Log4j_slf4j log4j. Properties

The log used by Hibernate is slf4j, and slf4j has various implementation strategies.

Using log4j is one of the methods. Jar package:

Log4j-1.2.16.jar

Slf4j-api-1.6.1.jar

Slf4j-log4j12-1.6.1.jar   The configuration file is placed in the SRC root directory. The configuration file name isLog4j. Properties Example:   Log4j. appender. stdout = org. Apache. log4j. leleappender Log4j. appender. stdout. Target = system. Out Log4j. appender. stdout. layout = org. Apache. log4j. patternlayout Log4j. appender. stdout. layout. conversionpattern = % d {absolute} % 7 P % C: % L-% m % N Log4j. rootlogger = warn, stdout Log4j.logger.org. hibernate. SQL = debug Log4j.logger.org. hibernate. JDBC = info   Usage in the class: Private Static logger = logger. getlogger (addservlet. Class );   Logger. debug ("debug info "); Logger.info ("info Info "); Logger. Warn ("Warning Info "); Logger. Error ("error Info "); Logger. Fatal ("Fatal Info ");   Detailed explanation:   Levels are off, fatal, error, warn, info, debug, all in sequence. Debug <info <warn <error <fatal.   D Date and Time   C Class Name   N Line feed, that is, enter   M Specific info   L Row number   P Priority

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