.Log4JServlet的代码是:
package mypack;import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;import org.apache.log4j.PropertyConfigurator;public class Log4JServlet extends HttpServlet { public void init()
throws ServletException { // Get Fully Qualified Path to Properties File
String path = getServletContext().getRealPath("/");
String propfile = path + getInitParameter("propfile"); // Initialize Properties for All Servlets
PropertyConfigurator.configure(propfile);
}}