log4j Custom Appender

The LOG4J environment consists of three main components:

Logger (Logger): controls which logging statements are enabled or disabled. The following levels can be set for the logger:

All, DEBUG, INFO, WARN, ERROR, FATA, OFF.

layout: formats logging requests According to the user's wishes.

Appender: sends formatted output to the destination. Log4j brought in also remember the Appender as follows:

1. Consoleappender
2. Fileappender
3. Smtpappender
4. Jdbcappender
5. Jmsappender
6. Nteventappender
7. Syslogappender

You can also create a custom Appender

Gorgeous split-rich ***************************************** ***************************************

Create a custom Appender

1. Inherit the Appenderskeleton class and implement three methods ( you can also inherit existing Appender, override some methods, and implement the required logic)

 Public classSimpleappenderextendsAppenderskeleton {//Configure required properties in Log4j.xml, where you can injectPrivateString Developer; @Overrideprotected voidAppend (loggingevent loggingevent) {
Custom Output what System.out.println ("=========" + developer + "test===========" +loggingevent.getmessage ()); } @Override Public BooleanRequireslayout () {
Whether layout is required, or false, even if Log4j.xml is configured with layout does not take effect. return false; } @Override Public voidClose () {
Release resource this.closed = true; }     PublicString Getdeveloper () {returndeveloper; }     Public voidSetdeveloper (String developer) { This. Developer =developer; }

2. Configure Log4j.xml

 <!--  -->  <  appender  name  = "Simpleappender"   class  = "Com.cn.simple.logger.SimpleAppender"  >  <  param 
     name  = "developer"   = "Lqw"  ></ " Span style= "COLOR: #800000" >param  >   </ appender  >  

3. Implementation

        Logger.info ("[Springdemo]--------Info");        Logger.warn ("[Springdemo]--------warn reminder");        Logger.error ("[Springdemo]--------Error Exception");    

4. Output results

=========lqwtest===========[springdemo]--------info =========lqwtest===========[springdemo]-------- warn alert =========lqwtest===========[springdemo]--------Error exception

Reference Documentation:

Http://www.360doc.com/content/16/0121/16/14567867_529569233.shtml

Log output to frame reference:

http://zhangjunhd.blog.51cto.com/113473/48895/

log4j Custom Appender