log4j tutorial

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

Label:Log4j can support log output to files, databases, and even remote servers, this tutorial takes the MySQL database as an example to explain: 1. Database designDatabase tables Table 4-1 Journal table (log) Field name Field interpretation Data type DataLength is empty Whether the primary key is a foreign key Id Log number bigint 20 Whether Is Whether

Method 1. The solution is to replace the absolute path with the relative path. In fact, the fileappender of log4j itself has such a mechanism, such as: log4j. appender. logfile. File =$ {workdir}/logs/APP. Log"$ {Workdir}/" is a variable and will be replaced by the value of "workdir" in system property. In this way, you can use system. setproperty ("workdir", workdir); To set the root path before loading th

First need to download log4j package, the current use of the most is still log4j 1.2, although Log4j 2 has been released, Log4j 1.2: http://logging.apache.org/log4j/1.2/download.htmlDownload complete decompression, log4j is a very

Transfer from http://www.jb51.net/article/41001.htm1 log4j Configuration Instructions1.1 Configuration FilesLog4j can be dynamically set through the Java program, the obvious disadvantage of this way is: if you need to modify the log output level and other information, you must modify the Java file, and then recompile, it is troublesome;Log4j can also be set by configuration file, currently supports two for

For log4j, it is generally used as long as you save the following content as a property file:1#log4j. rootlogger=Debug,a1,r2Log4j.rootlogger=Info,a1,r3log4j.appender.a1=Org.apache.log4j.ConsoleAppender4log4j.appender.a1.layout=Org.apache.log4j.PatternLayout5Log4j.appender.a1.layout.conversionpattern=%-d{yyyy-mm-dd hh:mm:ss,sss} [%c]-[%p]%m%N6 7Log4j.appender.r=Org.apache.log4j.RollingFileAppender8#

replace, avoid old write logger.isxxxenabled this helpless judgment, bring performance improvement see: Http://www.slf4j.org/faq.html#logging_performance.2.OSGI mechanism better compatible supportA picture wins thousands of words, a figure on the official website:From can find, choose still a lot of.Logback: As a general-purpose, fast and flexible log framework, lack is a complete implementation of the new log system as an alternative to log4j and sl

Directory First, log4j configuration Second, LOG4J2 configuration Project has been on the line for a long time, the project is using the log4j 1.x version, the original log can also be normal record, but operation and maintenance complained that your log is too large, catalina.out log output is infinite, so that some applications appear server storage alarm, so we recommend: "Appl

Log4j1.x has been widely used in various systems and frameworks. Then, 1.x is too old after all, the code has not been updated for a long time. Currently, the log4j 1.x code is difficult to maintain because it relies on many older versions of the JDK API. As a replacement for the log4j 1.x, Slf4j/logback has made great improvements to the log system, so why do we need l