log4j的初始配置

  1. 若是是web工程,就將jar包考到lib下面;若是是普通java工程,就直接添加jar包(log4j-1.2.8.jar)
    2.在src目錄下直接建立log4j.properties文件,文件內容以下:
log4j.rootLogger=DEBUG,CONSOLE,DATABASE,FILE
log4j.addivity.org.apache=true

# 應用於控制檯
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.Threshold=INFO
log4j.appender.CONSOLE.Target=System.out
log4j.appender.CONSOLE.Encoding=GBK
log4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayout
log4j.appender.conOut.layout.ConversionPattern=%d %-5p [%c] %m%n


# 用於數據庫
log4j.appender.DATABASE=org.apache.log4j.jdbc.JDBCAppender
log4j.appender.DATABASE.URL=jdbc:oracle:thin:@192.168.0.103:1521:ORCL
log4j.appender.DATABASE.driver=oracle.jdbc.driver.OracleDriver
log4j.appender.DATABASE.user=Nation
log4j.appender.DATABASE.password=1
log4j.appender.CONSOLE.Threshold=WARN
log4j.appender.DATABASE.sql=INSERT INTO LOG4J(stamp,thread, infolevel,class,messages) VALUES ('%d{yyyy-MM-dd HH:mm:ss}', '%t', '%p', '%l', '%m')

# INSERT INTO LOG4J (Message) VALUES ('[framework] %d - %c -%-4r [%t] %-5p %c %x - %m%n')

# 寫入數據庫中的表LOG4J的Message字段中,內容%d(日期)%c: 日誌信息所在地(類名)%p: 日誌信息級別%m: 產生的日誌具體信息 %n: 輸出日誌信息換行
log4j.appender.DATABASE.layout=org.apache.log4j.PatternLayout
log4j.appender.DATABASE.layout.ConversionPattern=%d %-5p [%c] %m%n
 
# 天天新建日誌

#(警告的意思是DailyRollingFileAppender這個類不帶屬性maxBackupIndex,maxFileSize的,它是#按日期來保存日誌的,因此不須要設置該2個屬性,若是想要設置日誌文件的大小,能夠使用#RollingFileAppender這個類,平時開發中日誌配置文件中須要注意設置。)
log4j.appender.A1=org.apache.log4j.DailyRollingFileAppender
log4j.appender.A1.File=./logs/cebLog.txt
log4j.appender.A1.Encoding=GBK
log4j.appender.A1.Threshold=DEBUG
log4j.appender.A1.DatePattern='.'yyyy-MM-dd
log4j.appender.A1.layout=org.apache.log4j.PatternLayout
log4j.appender.A1.layout.ConversionPattern=%d{ABSOLUTE} %5p %c{1}:%L : %m%n
 
#應用於文件

#(警告的意思是DailyRollingFileAppender這個類不帶屬性maxBackupIndex,maxFileSize的,它是#按日期來保存日誌的,因此不須要設置該2個屬性,若是想要設置日誌文件的大小,能夠使用#RollingFileAppender這個類,平時開發中日誌配置文件中須要注意設置。)
log4j.appender.File=org.apache.log4j.DailyRollingFileAppender
log4j.appender.File.File=./logs/cebLog.txt
log4j.appender.File.DatePattern='_'yyyy-MM-dd'.txt'

#log4j.appender.File.MaxFileSize=100KB
#log4j.appender.File.MaxBackupIndex=100
log4j.appender.File.layout=org.apache.log4j.PatternLayout
log4j.appender.File.layout.ConversionPattern=%d %t %-5p [%c] %m%n
 
# 應用於文件回滾(即文件到達MaxFileSize就會產生一個新的文件,MaxBackupIndex是指文件的最大數目)
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.CONSOLE_FILE.Encoding=GBK
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=%d %-5p [%c] %m%n
 
#自定義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 = yyflyons@163.com
log4j.appender.im.layout=org.apache.log4j.PatternLayout
log4j.appender.im.layout.ConversionPattern =%d %-5p [%c] %m%n
 
#應用於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
 
# 發送日誌給郵件
log4j.appender.MAIL=org.apache.log4j.net.SMTPAppender
log4j.appender.MAIL.Threshold=FATAL
log4j.appender.MAIL.BufferSize=10
log4j.appender.MAIL.From=yyflyons@163.com
log4j.appender.MAIL.SMTPHost=www.wusetu.com
log4j.appender.MAIL.Subject=Log4J Message
log4j.appender.MAIL.To=yyflyons@126.com
log4j.appender.MAIL.layout=org.apache.log4j.PatternLayout
log4j.appender.MAIL.layout.ConversionPattern=%d %-5p [%c] %m%n
這裏面你是能夠選擇性的添加的的,我只是將全部的appender給列了出來,至於爲何這麼寫,網上不少資料,我就不囉嗦了。
 
3.package com.iflytek.test;


import org.apache.log4j.Logger;




public class Log4jJunit {


 private static Logger logger = Logger.getLogger(Log4jJunit.class.getName());


 public static void main(String[] args) {
 logger.error("測試");
 }
 
}


4.結果 java

測試 log4j:ERROR Could not find value for key log4j.appender.DATABASE log4j:ERROR Could not instantiate appender named "DATABASE". log4j:ERROR Could not find value for key log4j.appender.FILE log4j:ERROR Could not instantiate appender named "FILE". web

(若是你只選擇在控制檯上打印信息的話)
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