log4j android

Log4j is a reliable, fast and flexible log framework (API) written in Java, which is published under the Apache software license.LOG4J has been ported to languages such as C,c++,c#,perl,python and Ruby. The log4j is highly configurable and can be configured by external files at run time. It is based on the priority level of records and provides mechanisms to indicate the logging of information to many desti

1. log4j's configuration fileLOG4J supports two configuration file formats, one in XML format and one for Java attribute file lg4j.properties (key = value). 1.1. log4j configuration scripts in properties formatThe Lg4j.properties file is used as a common configuration file in the following ways: ? Configure Root LoggerLogger is responsible for most of the operations that log records are processed.Its syntax is:Log4j.rootlogger = [level], Appendername,

=org.apache.log4j.ConsoleAppenderlog4j.appender.stdout.layout=org.apache.log4j.PatternLayoutlog4j.appender.stdout.layout.ConversionPattern=[QC] %p [%t] %C.%M(%L) | %m%n log4j.appender.R=org.apache.log4j.DailyRollingFileAppenderlog4j.appender.R.File=D:\\Tomcat 5.5\\logs\\qc.loglog4j.appender.R.layout=org.apache.log4j.PatternLayout1log4j.appender.R.layout.ConversionPattern=%d-[TS] %p %t %c - %m%nlog4j.logger.com.neusoft=DEBUGlog4j.logger.com.opensymphony.oscache=ERRORlog4j.logger.net.sf.navigator=

To be perfected:(1). Here is an introduction to log4j more detailed blog, a cursory look at the next time to look deeper, write a more in-depth introduction, the first link recorded here:Log4j Detailed IntroductionThe log about log4j has been confused. Here is a summary summary:(2) log4j has a lot of bugs, such as deadlock. Now there are logback and log4j2. I'll

When the project is on-line, the runtime often also has an exception, in the exception throws, want to get feedback immediately. So you need to configure the log4j send email function.The original version of log4j used in the project is 1.2.9, but this version does not support the authentication function of the mail service, so the latest version 1.2.14 is downloaded again to view the source codeThis versio

Reprint, original website: http://blog.csdn.net/wud_jiyanhui/article/details/6213443The concept and function of system logAs an application service, the log system plays an important role in tracking debugging, program state record, and recovery of crash data .Common Java Log SystemLog4jOne of the earliest Java log frameworks, launched by the Apache Foundation, provides a flexible and powerful logging mechanism.JDK1.4 LoggingframeworkFollowing log4j

1.1 Preparation work One, Tomcat has been properly configured and used. Second, software download: log4j------Http://www.apache.org/dist/jakarta/log4j/jakarta-log4j-1.2.8.zip 1.2. log4j Introduction In emphasizing reusable component development today, in addition to developing a reusable log operation class from be

Log4j configuration is commonly used. Two methods are generally used:. properties AND. xml. The following two simple examples are provided:1. log4j. properties ### Set org. level INFO, DEBUG, WARN, ERROR, and output location A1, A2 # log4j.category.org. zblog = ERROR, A1log4j.category.org. zblog = INFO, A2log4j. appender. a1 = org. apache. log4j. consoleAppender

1. Basic Configuration # The simplicity of log4j configuration makes it more and more widely used # The log4j configuration file outputs to the console, files, rollback files, send log emails, and output to the database log tables, custom tags, and other functions. # Generally, log files or databases are usually output. In this example, output files are used. # we recommend that you use only four levels of

1 Overview This document is a guide to using the LOG4J logging tool. Includes: Log introduction, logging tool Introduction, LOG4J basic usage, advanced use of log4j, integration of spring and log4j, etc. And an example is illustrated. This document is intended for all Java developers. 2nd Blog Introduction A file th

One: log4j Introduction to Learning Log4j is an open source project for Apache, by using log4j, we can control the destination of log information delivery is console, file, GUI component, even interface server, NT Event recorder, UNIX syslog daemon, etc. We can also control the output format of each log, and by defining the level of each log information, we can

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

First, IntroductionLOG4J is an Apache open source project, by using log4j, we can control the destination of log information delivery is console, file, GUI component, even socket server , NT Event recorder, UNIX syslog daemon, etc. We can also control the output format of each log, and by defining the level of each log information, we can control the log generation process more carefully. Log4j consists of

1. log4j IntroductionLog4j is an open-source project of Apache. It allows developers to output log information at any interval. Log4j consists of three main types of components: 1) logger-is responsible for outputting log information and classifying and filtering log information to determine which logs should be output and which should be ignored. The loggers component outputs log information at five levels

1) download the log4j Program Http://logging.apache.org/log4j/1.2/download.html After decompression, the directory on my machine is as follows:~ /Work/apache-log4j-1.2.15 To re-compile maven2, you can refer to the content of the install file. You do not need to compile. 2) In ~ Add socketserver. properties, a server-side configuration file, in the/work/apache-

The log system is needed for server development recently, so the log framework under Apache is studied.The current log system, supported by the language has C++,php,.net,java. Of course I use the Java server, choose to use log4j bar. But suddenly found that log4j 2 is more interesting, the official website also mentions that there is a performance ratio of 1. X has a bigger boost, and there are a lot of art

Log4j. properties Configuration: Log4j. rootlogger = info, root, file, JDBC Log4j. appender. Root = org. Apache. log4j. leleappenderLog4j. appender. Root. layout = org. Apache. log4j. patternlayoutLog4j. appender. root. layout. conversionpattern = %-5 p % d {yyyy-mm-dd hh:

The log4j configuration file is described in the preceding article, and today describes how to use log4j in a common Javaweb project.In the daily development process, the log is used very frequently, we can use the log to track the program errors, program runtime output parameters, etc., in many cases may use SYSTEM.OUT.PRINTLN () This method, but there is a more concise way, that is, using the log framewor

Write in front In project development, logging error logs has the following benefits: Easy Commissioning Easy to find errors during system operation Store business data for post-analysis purposes In Java, there are many ways to log logs: Own implementation Write your own class, log data to IO operation, write data to a text file, a database. Using log4j LOG4J