Log4j configuration file interpretation and template page favorites

Recently, I am interested in the log configuration of log4j. After carefully studying it, I have a clear understanding of it. By the way, I have created a log file template for later viewing and using, by the way, I also provided some detailed and simple information for those who viewed log files in the cloud.

　　

# Configure the overall Log Level and output purpose: note that the overall log level will overwrite the respective log levels of the output destination below, I set it to null and Log Level Controlled by each sub-item # A1 A2 is the name of the output destination respectively: I set A1 to console print A2 set to record the log to the file log4j. rootlogger =, a1, a2 # detailed configuration output by a1 leleappender outputs log4j for the console. appender. a1 = org. apache. log4j. consoleappender # threshold attribute) log4j output is not allowed for logs with lower levels than rootlogger logs. appender. a1.threshold = info # layout is clearly the meaning of layout. patternlayout is the layout mode log4j that can flexibly specify the output format. appender. a1.layout = org. apache. log4j. patternlayout # specify how to format the conversionpattern attribute: % d is the time output, you can specify the # % P output log level, that is, debug, info, warn, error .. one of the categories of # % C output log information is usually the full name of the class, such as Org. apache. log4j. logger; {2} limits the output directory % c {2} To log4j. logger # % F: name of the file where the output Log message is generated % L: row number in the output Code, for example, test0815.java: 16 (16 is the row number) # % m indicates the output log Content. % N indicates the output line break and press Enter. The total output is as follows :****-**-****:**: ** warn mod1408.test0815 (test0815.java: 16)-This is warn log4j. appender. a1.layout. conversionpattern = % d {yyyy-mm-dd hh: mm: SS} % P % c {2} (% F: % L) -% m % N # A2 output setting dailyrollingfileappender (and a log file generated every day) log4j. appender. a2 = org. apache. log4j. dailyrollingfileappender # location and file name of the log file log4j. appender. a2.file = D :\\ forwork \ logs \ log4j. loglog4j. appender. a2.threshold = warn # append attribute: The default value is true. To add a message to a specified file, false indicates that the message overwrites the specified file content log4j. appender. a2.append = true # immediateflush = true: the default value is true, meaning that all messages will be output to log4j immediately. appender. a2.immediateflush = truelog4j. appender. a2.layout = org. apache. log4j. patternlayoutlog4j. appender. a2.layout. conversionpattern = % d {yyyy-mm-dd hh: mm: SS} % P % c {2} (% F: % L) % 1x-% m % N # frequency setting of datepattern to update logs. Below is a log file updated every day, named log4j. log. ****-**-**. log, used as the file for storing historical logs # Set log4j. the log file is always the new log log4j stored on the current day. appender. a2.datepattern = '. 'yyyy-mm-dd '. log' # output Org. apache. debug-level logs generated by the ibatis class log4j.logger.org. apache. ibatis = debug # Java. debug-level information generated by SQL and subclass log4j. logger. java. SQL = debug # output Org. the warn level information generated by springframework classes and subclasses log4j.logger.org. springframework = warn # print logs of other frameworks to find relevant documents