log4j android

In the selection of slf4j-api-1.7.7.jar + slf4j-log4j12-1.7.7.jar + log4j-1.2.17.jar output (the premise is that there is a corresponding configuration file log4j. properties, put in the root directory, usually SRC folder) to the file logs. log and errors. Log 1. The basic format is as follows: # Configure root loggerlog4j. rootlogger = [level], appendername1, appendername2 ,... # Configure the log output

Log4j usage notes Log4j is an open source project of Apache. By using log4j, programmers can control the destination of log information delivery, including the console, files, Gui components, and NT event recorder. They can also control the output format of each log, you can also define the level of each log to control the log generation process in greater detail

The website is about to be released. To track some logs, you need to use log4j. So I studied the configuration of log4j. First, paste a configuration source file log4j. properties. log4j.rootLogger=DEBUG, CONSOLE, FILE## for consolelog4j.appender.CONSOLE=org.apache.log4j.ConsoleAppenderlog4j.appender.CONSOLE.layout=org.apache.log4j.PatternLayoutlog4j.appender.CO

Let's look back at the parameters.1InCCreate a new diskLog4jtest. Java,The content is as follows::Import org. Apache. commons. Logging. log;Import org. Apache. commons. Logging. logfactory;Public class log4jtest{Static log = logfactory. getlog (log4jtest. Class. getname ());Public static void main (string [] ARGs){Log.info ("I'm testing");Int x = 0;Try{X = 5/X;}Catch (exception E){Log.info (E );Log. debug (E );}}} 2CopyJarPackageCDiskLog4j-1.2.15.jarAndCommons-logging.jar)

　 Introduction Log4j is an open-source project of Apache. By using log4j, we can control the log information delivery destination, such as the console, file, database, and even the interface server; you can also control the output format of each log. By defining the level of each log information, you can control the log generation process in greater detail.When necessary, you can use a con

1. Overview1.1 Backgroundin our daily development, logging is very important. Adding logging in an application in general, it is based on three purposes: monitoring the change of variables in the code, periodically recording to the file for other applications for statistical analysis work, tracking code run-time trajectory as the basis for future audits, as the role of the debugger in the integrated development environment, Debug information that prints code to a file or console. 1.2 Introducti

Exception Handling 2. Exception handling Experience 3. Use of assertions 4. logs in Java (JDK1.4 Logging Framework) 5. Third-party Log library (log4j, Commons Logging Framework) 5. Third-party log library (log4j,commons Logging Framework) The official log framework JDK 1.4 Logging Framework is presented, followed by a description of the two Third-party log framework

Transferred from: http://www.blogjava.net/daiyongzhi/archive/2014/04/13/412364.htmlcommon-logging is a common log interface provided by Apache. The user is free to choose the third party's log component as a concrete implementation, like log4j, or the logging that comes with the JDK, common-logging will automatically find the log library that is actually used when the program runs by dynamic lookup mechanism. Of course, there is a simple logger implem

Common-loggingcommon-logging is a common log interface provided by Apache. The user is free to choose the third party's log component as a concrete implementation, like log4j, or the logging that comes with the JDK, common-logging will automatically find the log library that is actually used when the program runs by dynamic lookup mechanism. Of course, there is a simple logger implementation of common-logging inside, but the function is very weak. So

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 log4j first, use l