| Beschreibung |
log4j is a tool to help the programmer output log statements to a variety of
output targets.
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It is possible to enable logging at runtime without modifying the application
binary. The log4j package is designed so that log statements can remain in
shipped code without incurring a high performance cost.
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One of the distinctive features of log4j is the notion of hierarchical
loggers. Using loggers it is possible to selectively control which log
statements are output at arbitrary granularity.
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Log4j can output to: a file, a rolling file, a database with a JDBC driver,
many ouput asynchronously, a JMS Topic, a swing based logging console,
the NT event log, /dev/null, a SMTP server (using javamail), a socket server,
syslog, telnet daemon and stdout.
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The format of the output can be defined using one of the various layout
(or user defined layout) like: simple text, html, date, pattern defined and
XML.
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