log4j入门及常用配置

 

<pre class="java" name="code">import org.apache.log4j.BasicConfigurator;
import org.apache.log4j.Level;
import org.apache.log4j.Logger; 

public class TestLog4J {
    public static void main(String[] args) {
        // create a log for TestLog4J class
        Logger logger = Logger.getLogger(TestLog4J.class);
        // use the default config
       BasicConfigurator.configure();
       // set this log level ,it will hide if it's output level lower this level
        logger.setLevel(Level.ALL);

        logger.debug("this is debug");
        logger.info("this is info");
        logger.error("this is a error");
        logger.fatal("this is a fatal error");
    } 

} </pre>

<pre name="code" class="plain"><span style="">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  //文件位置,也可以用变量${java.home}、rolling.log
 log4j.appender.ROLLING_FILE.Append=true       //true:添加  false:覆盖
 log4j.appender.ROLLING_FILE.MaxFileSize=10KB   //文件最大尺寸
 log4j.appender.ROLLING_FILE.MaxBackupIndex=1  //备份数
 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=web@www.wuset.com
 log4j.appender.MAIL.SMTPHost=www.wusetu.com
 log4j.appender.MAIL.Subject=Log4J Message
 log4j.appender.MAIL.To=web@www.wusetu.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</span></pre>