spring log4j configuration example

Log4j 2.0 advanced usage in development-read configuration file (6) and log4j usageIn log4j, the location where log files are stored is not necessarily under src, that is, under the root directory. In this case, we need to solve the problem of loading the configuration file.

to the dimension output by % d {Num} And Num Class Name (for example, "org. apache. elattings. className ", % C {2} Will output elattings. className)% D: the log output time is in the format of % d {yyyy-MM-dd HH: mm: ss, SSS}. You can specify the format, for example, % d {HH: mm: ss}% L location of log event output, including category name, thread, number of lines in the code% N line break% M output code

= Log. getLoger ();System. out. println (str );Log. loger. error (e. getMessage (), e );}} Run the main function to create a log in your corresponding file. Note: The preceding backup file is generated every day, and there is no date on the day. The log file of the previous day will only appear on the second day. Log4j getting started Configure Log4j in Hibernate to display SQL Parameters

Logging naturally is very important, but I am afraid to remember slf4j and log4j, such as the configuration of the log framework is very few people, this thing is not difficult, but only after the configuration is rarely to move it, the development of new projects are usually copied from other projects, or reference to the documentNeedless to say, say

(); Information to debug the program. Of course, after the program debugging is completed, we don't need the output information. What should we do? The previous practice was to delete logger.info in each program, but this is unrealistic. If the program is not big enough, but if there are many programs, it will be annoying to do these things. However, because log4j is classified, when we do not need to output the log.info () used for such debugging, w

levels of log4j. The priority ranges from high to low: error, warn, info, and debug.Only log information with a higher priority or equal to the set level is forwarded. For example, if it is defined as info, logs with a debug level in the program will not be output.Log4j. rootlogger is the parent object of all recorders (formerly rootcategory obsolete) and can be used to set the default priority of all reco

rootLogger level. Under this premise, the logger levels take effect based on their own settings. MyBatis Study Notes series I: download and install ant Prepare for MyBatis Study Notes Series II: ant getting started MyBatis learning notes: MyBatis getting started MyBatis Study Notes Series II: Example of adding, deleting, and modifying MyBatis MyBatis Study Notes Series 3: association examples of MyBatis MyBatis Study Notes Series 4: two forms of MyB

:========================================================== ========================================================== ============================================================================ ========================================================== ====================Example of the log4j. properties File1. ========================================================== ====================================

all classes under the Com.neusoft package have a level of debug.You can change the Com.neusoft to the name of the package you used for your project.Log4j.logger.com.opensymphony.oscache=errorLog4j.logger.net.sf.navigator=errorThese two sentences are to set the error level of the two packages to be errors, if there is no configuration Ehcache in the project, you do not need these two sentences.Log4j.logger.org.apache.commons=errorLog4j.logger.org.apac