An old article I wrote: Practice log4j

Previous articles are stuck here for backup

Purpose:
1. Write a fatal-level error to the 2000nt log
2. Send email notification to administrators for warn, error, and fatal errors
3. Other errors are output directly in the background.

Tutorial steps:
Output to 2000nt log
1. Copy the nteventlogappender. dll in the log4j compressed package to the WINNT/system32 directory.
2. Write the configuration file log4j. properties.

# System log output in 2000
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 %-5 p [% T] % 37C % 3x-% m % N

3. Call code:
Logger logger2 = logger. getlogger ("ntlog"); // The name must be the same as that set in the configuration file.
Logger2.debug ("Debug !!! ");
Logger2.info ("info !!! ");
Logger2.warn ("Warn !!! ");
Logger2.error ("error !!! ");
// Only this error will write the 2000 log
Logger2.fatal ("Fatal !!! ");

Send email notification to the Administrator:
1. First download javamail and JAF,
Http://java.sun.com/j2ee/ja/javamail/index.html
Http://java.sun.com/beans/glasgow/jaf.html
Reference mail. jar and activation. jar in the project.
2. Write the configuration file
# Send Logs to email
Log4j. Logger. maillog = warn, A5
# Appender A5
Log4j. appender. A5 = org.apache.log4j.net. smtpappender
Log4j. appender. a5.buffersize = 5
Log4j. appender. a5.to = chunjie@263.net
Log4j. appender. a5.from = error@error.com
Log4j. appender. a5.subject = errorlog
Log4j. appender. a5.smtphost = smtp.263.net
Log4j. appender. a5.layout = org. Apache. log4j. patternlayout
Log4j. appender. a5.layout. conversionpattern = %-4r %-5 p [% T] % 37C % 3x-% m % N
3. Call code:
// Send Logs to mail
Logger logger3 = logger. getlogger ("maillog ");
Logger3.warn ("Warn !!! ");
Logger3.error ("error !!! ");
Logger3.fatal ("Fatal !!! ");

Output errors of all types in the background:
1. Write the configuration file
# Output in the background
Log4j. Logger. Console = debug, A1
# Appender A1
Log4j. appender. A1 = org. Apache. log4j. leleappender
Log4j. appender. a1.layout = org. Apache. log4j. patternlayout
Log4j. appender. a1.layout. conversionpattern = %-4r %-5 p [% T] % 37C % 3x-% m % N
2. Call Code
Logger logger1 = logger. getlogger ("console ");
Logger1.debug ("Debug !!! ");
Logger1.info ("info !!! ");
Logger1.warn ("Warn !!! ");
Logger1.error ("error !!! ");
Logger1.fatal ("Fatal !!! ");

--------------------------------------------------------------------
All configuration files: log4j. Properties
# Output in the background
Log4j. Logger. Console = debug, A1
# Appender A1
Log4j. appender. A1 = org. Apache. log4j. leleappender
Log4j. appender. a1.layout = org. Apache. log4j. patternlayout
Log4j. appender. a1.layout. conversionpattern = %-4r %-5 p [% T] % 37C % 3x-% m % N

# System log output in 2000
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 %-5 p [% T] % 37C % 3x-% m % N

# Send Logs to email
Log4j. Logger. maillog = warn, A5
# Appender A5
Log4j. appender. A5 = org.apache.log4j.net. smtpappender
Log4j. appender. a5.buffersize = 5
Log4j. appender. a5.to = chunjie@263.net
Log4j. appender. a5.from = error@error.com
Log4j. appender. a5.subject = errorlog
Log4j. appender. a5.smtphost = smtp.263.net
Log4j. appender. a5.layout = org. Apache. log4j. patternlayout
Log4j. appender. a5.layout. conversionpattern = %-4r %-5 p [% T] % 37C % 3x-% m % N

All code: log4jtest. Java
/*
* Creation date: 2003-11-13
*/
Package edu. BCU. Bean;
Import org. Apache. log4j .*;
// Import org. Apache. log4j. nt .*;
// Import org.apache.log4j.net .*;
/**
* @ Author yanxu
*/
Public class log4jtest
{
Public static void main (string ARGs [])
{
Propertyconfigurator. Configure ("log4j. properties ");
// Output in the background
Logger logger1 = logger. getlogger ("console ");
Logger1.debug ("Debug !!! ");
Logger1.info ("info !!! ");
Logger1.warn ("Warn !!! ");
Logger1.error ("error !!! ");
Logger1.fatal ("Fatal !!! ");

// Output logs in the NT System
Logger logger2 = logger. getlogger ("ntlog ");
// Nteventlogappender NLA = new nteventlogappender ();
Logger2.debug ("Debug !!! ");
Logger2.info ("info !!! ");
Logger2.warn ("Warn !!! ");
Logger2.error ("error !!! ");
// Only this error will write the 2000 log
Logger2.fatal ("Fatal !!! ");

// Send Logs to mail
Logger logger3 = logger. getlogger ("maillog ");
// Smtpappender SA = new smtpappender ();
Logger3.warn ("Warn !!! ");
Logger3.error ("error !!! ");
Logger3.fatal ("Fatal !!! ");
}
}